/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:05:39,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:05:39,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:05:39,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:05:39,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:05:39,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:05:39,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:05:39,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:05:39,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:05:39,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:05:39,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:05:39,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:05:39,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:05:39,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:05:39,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:05:39,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:05:39,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:05:39,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:05:39,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:05:39,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:05:39,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:05:39,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:05:39,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:05:39,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:05:39,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:05:39,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:05:39,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:05:39,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:05:39,662 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 11:05:39,709 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:05:39,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:05:39,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:05:39,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:05:39,715 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:05:39,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:05:39,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:05:39,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:05:39,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:05:39,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:05:39,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:05:39,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:05:39,717 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:05:39,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:05:39,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:05:39,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:05:39,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:05:39,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:05:39,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:05:39,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:05:39,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:05:39,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:05:39,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:05:39,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:05:39,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:05:39,720 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:05:40,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:05:40,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:05:40,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:05:40,131 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:05:40,132 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:05:40,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/partial_lesser_bound-1.i [2021-01-06 11:05:40,223 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2c22bb2de/07ad3ff46a134a9e89fa089f4f5ae4a5/FLAG5f9d457ee [2021-01-06 11:05:40,922 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:05:40,923 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-lopstr16/partial_lesser_bound-1.i [2021-01-06 11:05:40,930 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2c22bb2de/07ad3ff46a134a9e89fa089f4f5ae4a5/FLAG5f9d457ee [2021-01-06 11:05:40,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2c22bb2de/07ad3ff46a134a9e89fa089f4f5ae4a5 [2021-01-06 11:05:40,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:05:40,950 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:05:40,952 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:05:40,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:05:40,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:05:40,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:05:40" (1/1) ... [2021-01-06 11:05:40,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba26d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:40, skipping insertion in model container [2021-01-06 11:05:40,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:05:40" (1/1) ... [2021-01-06 11:05:40,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:05:40,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:05:41,124 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/array-lopstr16/partial_lesser_bound-1.i[822,835] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,GLOBAL]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,GLOBAL]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] [2021-01-06 11:05:41,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:05:41,167 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:05:41,183 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/array-lopstr16/partial_lesser_bound-1.i[822,835] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,GLOBAL]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,GLOBAL]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] [2021-01-06 11:05:41,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:05:41,218 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:05:41,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:41 WrapperNode [2021-01-06 11:05:41,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:05:41,221 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:05:41,221 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:05:41,221 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:05:41,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:41" (1/1) ... [2021-01-06 11:05:41,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:41" (1/1) ... [2021-01-06 11:05:41,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:05:41,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:05:41,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:05:41,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:05:41,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:41" (1/1) ... [2021-01-06 11:05:41,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:41" (1/1) ... [2021-01-06 11:05:41,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:41" (1/1) ... [2021-01-06 11:05:41,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:41" (1/1) ... [2021-01-06 11:05:41,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:41" (1/1) ... [2021-01-06 11:05:41,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:41" (1/1) ... [2021-01-06 11:05:41,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:41" (1/1) ... [2021-01-06 11:05:41,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:05:41,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:05:41,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:05:41,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:05:41,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:41" (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 11:05:41,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:05:41,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:05:41,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 11:05:41,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:05:41,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:05:41,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 11:05:41,835 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:05:41,836 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 11:05:41,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:05:41 BoogieIcfgContainer [2021-01-06 11:05:41,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:05:41,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:05:41,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:05:41,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:05:41,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:05:40" (1/3) ... [2021-01-06 11:05:41,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f88d495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:05:41, skipping insertion in model container [2021-01-06 11:05:41,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:41" (2/3) ... [2021-01-06 11:05:41,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f88d495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:05:41, skipping insertion in model container [2021-01-06 11:05:41,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:05:41" (3/3) ... [2021-01-06 11:05:41,847 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_lesser_bound-1.i [2021-01-06 11:05:41,854 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:05:41,859 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:05:41,881 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:05:41,910 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:05:41,910 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:05:41,910 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:05:41,910 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:05:41,911 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:05:41,911 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:05:41,911 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:05:41,911 