/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/array-lopstr16/partial_lesser_bound.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:47:39,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:47:39,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:47:39,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:47:39,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:47:39,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:47:39,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:47:39,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:47:39,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:47:39,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:47:39,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:47:39,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-21 22:47:39,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:47:39,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:47:39,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:47:39,989 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:47:40,055 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:47:40,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:47:40,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:47:40,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:47:40,062 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:47:40,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:47:40,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:47:40,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:47:40,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:47:40,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:47:40,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:47:40,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:47:40,066 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:47:40,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:47:40,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:47:40,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:47:40,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:47:40,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:47:40,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:47:40,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:47:40,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:47:40,068 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:47:40,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:47:40,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:47:40,069 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:47:40,069 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:47:40,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:47:40,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:47:40,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:47:40,572 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:47:40,573 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:47:40,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/partial_lesser_bound.i [2020-12-21 22:47:40,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55267fa2e/7f173b69962c4170aa64d0478a6a030c/FLAGd373079f3 [2020-12-21 22:47:41,530 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:47:41,531 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/partial_lesser_bound.i [2020-12-21 22:47:41,541 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55267fa2e/7f173b69962c4170aa64d0478a6a030c/FLAGd373079f3 [2020-12-21 22:47:41,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55267fa2e/7f173b69962c4170aa64d0478a6a030c [2020-12-21 22:47:41,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:47:41,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:47:41,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:47:41,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:47:41,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:47:41,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:47:41" (1/1) ... [2020-12-21 22:47:41,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa00ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:41, skipping insertion in model container [2020-12-21 22:47:41,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:47:41" (1/1) ... [2020-12-21 22:47:41,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:47:41,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:47:42,069 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/partial_lesser_bound.i[813,826] [2020-12-21 22:47:42,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:47:42,105 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:47:42,120 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/partial_lesser_bound.i[813,826] [2020-12-21 22:47:42,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:47:42,148 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:47:42,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:42 WrapperNode [2020-12-21 22:47:42,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:47:42,151 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:47:42,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:47:42,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:47:42,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:42" (1/1) ... [2020-12-21 22:47:42,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:42" (1/1) ... [2020-12-21 22:47:42,195 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:47:42,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:47:42,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:47:42,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:47:42,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:42" (1/1) ... [2020-12-21 22:47:42,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:42" (1/1) ... [2020-12-21 22:47:42,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:42" (1/1) ... [2020-12-21 22:47:42,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:42" (1/1) ... [2020-12-21 22:47:42,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:42" (1/1) ... [2020-12-21 22:47:42,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:42" (1/1) ... [2020-12-21 22:47:42,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:42" (1/1) ... [2020-12-21 22:47:42,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:47:42,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:47:42,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:47:42,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:47:42,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 22:47:42,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-21 22:47:42,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:47:42,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-21 22:47:42,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:47:42,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-21 22:47:42,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:47:42,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:47:42,896 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:47:42,896 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-21 22:47:42,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:47:42 BoogieIcfgContainer [2020-12-21 22:47:42,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:47:42,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:47:42,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:47:42,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:47:42,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:47:41" (1/3) ... [2020-12-21 22:47:42,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e94081d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:47:42, skipping insertion in model container [2020-12-21 22:47:42,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:47:42" (2/3) ... [2020-12-21 22:47:42,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e94081d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:47:42, skipping insertion in model container [2020-12-21 22:47:42,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:47:42" (3/3) ... [2020-12-21 22:47:42,916 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_lesser_bound.i [2020-12-21 22:47:42,926 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:47:42,934 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:47:43,013 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:47:43,100 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:47:43,101 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:47:43,101 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:47:43,101 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:47:43,101 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:47:43,102 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:47:43,103 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:47:43,103 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:47:43,131 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-21 22:47:43,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 22:47:43,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:43,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:43,145 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:43,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:43,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2020-12-21 22:47:43,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:43,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992281335] [2020-12-21 22:47:43,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:43,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992281335] [2020-12-21 22:47:43,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:47:43,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:47:43,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937530314] [2020-12-21 22:47:43,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:47:43,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:43,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:47:43,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:47:43,544 