/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-dcfa08f [2020-12-23 06:46:26,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:46:26,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:46:26,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:46:26,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:46:26,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:46:26,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:46:26,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:46:26,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:46:26,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:46:26,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:46:26,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:46:26,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:46:26,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:46:26,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:46:26,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:46:26,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:46:26,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:46:26,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:46:26,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:46:26,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:46:26,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:46:26,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:46:26,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:46:26,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:46:26,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:46:26,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:46:26,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:46:26,301 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:46:26,366 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:46:26,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:46:26,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:46:26,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:46:26,373 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:46:26,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:46:26,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:46:26,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:46:26,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:46:26,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:46:26,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:46:26,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:46:26,378 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:46:26,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:46:26,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:46:26,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:46:26,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:46:26,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:46:26,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:46:26,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:46:26,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:46:26,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:46:26,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:46:26,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:46:26,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:46:26,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:46:26,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:46:26,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:46:26,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:46:26,884 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:46:26,885 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:46:26,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum_array-2.i [2020-12-23 06:46:26,994 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/31b01204a/0c553d0093c1430f80bf117d36f00589/FLAG215bf06ca [2020-12-23 06:46:27,664 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:46:27,665 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/sum_array-2.i [2020-12-23 06:46:27,674 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/31b01204a/0c553d0093c1430f80bf117d36f00589/FLAG215bf06ca [2020-12-23 06:46:28,034 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/31b01204a/0c553d0093c1430f80bf117d36f00589 [2020-12-23 06:46:28,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:46:28,042 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:46:28,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:46:28,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:46:28,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:46:28,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:46:28" (1/1) ... [2020-12-23 06:46:28,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@735cb952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:28, skipping insertion in model container [2020-12-23 06:46:28,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:46:28" (1/1) ... [2020-12-23 06:46:28,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:46:28,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:46:28,281 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,] [2020-12-23 06:46:28,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:46:28,320 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:46:28,339 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,] [2020-12-23 06:46:28,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:46:28,380 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:46:28,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:28 WrapperNode [2020-12-23 06:46:28,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:46:28,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:46:28,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:46:28,383 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:46:28,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:28" (1/1) ... [2020-12-23 06:46:28,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:28" (1/1) ... [2020-12-23 06:46:28,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:46:28,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:46:28,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:46:28,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:46:28,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:28" (1/1) ... [2020-12-23 06:46:28,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:28" (1/1) ... [2020-12-23 06:46:28,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:28" (1/1) ... [2020-12-23 06:46:28,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:28" (1/1) ... [2020-12-23 06:46:28,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:28" (1/1) ... [2020-12-23 06:46:28,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:28" (1/1) ... [2020-12-23 06:46:28,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:28" (1/1) ... [2020-12-23 06:46:28,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:46:28,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:46:28,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:46:28,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:46:28,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:46:28,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:46:28,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:46:28,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 06:46:28,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:46:28,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:46:28,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:46:28,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:46:29,026 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:46:29,026 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 06:46:29,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:46:29 BoogieIcfgContainer [2020-12-23 06:46:29,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:46:29,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:46:29,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:46:29,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:46:29,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:46:28" (1/3) ... [2020-12-23 06:46:29,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bc2f2c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:46:29, skipping insertion in model container [2020-12-23 06:46:29,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:28" (2/3) ... [2020-12-23 06:46:29,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bc2f2c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:46:29, skipping insertion in model container [2020-12-23 06:46:29,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:46:29" (3/3) ... [2020-12-23 06:46:29,077 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_array-2.i [2020-12-23 06:46:29,085 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:46:29,091 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:46:29,113 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:46:29,166 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:46:29,166 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:46:29,167 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:46:29,167 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:46:29,174 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:46:29,175 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:46:29,175 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:46:29,175 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:46:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-23 06:46:29,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:46:29,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:29,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:29,207 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:29,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:29,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1741268329, now seen corresponding path program 1 times [2020-12-23 06:46:29,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:29,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21874946] [2020-12-23 06:46:29,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:29,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21874946] [2020-12-23 06:46:29,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:46:29,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:46:29,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432471003] [2020-12-23 06:46:29,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:46:29,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:29,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:46:29,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:46:29,458 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-23 06:46:29,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:29,483 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2020-12-23 06:46:29,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:46:29,485 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 06:46:29,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:29,497 INFO L225 Difference]: With dead ends: 41 [2020-12-23 06:46:29,498 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 06:46:29,502 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 [2020-12-23 06:46:29,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 06:46:29,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 06:46:29,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 06:46:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-23 06:46:29,554 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2020-12-23 06:46:29,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:29,555 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-23 06:46:29,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:46:29,555 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-23 06:46:29,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:46:29,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:29,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:29,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:46:29,557 