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:05:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-01-06 11:05:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 11:05:41,956 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:41,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:41,957 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:41,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:41,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2021-01-06 11:05:41,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:41,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947751180] [2021-01-06 11:05:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:42,158 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 11:05:42,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947751180] [2021-01-06 11:05:42,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:05:42,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:05:42,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100992264] [2021-01-06 11:05:42,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:05:42,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:42,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:05:42,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:05:42,185 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2021-01-06 11:05:42,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:42,280 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2021-01-06 11:05:42,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:05:42,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 11:05:42,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:42,292 INFO L225 Difference]: With dead ends: 42 [2021-01-06 11:05:42,292 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 11:05:42,295 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 11:05:42,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 11:05:42,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2021-01-06 11:05:42,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 11:05:42,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-01-06 11:05:42,335 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2021-01-06 11:05:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:42,335 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-01-06 11:05:42,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:05:42,335 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-01-06 11:05:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 11:05:42,336 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:42,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:42,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:05:42,337 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:42,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2021-01-06 11:05:42,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:42,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887508267] [2021-01-06 11:05:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:05:42,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887508267] [2021-01-06 11:05:42,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604510582] [2021-01-06 11:05:42,420 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 11:05:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:42,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 11:05:42,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:05:42,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:42,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 11:05:42,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993686150] [2021-01-06 11:05:42,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 11:05:42,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:42,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 11:05:42,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:05:42,601 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2021-01-06 11:05:42,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:42,658 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-01-06 11:05:42,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:05:42,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-01-06 11:05:42,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:42,660 INFO L225 Difference]: With dead ends: 45 [2021-01-06 11:05:42,660 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 11:05:42,661 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 [2021-01-06 11:05:42,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 11:05:42,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2021-01-06 11:05:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 11:05:42,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-01-06 11:05:42,667 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2021-01-06 11:05:42,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:42,668 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-01-06 11:05:42,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 11:05:42,668 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-01-06 11:05:42,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 11:05:42,669 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:42,669 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:42,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 11:05:42,883 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:42,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:42,885 INFO L82 PathProgramCache]: Analyzing trace with hash -799235507, now seen corresponding path program 2 times [2021-01-06 11:05:42,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:42,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39105633] [2021-01-06 11:05:42,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 11:05:42,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39105633] [2021-01-06 11:05:42,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29308725] [2021-01-06 11:05:42,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:43,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:05:43,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:43,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 11:05:43,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 11:05:43,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:43,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 11:05:43,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762091479] [2021-01-06 11:05:43,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 11:05:43,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:43,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 11:05:43,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 11:05:43,055 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2021-01-06 11:05:43,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:43,131 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-01-06 11:05:43,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 11:05:43,132 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2021-01-06 11:05:43,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:43,133 INFO L225 Difference]: With dead ends: 57 [2021-01-06 11:05:43,134 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 11:05:43,134 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 [2021-01-06 11:05:43,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 11:05:43,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 24. [2021-01-06 11:05:43,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 11:05:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-01-06 11:05:43,141 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2021-01-06 11:05:43,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:43,142 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-01-06 11:05:43,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 11:05:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-01-06 11:05:43,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 11:05:43,143 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:43,143 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:43,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:43,357 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:43,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:43,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1303246583, now seen corresponding path program 3 times [2021-01-06 11:05:43,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:43,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180459032] [2021-01-06 11:05:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 11:05:43,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180459032] [2021-01-06 11:05:43,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242214445] [2021-01-06 11:05:43,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:43,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 11:05:43,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:43,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 11:05:43,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 11:05:43,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:43,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 11:05:43,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634055049] [2021-01-06 11:05:43,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 11:05:43,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:43,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 11:05:43,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:05:43,635 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2021-01-06 11:05:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:43,730 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-01-06 11:05:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 