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-12-21 22:47:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:43,730 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2020-12-21 22:47:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:47:43,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-21 22:47:43,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:43,747 INFO L225 Difference]: With dead ends: 42 [2020-12-21 22:47:43,748 INFO L226 Difference]: Without dead ends: 24 [2020-12-21 22:47:43,751 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 [2020-12-21 22:47:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-21 22:47:43,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2020-12-21 22:47:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 22:47:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-21 22:47:43,798 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2020-12-21 22:47:43,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:43,798 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-21 22:47:43,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:47:43,799 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-21 22:47:43,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 22:47:43,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:43,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:43,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:47:43,801 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:43,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:43,802 INFO L82 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2020-12-21 22:47:43,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:43,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749813718] [2020-12-21 22:47:43,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:47:43,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749813718] [2020-12-21 22:47:43,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969168311] [2020-12-21 22:47:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 22:47:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:44,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:47:44,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:47:44,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:44,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 22:47:44,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152783847] [2020-12-21 22:47:44,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:47:44,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:44,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:47:44,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:47:44,135 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2020-12-21 22:47:44,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:44,208 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-12-21 22:47:44,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:47:44,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-21 22:47:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:44,210 INFO L225 Difference]: With dead ends: 45 [2020-12-21 22:47:44,210 INFO L226 Difference]: Without dead ends: 34 [2020-12-21 22:47:44,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:47:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-21 22:47:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2020-12-21 22:47:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-21 22:47:44,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-21 22:47:44,219 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2020-12-21 22:47:44,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:44,219 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-21 22:47:44,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:47:44,220 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-21 22:47:44,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 22:47:44,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:44,221 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:44,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 22:47:44,435 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:44,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:44,437 INFO L82 PathProgramCache]: Analyzing trace with hash -799235507, now seen corresponding path program 2 times [2020-12-21 22:47:44,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:44,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492728976] [2020-12-21 22:47:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:47:44,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492728976] [2020-12-21 22:47:44,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191280088] [2020-12-21 22:47:44,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 22:47:44,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:47:44,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:44,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:47:44,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:47:44,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:44,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 22:47:44,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750562345] [2020-12-21 22:47:44,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:47:44,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:44,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:47:44,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:47:44,734 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-12-21 22:47:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:44,825 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-12-21 22:47:44,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:47:44,827 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-21 22:47:44,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:44,828 INFO L225 Difference]: With dead ends: 57 [2020-12-21 22:47:44,828 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 22:47:44,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:47:44,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 22:47:44,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 24. [2020-12-21 22:47:44,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 22:47:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-21 22:47:44,836 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-12-21 22:47:44,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:44,837 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-21 22:47:44,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:47:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-21 22:47:44,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:47:44,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:44,839 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:45,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:45,054 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:45,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:45,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1303246583, now seen corresponding path program 3 times [2020-12-21 22:47:45,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:45,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899409112] [2020-12-21 22:47:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 22:47:45,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899409112] [2020-12-21 22:47:45,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527015132] [2020-12-21 22:47:45,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 22:47:45,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:47:45,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:45,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:47:45,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 22:47:45,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:45,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 22:47:45,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11622453] [2020-12-21 22:47:45,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:47:45,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:45,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:47:45,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:47:45,282 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-12-21 22:47:45,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:45,390 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-12-21 22:47:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:47:45,391 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-12-21 22:47:45,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:45,393 INFO L225 Difference]: With dead ends: 69 [2020-12-21 22:47:45,393 INFO L226 Difference]: Without dead ends: 54 [2020-12-21 22:47:45,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:47:45,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-21 22:47:45,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 28. [2020-12-21 22:47:45,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 22:47:45,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-21 22:47:45,402 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2020-12-21 22:47:45,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:45,403 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-21 22:47:45,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:47:45,403 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-21 22:47:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 22:47:45,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:45,404 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:45,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:45,620 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:45,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:45,622 INFO L82 PathProgramCache]: Analyzing trace with hash -318070331, now seen corresponding