/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops/sum_array-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:40:41,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:40:41,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:40:41,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:40:41,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:40:41,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:40:41,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:40:41,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:40:41,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:40:41,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:40:41,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:40:41,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:40:41,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:40:41,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:40:41,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:40:41,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:40:41,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:40:41,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:40:41,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:40:41,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:40:41,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:40:41,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:40:41,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:40:41,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:40:41,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:40:41,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:40:41,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:40:41,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:40:41,177 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:40:41,203 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:40:41,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:40:41,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:40:41,205 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:40:41,205 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:40:41,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:40:41,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:40:41,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:40:41,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:40:41,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:40:41,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:40:41,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:40:41,207 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:40:41,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:40:41,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:40:41,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:40:41,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:40:41,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:40:41,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:40:41,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:40:41,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:40:41,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:40:41,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:40:41,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:40:41,210 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:40:41,210 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:40:41,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:40:41,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:40:41,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:40:41,610 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:40:41,611 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:40:41,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum_array-2.i [2021-01-06 16:40:41,703 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1a9ce7ed3/7e259de7ad49441890b9547d39966be2/FLAGd788e95e0 [2021-01-06 16:40:42,380 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:40:42,380 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/sum_array-2.i [2021-01-06 16:40:42,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1a9ce7ed3/7e259de7ad49441890b9547d39966be2/FLAGd788e95e0 [2021-01-06 16:40:42,405 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1a9ce7ed3/7e259de7ad49441890b9547d39966be2 [2021-01-06 16:40:42,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:40:42,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:40:42,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:40:42,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:40:42,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:40:42,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:40:42" (1/1) ... [2021-01-06 16:40:42,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79933bd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:42, skipping insertion in model container [2021-01-06 16:40:42,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:40:42" (1/1) ... [2021-01-06 16:40:42,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:40:42,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:40:42,700 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/sum_array-2.i[938,951] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~A~0,],[BinaryExpression[ARITHMOD,IdentifierExpression[~i~0,],IntegerLiteral[4294967296]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~B~0,],[BinaryExpression[ARITHMOD,IdentifierExpression[~i~0,],IntegerLiteral[4294967296]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~C~0,],[BinaryExpression[ARITHMOD,IdentifierExpression[~i~0,],IntegerLiteral[4294967296]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:40:42,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:40:42,745 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:40:42,765 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/sum_array-2.i[938,951] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMOD,IdentifierExpression[~i~0,],IntegerLiteral[4294967296]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#B~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#B~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMOD,IdentifierExpression[~i~0,],IntegerLiteral[4294967296]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#C~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#C~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMOD,IdentifierExpression[~i~0,],IntegerLiteral[4294967296]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:40:42,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:40:42,822 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:40:42,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:42 WrapperNode [2021-01-06 16:40:42,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:40:42,825 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:40:42,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:40:42,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:40:42,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:42" (1/1) ... [2021-01-06 16:40:42,858 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:42" (1/1) ... [2021-01-06 16:40:42,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:40:42,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:40:42,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:40:42,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:40:42,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:42" (1/1) ... [2021-01-06 16:40:42,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:42" (1/1) ... [2021-01-06 16:40:42,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:42" (1/1) ... [2021-01-06 16:40:42,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:42" (1/1) ... [2021-01-06 16:40:42,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:42" (1/1) ... [2021-01-06 16:40:42,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:42" (1/1) ... [2021-01-06 16:40:42,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:42" (1/1) ... [2021-01-06 16:40:42,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:40:42,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:40:42,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:40:42,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:40:42,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:40:43,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:40:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:40:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:40:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:40:43,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:40:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:40:43,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:40:43,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:40:43,576 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 16:40:43,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:40:43 BoogieIcfgContainer [2021-01-06 16:40:43,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:40:43,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:40:43,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:40:43,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:40:43,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:40:42" (1/3) ... [2021-01-06 16:40:43,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd85918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:40:43, skipping insertion in model container [2021-01-06 16:40:43,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:42" (2/3) ... [2021-01-06 16:40:43,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd85918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:40:43, skipping insertion in model container [2021-01-06 16:40:43,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:40:43" (3/3) ... [2021-01-06 16:40:43,587 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_array-2.i [2021-01-06 16:40:43,595 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:40:43,601 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:40:43,623 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:40:43,649 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:40:43,649 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:40:43,649 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:40:43,649 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:40:43,649 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:40:43,649 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:40:43,650 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:40:43,650 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:40:43,678 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-01-06 16:40:43,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:40:43,684 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:43,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:43,685 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:43,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:43,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1741268329, now seen corresponding path program 1 times [2021-01-06 16:40:43,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:43,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489083066] [2021-01-06 16:40:43,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:43,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:43,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489083066] [2021-01-06 16:40:43,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:40:43,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:40:43,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291890736] [2021-01-06 16:40:43,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:40:43,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:43,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:40:43,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:40:43,891 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2021-01-06 16:40:43,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:43,913 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2021-01-06 16:40:43,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:40:43,915 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 16:40:43,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:43,924 INFO L225 Difference]: With dead ends: 41 [2021-01-06 16:40:43,924 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 