11:05:43,730 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2021-01-06 11:05:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:43,732 INFO L225 Difference]: With dead ends: 69 [2021-01-06 11:05:43,732 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 11:05:43,733 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 [2021-01-06 11:05:43,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 11:05:43,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 28. [2021-01-06 11:05:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 11:05:43,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 11:05:43,740 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2021-01-06 11:05:43,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:43,740 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 11:05:43,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 11:05:43,740 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 11:05:43,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 11:05:43,741 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:43,742 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:43,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:43,958 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:43,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:43,959 INFO L82 PathProgramCache]: Analyzing trace with hash -318070331, now seen corresponding path program 4 times [2021-01-06 11:05:43,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:43,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477640332] [2021-01-06 11:05:43,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 11:05:44,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477640332] [2021-01-06 11:05:44,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940982054] [2021-01-06 11:05:44,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:44,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:05:44,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:44,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:05:44,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 11:05:44,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:44,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 11:05:44,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512743541] [2021-01-06 11:05:44,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 11:05:44,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:44,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 11:05:44,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:05:44,203 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2021-01-06 11:05:44,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:44,289 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-01-06 11:05:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 11:05:44,290 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2021-01-06 11:05:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:44,291 INFO L225 Difference]: With dead ends: 81 [2021-01-06 11:05:44,291 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 11:05:44,292 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 [2021-01-06 11:05:44,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 11:05:44,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2021-01-06 11:05:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 11:05:44,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-01-06 11:05:44,299 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2021-01-06 11:05:44,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:44,299 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-01-06 11:05:44,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 11:05:44,300 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-01-06 11:05:44,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 11:05:44,301 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:44,301 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:44,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:44,513 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:44,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:44,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2015456385, now seen corresponding path program 5 times [2021-01-06 11:05:44,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:44,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642260559] [2021-01-06 11:05:44,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 11:05:44,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642260559] [2021-01-06 11:05:44,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373349900] [2021-01-06 11:05:44,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:44,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 11:05:44,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:44,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 11:05:44,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 11:05:44,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:44,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 11:05:44,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545436944] [2021-01-06 11:05:44,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:05:44,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:44,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:05:44,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:05:44,760 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2021-01-06 11:05:44,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:44,868 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2021-01-06 11:05:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 11:05:44,869 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2021-01-06 11:05:44,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:44,870 INFO L225 Difference]: With dead ends: 93 [2021-01-06 11:05:44,870 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 11:05:44,871 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 [2021-01-06 11:05:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 11:05:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 36. [2021-01-06 11:05:44,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 11:05:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-01-06 11:05:44,878 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2021-01-06 11:05:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:44,879 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-01-06 11:05:44,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:05:44,879 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-01-06 11:05:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 11:05:44,880 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:44,880 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:45,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 11:05:45,096 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:45,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:45,097 INFO L82 PathProgramCache]: Analyzing trace with hash -189699779, now seen corresponding path program 6 times [2021-01-06 11:05:45,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:45,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004805778] [2021-01-06 11:05:45,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 11:05:45,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004805778] [2021-01-06 11:05:45,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259600169] [2021-01-06 11:05:45,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:45,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 11:05:45,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:45,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 11:05:45,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 11:05:45,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:45,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 11:05:45,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399275998] [2021-01-06 11:05:45,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:05:45,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:45,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:05:45,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:05:45,417 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2021-01-06 11:05:45,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:45,524 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2021-01-06 11:05:45,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:05:45,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2021-01-06 11:05:45,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:45,526 INFO L225 Difference]: With dead ends: 105 [2021-01-06 11:05:45,526 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 11:05:45,527 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 [2021-01-06 11:05:45,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 11:05:45,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 40. [2021-01-06 11:05:45,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 11:05:45,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-01-06 11:05:45,534 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2021-01-06 11:05:45,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:45,534 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-01-06 11:05:45,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:05:45,534 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-01-06 11:05:45,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 11:05:45,535 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:45,536 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:45,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:45,750 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:45,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:45,752 INFO L82 PathProgramCache]: Analyzing trace with hash 760584185, now seen corresponding path program 7 times [2021-01-06 11:05:45,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:45,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778988001] [2021-01-06 11:05:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 11:05:45,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778988001] [2021-01-06 11:05:45,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72944159] [2021-01-06 11:05:45,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:45,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 11:05:45,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 11:05:45,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:45,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 11:05:45,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404356750] [2021-01-06 11:05:45,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 11:05:45,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:45,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 11:05:45,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:05:45,975 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 11 states. [2021-01-06 11:05:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:46,082 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2021-01-06 11:05:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:05:46,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2021-01-06 11:05:46,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:46,084 INFO L225 Difference]: With dead ends: 117 [2021-01-06 11:05:46,084 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 11:05:46,085 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 [2021-01-06 11:05:46,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 11:05:46,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 44. [2021-01-06 11:05:46,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 11:05:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-01-06 11:05:46,091 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2021-01-06 11:05:46,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:46,092 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-01-06 11:05:46,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 11:05:46,092 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-01-06 11:05:46,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 11:05:46,093 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:46,093 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:46,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:46,308 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:46,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1775699787, now seen corresponding path program 8 times [2021-01-06 11:05:46,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:46,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227818427] [2021-01-06 11:05:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 11:05:46,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227818427] [2021-01-06 11:05:46,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651274467] [2021-01-06 11:05:46,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:46,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:05:46,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:46,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 11:05:46,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 11:05:46,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:46,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 11:05:46,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452108881] [2021-01-06 11:05:46,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 11:05:46,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:46,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 11:05:46,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 11:05:46,574 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2021-01-06 11:05:46,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:46,708 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2021-01-06 11:05:46,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 11:05:46,709 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2021-01-06 11:05:46,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:46,710 INFO L225 Difference]: With dead ends: 129 [2021-01-06 11:05:46,710 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 11:05:46,710 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 [2021-01-06 11:05:46,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 11:05:46,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 48. [2021-01-06 11:05:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 11:05:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-01-06 11:05:46,718 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 41 [2021-01-06 11:05:46,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:46,718 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-01-06 11:05:46,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 11:05:46,718 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-01-06 11:05:46,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 11:05:46,719 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:46,719 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:46,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 11:05:46,933 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:46,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:46,934 INFO L82 PathProgramCache]: Analyzing trace with hash -859403407, now seen corresponding path program 9 times [2021-01-06 11:05:46,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:46,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30750311] [2021-01-06 11:05:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 11:05:47,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30750311] [2021-01-06 11:05:47,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707017480] [2021-01-06 11:05:47,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:47,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 11:05:47,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:47,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 11:05:47,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 11:05:47,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:47,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 11:05:47,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151349214] [2021-01-06 11:05:47,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 11:05:47,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:47,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 11:05:47,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:05:47,461 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 13 states. [2021-01-06 11:05:47,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:47,586 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2021-01-06 11:05:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 11:05:47,586 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2021-01-06 11:05:47,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:47,587 INFO L225 Difference]: With dead ends: 141 [2021-01-06 11:05:47,588 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 11:05:47,588 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 [2021-01-06 11:05:47,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 11:05:47,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 52. [2021-01-06 11:05:47,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 11:05:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-01-06 11:05:47,595 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2021-01-06 11:05:47,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:47,595 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-01-06 11:05:47,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 11:05:47,596 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-01-06 11:05:47,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 11:05:47,597 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:47,597 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:47,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:47,811 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:47,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:47,812 INFO L82 PathProgramCache]: Analyzing trace with hash 407457837, now seen corresponding path program 10 times [2021-01-06 11:05:47,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:47,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424133477] [2021-01-06 11:05:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 11:05:47,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424133477] [2021-01-06 11:05:47,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56774463] [2021-01-06 11:05:47,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:48,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:05:48,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:48,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 11:05:48,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 11:05:48,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:48,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 11:05:48,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800518992] [2021-01-06 11:05:48,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 11:05:48,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:48,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 11:05:48,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:05:48,088 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 14 states. [2021-01-06 11:05:48,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:48,213 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2021-01-06 11:05:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 