path program 4 times [2020-12-21 22:47:45,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:45,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880371363] [2020-12-21 22:47:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-21 22:47:45,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880371363] [2020-12-21 22:47:45,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841468889] [2020-12-21 22:47:45,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 22:47:45,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:47:45,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:45,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:47:45,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-21 22:47:45,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:45,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 22:47:45,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704059711] [2020-12-21 22:47:45,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:47:45,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:45,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:47:45,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:47:45,884 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-12-21 22:47:45,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:45,988 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-12-21 22:47:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:47:45,989 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-12-21 22:47:45,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:45,990 INFO L225 Difference]: With dead ends: 81 [2020-12-21 22:47:45,991 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 22:47:45,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:47:45,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 22:47:45,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2020-12-21 22:47:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 22:47:45,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-21 22:47:45,998 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2020-12-21 22:47:45,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:45,999 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-21 22:47:45,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:47:45,999 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-21 22:47:46,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 22:47:46,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:46,000 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:46,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:46,215 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:46,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2015456385, now seen corresponding path program 5 times [2020-12-21 22:47:46,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:46,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487184259] [2020-12-21 22:47:46,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-21 22:47:46,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487184259] [2020-12-21 22:47:46,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012252327] [2020-12-21 22:47:46,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 22:47:47,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 22:47:47,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:47,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:47:47,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-21 22:47:47,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:47,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 22:47:47,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749140572] [2020-12-21 22:47:47,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:47:47,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:47,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:47:47,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:47:47,386 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2020-12-21 22:47:47,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:47,503 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2020-12-21 22:47:47,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:47:47,504 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-21 22:47:47,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:47,505 INFO L225 Difference]: With dead ends: 93 [2020-12-21 22:47:47,505 INFO L226 Difference]: Without dead ends: 74 [2020-12-21 22:47:47,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:47:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-21 22:47:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 36. [2020-12-21 22:47:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 22:47:47,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-21 22:47:47,513 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2020-12-21 22:47:47,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:47,513 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-21 22:47:47,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:47:47,514 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-21 22:47:47,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 22:47:47,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:47,515 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:47,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 22:47:47,729 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:47,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:47,730 INFO L82 PathProgramCache]: Analyzing trace with hash -189699779, now seen corresponding path program 6 times [2020-12-21 22:47:47,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:47,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220198851] [2020-12-21 22:47:47,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 22:47:47,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220198851] [2020-12-21 22:47:47,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043125911] [2020-12-21 22:47:47,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 22:47:48,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 22:47:48,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:48,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:47:48,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 22:47:48,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:48,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 22:47:48,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861721102] [2020-12-21 22:47:48,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:47:48,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:48,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:47:48,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:47:48,464 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2020-12-21 22:47:48,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:48,593 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2020-12-21 22:47:48,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:47:48,593 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-12-21 22:47:48,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:48,594 INFO L225 Difference]: With dead ends: 105 [2020-12-21 22:47:48,595 INFO L226 Difference]: Without dead ends: 84 [2020-12-21 22:47:48,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:47:48,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-21 22:47:48,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 40. [2020-12-21 22:47:48,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 22:47:48,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-21 22:47:48,602 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2020-12-21 22:47:48,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:48,603 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-21 22:47:48,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:47:48,603 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-21 22:47:48,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-21 22:47:48,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:48,604 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:48,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:48,819 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:48,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:48,820 INFO L82 PathProgramCache]: Analyzing trace with hash 760584185, now seen corresponding path program 7 times [2020-12-21 22:47:48,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:48,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291903993] [2020-12-21 22:47:48,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-21 22:47:48,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291903993] [2020-12-21 22:47:48,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140283976] [2020-12-21 22:47:48,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 22:47:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:49,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:47:49,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-21 22:47:49,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:49,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 22:47:49,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753776899] [2020-12-21 22:47:49,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:47:49,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:49,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:47:49,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:47:49,095 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 11 states. [2020-12-21 22:47:49,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:49,277 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2020-12-21 22:47:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:47:49,278 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-12-21 22:47:49,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:49,283 INFO L225 Difference]: With dead ends: 117 [2020-12-21 