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:29,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:29,558 INFO L82 PathProgramCache]: Analyzing trace with hash -217285445, now seen corresponding path program 1 times [2020-12-23 06:46:29,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:29,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653531929] [2020-12-23 06:46:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:29,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653531929] [2020-12-23 06:46:29,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:46:29,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:46:29,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810017585] [2020-12-23 06:46:29,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:46:29,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:29,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:46:29,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:46:29,821 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 5 states. [2020-12-23 06:46:29,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:29,992 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-12-23 06:46:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:46:29,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 06:46:29,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:29,994 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:46:29,994 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 06:46:29,996 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 [2020-12-23 06:46:29,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 06:46:30,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2020-12-23 06:46:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 06:46:30,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-23 06:46:30,002 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 11 [2020-12-23 06:46:30,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:30,003 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-23 06:46:30,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:46:30,003 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-23 06:46:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:46:30,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:30,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:30,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:46:30,005 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:30,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:30,006 INFO L82 PathProgramCache]: Analyzing trace with hash -2020776544, now seen corresponding path program 1 times [2020-12-23 06:46:30,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:30,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082141608] [2020-12-23 06:46:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:30,844 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2020-12-23 06:46:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:46:31,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082141608] [2020-12-23 06:46:31,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231802424] [2020-12-23 06:46:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:31,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:46:31,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:31,335 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 [2020-12-23 06:46:31,348 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:46:31,367 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:46:31,369 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:46:31,369 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:18 [2020-12-23 06:46:31,445 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:46:31,446 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 [2020-12-23 06:46:31,450 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:46:31,501 INFO L625 ElimStorePlain]: treesize reduction 18, result has 66.0 percent of original size [2020-12-23 06:46:31,503 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:46:31,504 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2020-12-23 06:46:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:46:31,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:31,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 06:46:31,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973245629] [2020-12-23 06:46:31,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:46:31,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:31,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:46:31,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:46:31,667 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 10 states. [2020-12-23 06:46:31,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:31,965 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-12-23 06:46:31,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:46:31,966 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-23 06:46:31,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:31,967 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:46:31,967 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 06:46:31,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:46:31,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 06:46:31,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2020-12-23 06:46:31,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 06:46:31,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-23 06:46:31,975 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2020-12-23 06:46:31,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:31,976 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-23 06:46:31,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:46:31,976 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-23 06:46:31,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 06:46:31,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:31,977 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] [2020-12-23 06:46:32,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:46:32,188 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:32,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:32,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1709087114, now seen corresponding path program 1 times [2020-12-23 06:46:32,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:32,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780837287] [2020-12-23 06:46:32,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:46:32,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780837287] [2020-12-23 06:46:32,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956079228] [2020-12-23 06:46:32,487 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 [2020-12-23 06:46:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:32,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:46:32,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:46:32,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:32,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-23 06:46:32,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850953046] [2020-12-23 06:46:32,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:46:32,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:32,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:46:32,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:46:32,778 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 9 states. [2020-12-23 06:46:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:32,996 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-12-23 06:46:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:46:32,997 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-12-23 06:46:32,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:32,999 INFO L225 Difference]: With dead ends: 76 [2020-12-23 06:46:32,999 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 06:46:33,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:46:33,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 06:46:33,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2020-12-23 06:46:33,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 06:46:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-23 06:46:33,008 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2020-12-23 06:46:33,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:33,009 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-23 06:46:33,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:46:33,009 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-23 06:46:33,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 06:46:33,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:33,010 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] [2020-12-23 06:46:33,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:33,225 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:33,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:33,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1108233645, now seen corresponding path program 2 times [2020-12-23 06:46:33,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:33,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499449973] [2020-12-23 06:46:33,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:34,363 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-12-23 06:46:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:34,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499449973] [2020-12-23 06:46:34,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793754661] [2020-12-23 06:46:34,700 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 [2020-12-23 06:46:34,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:46:34,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:34,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:46:34,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:34,804 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:46:34,805 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 [2020-12-23 06:46:34,812 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:46:34,820 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:46:34,822 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:46:34,823 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2020-12-23 06:46:34,901 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 [2020-12-23 06:46:34,902 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:46:34,911 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:46:34,914 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:46:34,914 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2020-12-23 06:46:34,964 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 [2020-12-23 06:46:34,965 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:46:34,975 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:46:34,982 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:46:34,983 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:16 [2020-12-23 06:46:35,001 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 [2020-12-23 06:46:35,002 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:46:35,010 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:46:35,034 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:46:35,035 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2020-12-23 06:46:35,056 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 [2020-12-23 06:46:35,059 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:46:35,074 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:46:35,075 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:46:35,076 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:51 [2020-12-23 06:46:35,191 INFO L348 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2020-12-23 06:46:35,192 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 [2020-12-23 06:46:35,196 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:46:35,210 