11:05:48,215 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2021-01-06 11:05:48,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:48,216 INFO L225 Difference]: With dead ends: 153 [2021-01-06 11:05:48,216 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 11:05:48,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:05:48,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 11:05:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 56. [2021-01-06 11:05:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 11:05:48,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-01-06 11:05:48,223 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2021-01-06 11:05:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:48,224 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-01-06 11:05:48,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 11:05:48,224 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-01-06 11:05:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 11:05:48,225 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:48,225 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:48,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:48,439 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:48,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:48,439 INFO L82 PathProgramCache]: Analyzing trace with hash -380877079, now seen corresponding path program 11 times [2021-01-06 11:05:48,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:48,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185414100] [2021-01-06 11:05:48,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 11:05:48,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185414100] [2021-01-06 11:05:48,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927196625] [2021-01-06 11:05:48,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:49,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 11:05:49,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:49,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 11:05:49,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 11:05:49,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:49,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 11:05:49,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124737032] [2021-01-06 11:05:49,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 11:05:49,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:49,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 11:05:49,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:05:49,260 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 15 states. [2021-01-06 11:05:49,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:49,415 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2021-01-06 11:05:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 11:05:49,416 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2021-01-06 11:05:49,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:49,417 INFO L225 Difference]: With dead ends: 165 [2021-01-06 11:05:49,417 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 11:05:49,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:05:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 11:05:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 60. [2021-01-06 11:05:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 11:05:49,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-01-06 11:05:49,424 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2021-01-06 11:05:49,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:49,425 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-01-06 11:05:49,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 11:05:49,425 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-01-06 11:05:49,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 11:05:49,426 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:49,426 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:49,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 11:05:49,641 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:49,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:49,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1508536229, now seen corresponding path program 12 times [2021-01-06 11:05:49,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:49,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264938767] [2021-01-06 11:05:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 11:05:49,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264938767] [2021-01-06 11:05:49,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263311219] [2021-01-06 11:05:49,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:51,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 11:05:51,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:51,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 11:05:51,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 11:05:51,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:51,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 11:05:51,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493717367] [2021-01-06 11:05:51,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 11:05:51,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:51,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 11:05:51,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:05:51,176 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 16 states. [2021-01-06 11:05:51,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:51,310 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2021-01-06 11:05:51,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 11:05:51,310 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2021-01-06 11:05:51,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:51,311 INFO L225 Difference]: With dead ends: 177 [2021-01-06 11:05:51,312 INFO L226 Difference]: Without dead ends: 144 [2021-01-06 11:05:51,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:05:51,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-01-06 11:05:51,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 64. [2021-01-06 11:05:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 11:05:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-01-06 11:05:51,332 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2021-01-06 11:05:51,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:51,333 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-01-06 11:05:51,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 11:05:51,333 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-01-06 11:05:51,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 11:05:51,337 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:51,337 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:51,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 11:05:51,544 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:51,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:51,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1380005279, now seen corresponding path program 13 times [2021-01-06 11:05:51,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:51,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045722321] [2021-01-06 11:05:51,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 11:05:51,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045722321] [2021-01-06 11:05:51,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173878064] [2021-01-06 11:05:51,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:51,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 11:05:51,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 11:05:51,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:51,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 11:05:51,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251282247] [2021-01-06 11:05:51,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 11:05:51,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:51,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 11:05:51,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:05:51,903 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2021-01-06 11:05:52,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:52,086 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2021-01-06 11:05:52,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 11:05:52,087 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2021-01-06 11:05:52,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:52,089 INFO L225 Difference]: With dead ends: 189 [2021-01-06 11:05:52,089 INFO L226 Difference]: Without dead ends: 154 [2021-01-06 11:05:52,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:05:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-01-06 11:05:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 68. [2021-01-06 11:05:52,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 11:05:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-01-06 11:05:52,097 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2021-01-06 11:05:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:52,097 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-01-06 11:05:52,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 11:05:52,097 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-01-06 11:05:52,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 11:05:52,098 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:52,099 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:52,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 11:05:52,312 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:52,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:52,313 INFO L82 PathProgramCache]: Analyzing trace with hash -773564643, now seen corresponding path program 14 times [2021-01-06 11:05:52,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:52,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510021149] [2021-01-06 11:05:52,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 11:05:52,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510021149] [2021-01-06 11:05:52,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080437546] [2021-01-06 11:05:52,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:52,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:05:52,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:52,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 11:05:52,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 11:05:52,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:52,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 11:05:52,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785402511] [2021-01-06 11:05:52,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 11:05:52,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:52,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 11:05:52,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:05:52,649 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 18 states. [2021-01-06 11:05:52,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:52,829 INFO L93 Difference]: Finished difference Result 201 states and 206 transitions. [2021-01-06 11:05:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 11:05:52,830 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2021-01-06 11:05:52,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:52,832 INFO L225 Difference]: With dead ends: 201 [2021-01-06 11:05:52,832 INFO L226 Difference]: Without dead ends: 164 [2021-01-06 11:05:52,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:05:52,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-01-06 11:05:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 72. [2021-01-06 11:05:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 11:05:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-01-06 11:05:52,838 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2021-01-06 11:05:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:52,838 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-01-06 11:05:52,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 11:05:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-01-06 11:05:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 11:05:52,839 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:52,839 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:53,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:53,053 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:53,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:53,054 INFO L82 PathProgramCache]: Analyzing trace with hash -587852327, now seen corresponding path program 15 times [2021-01-06 11:05:53,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:53,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826801056] [2021-01-06 11:05:53,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 11:05:53,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826801056] [2021-01-06 11:05:53,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695194899] [2021-01-06 11:05:53,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:54,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 11:05:54,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:54,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 11:05:54,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 11:05:54,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:54,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 11:05:54,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703632459] [2021-01-06 11:05:54,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 11:05:54,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:54,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 11:05:54,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:05:54,760 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 19 states. [2021-01-06 11:05:54,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:54,944 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2021-01-06 11:05:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 11:05:54,944 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2021-01-06 11:05:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:54,946 INFO L225 Difference]: With dead ends: 213 [2021-01-06 11:05:54,946 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 11:05:54,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:05:54,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 11:05:54,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 76. [2021-01-06 11:05:54,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 11:05:54,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2021-01-06 11:05:54,952 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2021-01-06 11:05:54,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:54,952 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2021-01-06 11:05:54,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 11:05:54,953 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2021-01-06 11:05:54,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 11:05:54,953 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:54,954 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:55,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 11:05:55,168 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:55,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:55,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1894840683, now seen corresponding path program 16 times [2021-01-06 11:05:55,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:55,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122296535] [2021-01-06 11:05:55,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 11:05:55,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122296535] [2021-01-06 11:05:55,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563056624] [2021-01-06 11:05:55,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:55,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:05:55,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:55,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 11:05:55,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 11:05:55,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:55,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 11:05:55,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618307249] [2021-01-06 11:05:55,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 11:05:55,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:55,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 11:05:55,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:05:55,617 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 20 states. [2021-01-06 11:05:55,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:55,797 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2021-01-06 11:05:55,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 11:05:55,797 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 73 [2021-01-06 11:05:55,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:55,798 INFO L225 Difference]: With dead ends: 225 [2021-01-06 11:05:55,799 INFO L226 Difference]: Without dead ends: 184 [2021-01-06 11:05:55,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:05:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-01-06 11:05:55,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 80. [2021-01-06 11:05:55,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 11:05:55,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-01-06 11:05:55,804 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2021-01-06 11:05:55,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:55,805 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-01-06 11:05:55,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 11:05:55,805 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-01-06 11:05:55,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 11:05:55,806 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:55,806 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:56,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 11:05:56,021 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:56,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:56,022 INFO L82 PathProgramCache]: Analyzing trace with hash -775280303, now seen corresponding path program 17 times [2021-01-06 11:05:56,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:56,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695773192] [2021-01-06 11:05:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 11:05:56,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695773192] [2021-01-06 11:05:56,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278957045] [2021-01-06 11:05:56,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:19,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 11:06:19,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:19,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 11:06:19,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 11:06:19,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:19,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 11:06:19,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848422157] [2021-01-06 11:06:19,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 11:06:19,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:19,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 11:06:19,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 11:06:19,997 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 21 states. [2021-01-06 11:06:20,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:20,206 