22:47:49,284 INFO L226 Difference]: Without dead ends: 94 [2020-12-21 22:47:49,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:47:49,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-21 22:47:49,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 44. [2020-12-21 22:47:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 22:47:49,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-21 22:47:49,305 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-12-21 22:47:49,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:49,308 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-21 22:47:49,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:47:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-21 22:47:49,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 22:47:49,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:49,313 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:49,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:49,528 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:49,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1775699787, now seen corresponding path program 8 times [2020-12-21 22:47:49,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:49,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842330256] [2020-12-21 22:47:49,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-21 22:47:49,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842330256] [2020-12-21 22:47:49,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349883790] [2020-12-21 22:47:49,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 22:47:49,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:47:49,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:49,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:47:49,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-21 22:47:49,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:49,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 22:47:49,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970447081] [2020-12-21 22:47:49,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:47:49,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:49,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:47:49,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:47:49,924 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-12-21 22:47:50,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:50,090 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2020-12-21 22:47:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:47:50,091 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-12-21 22:47:50,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:50,092 INFO L225 Difference]: With dead ends: 129 [2020-12-21 22:47:50,092 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 22:47:50,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:47:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 22:47:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 48. [2020-12-21 22:47:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 22:47:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-21 22:47:50,100 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 41 [2020-12-21 22:47:50,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:50,100 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-21 22:47:50,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:47:50,100 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-21 22:47:50,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 22:47:50,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:50,101 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:50,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 22:47:50,315 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:50,317 INFO L82 PathProgramCache]: Analyzing trace with hash -859403407, now seen corresponding path program 9 times [2020-12-21 22:47:50,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:50,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770411693] [2020-12-21 22:47:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-21 22:47:50,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770411693] [2020-12-21 22:47:50,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856928949] [2020-12-21 22:47:50,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 22:48:25,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 22:48:25,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:25,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:48:25,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-21 22:48:25,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:25,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 22:48:25,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961003568] [2020-12-21 22:48:25,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:48:25,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:25,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:48:25,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:48:25,174 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 13 states. [2020-12-21 22:48:25,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:25,313 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2020-12-21 22:48:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:48:25,313 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-12-21 22:48:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:25,314 INFO L225 Difference]: With dead ends: 141 [2020-12-21 22:48:25,314 INFO L226 Difference]: Without dead ends: 114 [2020-12-21 22:48:25,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:48:25,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-21 22:48:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 52. [2020-12-21 22:48:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 22:48:25,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-12-21 22:48:25,321 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2020-12-21 22:48:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:25,321 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-12-21 22:48:25,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:48:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-12-21 22:48:25,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:48:25,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:25,322 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:25,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:48:25,537 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:25,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:25,538 INFO L82 PathProgramCache]: Analyzing trace with hash 407457837, now seen corresponding path program 10 times [2020-12-21 22:48:25,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:25,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157453782] [2020-12-21 22:48:25,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-21 22:48:25,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157453782] [2020-12-21 22:48:25,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149684448] [2020-12-21 22:48:25,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 22:48:25,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:48:25,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:25,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:48:25,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-21 22:48:25,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:25,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 22:48:25,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647687935] [2020-12-21 22:48:25,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:48:25,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:25,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:48:25,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:48:25,915 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 14 states. [2020-12-21 22:48:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:26,072 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2020-12-21 22:48:26,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:48:26,073 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-12-21 22:48:26,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:26,074 INFO L225 Difference]: With dead ends: 153 [2020-12-21 22:48:26,074 INFO L226 Difference]: Without dead ends: 124 [2020-12-21 22:48:26,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:48:26,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-21 22:48:26,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 56. [2020-12-21 22:48:26,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 22:48:26,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-12-21 22:48:26,081 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2020-12-21 22:48:26,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:26,081 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-12-21 22:48:26,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:48:26,081 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-12-21 22:48:26,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 22:48:26,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:26,082 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:26,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:48:26,296 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:26,297 INFO L82 PathProgramCache]: Analyzing trace with hash -380877079, now seen corresponding path program 11 times [2020-12-21 22:48:26,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:26,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247649421] [2020-12-21 22:48:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-21 22:48:26,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247649421] [2020-12-21 22:48:26,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201479803] [2020-12-21 22:48:26,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true