16:40:43,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:40:43,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 16:40:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 16:40:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:40:43,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-01-06 16:40:43,961 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2021-01-06 16:40:43,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:43,962 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-01-06 16:40:43,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:40:43,962 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-01-06 16:40:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:40:43,963 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:43,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:43,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:40:43,964 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:43,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:43,965 INFO L82 PathProgramCache]: Analyzing trace with hash -217285445, now seen corresponding path program 1 times [2021-01-06 16:40:43,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:43,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972716040] [2021-01-06 16:40:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:44,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:44,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972716040] [2021-01-06 16:40:44,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:40:44,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 16:40:44,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734808263] [2021-01-06 16:40:44,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:40:44,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:44,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:40:44,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:40:44,168 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 5 states. [2021-01-06 16:40:44,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:44,305 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-01-06 16:40:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:40:44,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-06 16:40:44,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:44,307 INFO L225 Difference]: With dead ends: 52 [2021-01-06 16:40:44,307 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 16:40:44,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:40:44,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 16:40:44,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2021-01-06 16:40:44,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 16:40:44,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-01-06 16:40:44,314 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 11 [2021-01-06 16:40:44,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:44,315 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-01-06 16:40:44,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:40:44,315 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-01-06 16:40:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:40:44,316 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:44,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:44,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:40:44,317 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:44,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:44,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2020776544, now seen corresponding path program 1 times [2021-01-06 16:40:44,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:44,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275296796] [2021-01-06 16:40:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:40:45,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275296796] [2021-01-06 16:40:45,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036603520] [2021-01-06 16:40:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:45,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:40:45,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:45,509 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-01-06 16:40:45,526 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:45,538 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:45,542 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:40:45,543 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:18 [2021-01-06 16:40:45,631 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:45,633 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 32 [2021-01-06 16:40:45,640 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:45,690 INFO L625 ElimStorePlain]: treesize reduction 18, result has 66.0 percent of original size [2021-01-06 16:40:45,696 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:40:45,697 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2021-01-06 16:40:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:40:45,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:45,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 16:40:45,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302312109] [2021-01-06 16:40:45,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:40:45,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:45,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:40:45,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:40:45,858 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 10 states. [2021-01-06 16:40:46,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:46,064 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-01-06 16:40:46,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:40:46,065 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2021-01-06 16:40:46,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:46,066 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:40:46,066 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 16:40:46,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:40:46,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 16:40:46,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-01-06 16:40:46,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 16:40:46,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-01-06 16:40:46,073 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2021-01-06 16:40:46,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:46,074 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-01-06 16:40:46,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:40:46,074 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-01-06 16:40:46,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:40:46,075 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:46,075 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:46,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:40:46,282 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:46,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:46,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1709087114, now seen corresponding path program 1 times [2021-01-06 16:40:46,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:46,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312559491] [2021-01-06 16:40:46,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:40:46,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312559491] [2021-01-06 16:40:46,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896927768] [2021-01-06 16:40:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:46,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:40:46,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:40:46,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:46,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-01-06 16:40:46,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628188787] [2021-01-06 16:40:46,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:40:46,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:46,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:40:46,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:40:46,606 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 9 states. [2021-01-06 16:40:46,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:46,802 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-01-06 16:40:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:40:46,802 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2021-01-06 16:40:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:46,803 INFO L225 Difference]: With dead ends: 76 [2021-01-06 16:40:46,804 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 16:40:46,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:40:46,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 16:40:46,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2021-01-06 16:40:46,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 16:40:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-01-06 16:40:46,811 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2021-01-06 16:40:46,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:46,812 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-01-06 16:40:46,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:40:46,812 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-01-06 16:40:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:40:46,813 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:46,813 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:47,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:47,028 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:47,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1108233645, now seen corresponding path program 2 times [2021-01-06 16:40:47,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:47,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580562628] [2021-01-06 16:40:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:48,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580562628] [2021-01-06 16:40:48,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232973255] [2021-01-06 16:40:48,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:48,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:40:48,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:48,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:40:48,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:48,305 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:48,306 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-01-06 16:40:48,311 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:48,318 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:48,320 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:40:48,321 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-01-06 16:40:48,402 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 16:40:48,402 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:48,410 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:48,412 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:40:48,413 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-01-06 16:40:48,456 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-01-06 16:40:48,457 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:48,467 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:48,473 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:40:48,474 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:16 [2021-01-06 16:40:48,488 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 16:40:48,489 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:48,497 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:48,499 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:40:48,499 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-01-06 16:40:48,516 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 42 [2021-01-06 16:40:48,518 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:48,530 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:48,531 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:40:48,532 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:51 [2021-01-06 16:40:48,635 INFO L348 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-01-06 16:40:48,636 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 56 [2021-01-06 16:40:48,639 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:48,652 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:48,653 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:40:48,654 