INFO L93 Difference]: Finished difference Result 237 states and 242 transitions. [2021-01-06 11:06:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 11:06:20,206 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 77 [2021-01-06 11:06:20,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:20,208 INFO L225 Difference]: With dead ends: 237 [2021-01-06 11:06:20,208 INFO L226 Difference]: Without dead ends: 194 [2021-01-06 11:06:20,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 11:06:20,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-01-06 11:06:20,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 84. [2021-01-06 11:06:20,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 11:06:20,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2021-01-06 11:06:20,213 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 77 [2021-01-06 11:06:20,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:20,213 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2021-01-06 11:06:20,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 11:06:20,213 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2021-01-06 11:06:20,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 11:06:20,214 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:20,214 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:20,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 11:06:20,416 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:20,417 INFO L82 PathProgramCache]: Analyzing trace with hash 943881741, now seen corresponding path program 18 times [2021-01-06 11:06:20,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:20,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725761970] [2021-01-06 11:06:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 11:06:20,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725761970] [2021-01-06 11:06:20,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921112547] [2021-01-06 11:06:20,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:28,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 11:06:28,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:28,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 11:06:28,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 11:06:28,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:28,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 11:06:28,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348112061] [2021-01-06 11:06:28,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 11:06:28,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:28,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 11:06:28,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 11:06:28,770 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 22 states. [2021-01-06 11:06:28,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:28,991 INFO L93 Difference]: Finished difference Result 249 states and 254 transitions. [2021-01-06 11:06:28,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 11:06:28,991 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 81 [2021-01-06 11:06:28,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:28,993 INFO L225 Difference]: With dead ends: 249 [2021-01-06 11:06:28,993 INFO L226 Difference]: Without dead ends: 204 [2021-01-06 11:06:28,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 11:06:28,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-01-06 11:06:28,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 88. [2021-01-06 11:06:28,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 11:06:28,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-01-06 11:06:28,997 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 81 [2021-01-06 11:06:28,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:28,997 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-01-06 11:06:28,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 11:06:28,998 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-01-06 11:06:28,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-01-06 11:06:28,998 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:28,999 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:29,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:29,213 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:29,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:29,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2131952841, now seen corresponding path program 19 times [2021-01-06 11:06:29,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:29,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391655641] [2021-01-06 11:06:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-01-06 11:06:29,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391655641] [2021-01-06 11:06:29,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369780015] [2021-01-06 11:06:29,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:29,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:29,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 11:06:29,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-01-06 11:06:29,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:29,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 11:06:29,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729094723] [2021-01-06 11:06:29,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 11:06:29,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:29,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 11:06:29,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 11:06:29,674 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 23 states. [2021-01-06 11:06:29,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:29,932 INFO L93 Difference]: Finished difference Result 261 states and 266 transitions. [2021-01-06 11:06:29,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 11:06:29,933 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2021-01-06 11:06:29,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:29,934 INFO L225 Difference]: With dead ends: 261 [2021-01-06 11:06:29,934 INFO L226 Difference]: Without dead ends: 214 [2021-01-06 11:06:29,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 11:06:29,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-01-06 11:06:29,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 92. [2021-01-06 11:06:29,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 11:06:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2021-01-06 11:06:29,940 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 85 [2021-01-06 11:06:29,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:29,940 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2021-01-06 11:06:29,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 11:06:29,940 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2021-01-06 11:06:29,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 11:06:29,941 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:29,941 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:30,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:30,156 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:30,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:30,157 INFO L82 PathProgramCache]: Analyzing trace with hash 207011205, now seen corresponding path program 20 times [2021-01-06 11:06:30,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:30,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958267810] [2021-01-06 11:06:30,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 11:06:30,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958267810] [2021-01-06 11:06:30,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798551153] [2021-01-06 11:06:30,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:30,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:06:30,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:30,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 11:06:30,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 11:06:30,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:30,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 11:06:30,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229197189] [2021-01-06 11:06:30,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 11:06:30,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:30,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 11:06:30,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 11:06:30,674 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 24 states. [2021-01-06 11:06:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:30,931 INFO L93 Difference]: Finished difference Result 273 states and 278 transitions. [2021-01-06 11:06:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 11:06:30,931 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2021-01-06 11:06:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:30,932 INFO L225 Difference]: With dead ends: 273 [2021-01-06 11:06:30,932 INFO L226 Difference]: Without dead ends: 224 [2021-01-06 11:06:30,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 11:06:30,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-01-06 11:06:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 96. [2021-01-06 11:06:30,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 11:06:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-01-06 11:06:30,937 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 89 [2021-01-06 11:06:30,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:30,937 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-01-06 11:06:30,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 11:06:30,938 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-01-06 11:06:30,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-01-06 11:06:30,938 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:30,939 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:31,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 11:06:31,150 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:31,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:31,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1873324097, now seen corresponding path program 21 times [2021-01-06 11:06:31,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:31,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007734537] [2021-01-06 11:06:31,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 11:06:31,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007734537] [2021-01-06 11:06:31,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891384152] [2021-01-06 11:06:31,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:36,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 11:06:36,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:36,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 11:06:36,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:36,598 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 11:06:36,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:36,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 11:06:36,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058553377] [2021-01-06 11:06:36,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 11:06:36,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:36,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 11:06:36,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:06:36,604 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 25 states. [2021-01-06 11:06:36,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:36,886 INFO L93 Difference]: Finished difference Result 285 states and 290 transitions. [2021-01-06 11:06:36,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 11:06:36,887 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 93 [2021-01-06 11:06:36,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:36,889 INFO L225 Difference]: With dead ends: 285 [2021-01-06 11:06:36,889 INFO L226 Difference]: Without dead ends: 234 [2021-01-06 11:06:36,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:06:36,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-01-06 11:06:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 100. [2021-01-06 11:06:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 11:06:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2021-01-06 11:06:36,894 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2021-01-06 11:06:36,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:36,894 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2021-01-06 11:06:36,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 11:06:36,894 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2021-01-06 11:06:36,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 11:06:36,895 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:36,896 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:37,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 11:06:37,110 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:37,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:37,111 INFO L82 PathProgramCache]: Analyzing trace with hash -500972291, now seen corresponding path program 22 times [2021-01-06 11:06:37,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:37,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618067629] [2021-01-06 11:06:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 11:06:37,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618067629] [2021-01-06 11:06:37,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598667968] [2021-01-06 11:06:37,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:37,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:06:37,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:37,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 11:06:37,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 11:06:37,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:37,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 11:06:37,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921205154] [2021-01-06 11:06:37,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 11:06:37,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:37,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 11:06:37,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 11:06:37,689 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 26 states. [2021-01-06 11:06:37,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:37,944 INFO L93 Difference]: Finished difference Result 297 states and 302 transitions. [2021-01-06 11:06:37,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 11:06:37,944 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 97 [2021-01-06 11:06:37,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:37,946 INFO L225 Difference]: With dead ends: 297 [2021-01-06 11:06:37,946 INFO L226 Difference]: Without dead ends: 244 [2021-01-06 11:06:37,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 11:06:37,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-01-06 11:06:37,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 104. [2021-01-06 11:06:37,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 11:06:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2021-01-06 11:06:37,951 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 97 [2021-01-06 11:06:37,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:37,952 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2021-01-06 11:06:37,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 11:06:37,952 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2021-01-06 11:06:37,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 11:06:37,953 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:37,953 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:38,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:38,168 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:38,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:38,169 INFO L82 PathProgramCache]: Analyzing trace with hash -966585415, now seen corresponding path program 23 times [2021-01-06 11:06:38,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:38,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314979423] [2021-01-06 11:06:38,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 11:06:38,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314979423] [2021-01-06 11:06:38,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624132740] [2021-01-06 11:06:38,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:09:29,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 11:09:29,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:09:29,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 11:09:29,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:09:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 11:09:29,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:09:29,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 11:09:29,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493290679] [2021-01-06 11:09:29,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 11:09:29,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:09:29,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 11:09:29,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:09:29,546 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 27 states. [2021-01-06 11:09:29,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:09:29,825 INFO L93 Difference]: Finished difference Result 309 states and 314 transitions. [2021-01-06 11:09:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 11:09:29,826 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 101 [2021-01-06 11:09:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:09:29,827 INFO L225 Difference]: With dead ends: 309 [2021-01-06 11:09:29,827 INFO L226 Difference]: Without dead ends: 254 [2021-01-06 11:09:29,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:09:29,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-01-06 11:09:29,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 108. [2021-01-06 11:09:29,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 11:09:29,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2021-01-06 11:09:29,832 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 101 [2021-01-06 11:09:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:09:29,833 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2021-01-06 11:09:29,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 11:09:29,833 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2021-01-06 11:09:29,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-01-06 11:09:29,833 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:09:29,834 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:09:30,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 11:09:30,047 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:09:30,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:09:30,048 INFO L82 PathProgramCache]: Analyzing trace with hash 679580789, now seen corresponding path program 24 times [2021-01-06 11:09:30,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:09:30,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857113047] [2021-01-06 11:09:30,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:09:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:09:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-01-06 11:09:30,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857113047] [2021-01-06 11:09:30,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147935085] [2021-01-06 11:09:30,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true