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:53 [2021-01-06 16:40:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:49,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:49,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-01-06 16:40:49,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788065722] [2021-01-06 16:40:49,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:40:49,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:49,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:40:49,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:40:49,033 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 22 states. [2021-01-06 16:40:51,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:51,156 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-01-06 16:40:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:40:51,163 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2021-01-06 16:40:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:51,164 INFO L225 Difference]: With dead ends: 62 [2021-01-06 16:40:51,164 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 16:40:51,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:40:51,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 16:40:51,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2021-01-06 16:40:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 16:40:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-01-06 16:40:51,181 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 31 [2021-01-06 16:40:51,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:51,185 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-01-06 16:40:51,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:40:51,186 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-01-06 16:40:51,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:40:51,188 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:51,188 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:51,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:51,402 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:51,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:51,403 INFO L82 PathProgramCache]: Analyzing trace with hash -626687997, now seen corresponding path program 3 times [2021-01-06 16:40:51,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:51,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097859740] [2021-01-06 16:40:51,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:40:51,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097859740] [2021-01-06 16:40:51,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135295970] [2021-01-06 16:40:51,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:51,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 16:40:51,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:51,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:40:51,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:40:52,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:52,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-01-06 16:40:52,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784951734] [2021-01-06 16:40:52,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:40:52,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:52,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:40:52,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:40:52,012 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 11 states. [2021-01-06 16:40:52,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:52,316 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2021-01-06 16:40:52,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:40:52,317 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2021-01-06 16:40:52,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:52,318 INFO L225 Difference]: With dead ends: 103 [2021-01-06 16:40:52,318 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 16:40:52,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:40:52,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 16:40:52,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-01-06 16:40:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 16:40:52,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-01-06 16:40:52,328 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 35 [2021-01-06 16:40:52,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:52,331 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-01-06 16:40:52,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:40:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-01-06 16:40:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 16:40:52,332 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:52,333 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:52,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:52,547 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:52,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:52,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1732581416, now seen corresponding path program 4 times [2021-01-06 16:40:52,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:52,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732471936] [2021-01-06 16:40:52,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:53,389 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-01-06 16:40:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:54,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732471936] [2021-01-06 16:40:54,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79118107] [2021-01-06 16:40:54,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:55,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:40:55,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:55,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 16:40:55,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:55,291 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-01-06 16:40:55,293 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:55,302 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:55,303 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:40:55,303 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:18 [2021-01-06 16:40:55,688 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-01-06 16:40:55,689 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:55,705 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:55,707 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:40:55,707 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:23 [2021-01-06 16:40:55,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:40:55,841 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:40:55,841 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 50 [2021-01-06 16:40:55,844 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:55,877 INFO L625 ElimStorePlain]: treesize reduction 30, result has 63.9 percent of original size [2021-01-06 16:40:55,879 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:40:55,879 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:53 [2021-01-06 16:40:56,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:40:56,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:40:56,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:40:56,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:40:56,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:40:56,079 INFO L348 Elim1Store]: treesize reduction 54, result has 37.2 percent of original size [2021-01-06 16:40:56,079 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 108 [2021-01-06 16:40:56,083 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:56,136 INFO L625 ElimStorePlain]: treesize reduction 64, result has 59.5 percent of original size [2021-01-06 16:40:56,137 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:40:56,138 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:98, output treesize:94 [2021-01-06 16:40:56,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:40:56,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:40:56,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:40:56,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:40:56,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:40:56,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:40:56,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:40:56,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:40:56,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:40:56,379 INFO L348 Elim1Store]: treesize reduction 60, result has 40.6 percent of original size [2021-01-06 16:40:56,379 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 68 treesize of output 112 [2021-01-06 16:40:56,386 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:40:56,434 INFO L625 ElimStorePlain]: treesize reduction 58, result has 57.4 percent of original size [2021-01-06 16:40:56,435 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:40:56,435 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:82, output treesize:78 [2021-01-06 16:40:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:57,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:57,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2021-01-06 16:40:57,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054464609] [2021-01-06 16:40:57,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:40:57,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:57,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:40:57,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:40:57,118 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 40 states. [2021-01-06 16:40:58,369 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-01-06 16:40:58,582 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2021-01-06 16:40:59,034 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2021-01-06 16:40:59,303 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 66 [2021-01-06 16:40:59,655 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2021-01-06 16:40:59,934 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2021-01-06 16:41:00,483 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2021-01-06 16:41:00,993 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 73 [2021-01-06 16:41:01,387 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 69 [2021-01-06 16:41:01,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:01,741 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2021-01-06 16:41:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:41:01,742 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2021-01-06 16:41:01,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:01,743 INFO L225 Difference]: With dead ends: 128 [2021-01-06 16:41:01,743 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 16:41:01,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=586, Invalid=4384, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:41:01,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 16:41:01,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2021-01-06 16:41:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 16:41:01,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-01-06 16:41:01,757 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 43 [2021-01-06 16:41:01,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:01,758 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-01-06 16:41:01,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:41:01,758 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-01-06 16:41:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 16:41:01,760 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:01,761 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:01,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:41:01,978 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:01,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:01,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1525407304, now seen corresponding path program 5 times [2021-01-06 16:41:01,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:01,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685206196] [2021-01-06 16:41:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 16:41:02,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685206196] [2021-01-06 16:41:02,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50857964] [2021-01-06 16:41:02,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true