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:46:35,211 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:46:35,211 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:53 [2020-12-23 06:46:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:35,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:35,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-23 06:46:35,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675386542] [2020-12-23 06:46:35,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:46:35,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:35,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:46:35,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:46:35,527 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 22 states. [2020-12-23 06:46:36,530 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-23 06:46:36,796 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-12-23 06:46:37,321 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2020-12-23 06:46:37,470 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-12-23 06:46:37,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:37,924 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-12-23 06:46:37,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:46:37,924 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-12-23 06:46:37,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:37,926 INFO L225 Difference]: With dead ends: 62 [2020-12-23 06:46:37,926 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 06:46:37,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:46:37,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 06:46:37,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2020-12-23 06:46:37,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 06:46:37,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-12-23 06:46:37,936 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 31 [2020-12-23 06:46:37,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:37,937 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-12-23 06:46:37,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:46:37,937 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-12-23 06:46:37,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 06:46:37,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:37,938 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] [2020-12-23 06:46:38,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:38,154 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:38,156 INFO L82 PathProgramCache]: Analyzing trace with hash -626687997, now seen corresponding path program 3 times [2020-12-23 06:46:38,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:38,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617962330] [2020-12-23 06:46:38,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 06:46:38,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617962330] [2020-12-23 06:46:38,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937900519] [2020-12-23 06:46:38,415 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 [2020-12-23 06:46:38,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 06:46:38,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:38,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:46:38,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 06:46:38,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:38,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-12-23 06:46:38,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531832478] [2020-12-23 06:46:38,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:46:38,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:38,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:46:38,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:46:38,841 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 11 states. [2020-12-23 06:46:39,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:39,195 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2020-12-23 06:46:39,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:46:39,196 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-12-23 06:46:39,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:39,197 INFO L225 Difference]: With dead ends: 103 [2020-12-23 06:46:39,198 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 06:46:39,199 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 [2020-12-23 06:46:39,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 06:46:39,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2020-12-23 06:46:39,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 06:46:39,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-12-23 06:46:39,218 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 35 [2020-12-23 06:46:39,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:39,218 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-12-23 06:46:39,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:46:39,219 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-12-23 06:46:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 06:46:39,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:39,222 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] [2020-12-23 06:46:39,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:39,437 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:39,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:39,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1732581416, now seen corresponding path program 4 times [2020-12-23 06:46:39,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:39,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638845812] [2020-12-23 06:46:39,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:40,531 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-23 06:46:40,848 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-12-23 06:46:41,492 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-12-23 06:46:42,002 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-23 06:46:42,163 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-12-23 06:46:42,365 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-12-23 06:46:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:42,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638845812] [2020-12-23 06:46:42,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134343399] [2020-12-23 06:46:42,453 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 [2020-12-23 06:46:42,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:46:42,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:42,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 06:46:42,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:42,996 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 [2020-12-23 06:46:43,002 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:46:43,015 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:46:43,019 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:46:43,020 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:18 [2020-12-23 06:46:43,486 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 [2020-12-23 06:46:43,488 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:46:43,507 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:46:43,509 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:46:43,510 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:23 [2020-12-23 06:46:43,650 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 06:46:43,655 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:46:43,656 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 [2020-12-23 06:46:43,659 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:46:43,698 INFO L625 ElimStorePlain]: treesize reduction 30, result has 63.9 percent of original size [2020-12-23 06:46:43,700 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:46:43,700 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:53 [2020-12-23 06:46:43,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:46:43,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:46:43,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:46:43,910 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 06:46:43,911 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 06:46:43,958 INFO L348 Elim1Store]: treesize reduction 54, result has 37.2 percent of original size [2020-12-23 06:46:43,959 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 [2020-12-23 06:46:43,964 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:46:44,029 INFO L625 ElimStorePlain]: treesize reduction 64, result has 59.5 percent of original size [2020-12-23 06:46:44,030 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:46:44,031 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:98, output treesize:94 [2020-12-23 06:46:44,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:46:44,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:46:44,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:46:44,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:46:44,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:46:44,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:46:44,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:46:44,271 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 06:46:44,277 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 06:46:44,340 INFO L348 Elim1Store]: treesize reduction 60, result has 40.6 percent of original size [2020-12-23 06:46:44,340 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 [2020-12-23 06:46:44,346 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:46:44,404 INFO L625 ElimStorePlain]: treesize reduction 58, result has 57.4 percent of original size [2020-12-23 06:46:44,406 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:46:44,406 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:82, output treesize:78 [2020-12-23 06:46:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:45,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:45,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2020-12-23 06:46:45,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405123649] [2020-12-23 06:46:45,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:46:45,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:45,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:46:45,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:46:45,160 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 40 states. [2020-12-23 06:46:45,978 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-23 06:46:46,603 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-23 06:46:46,840 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-12-23 06:46:47,034 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-12-23 06:46:47,344 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2020-12-23 06:46:47,660 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 66 [2020-12-23 06:46:48,030 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2020-12-23 06:46:48,398 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2020-12-23 06:46:49,016 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2020-12-23 06:46:49,596 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 73 [2020-12-23 06:46:50,070 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 69 [2020-12-23 06:46:50,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:50,434 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2020-12-23 06:46:50,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:46:50,435 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-12-23 06:46:50,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:50,436 INFO L225 Difference]: With dead ends: 128 [2020-12-23 06:46:50,436 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 06:46:50,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=586, Invalid=4384, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:46:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 06:46:50,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2020-12-23 06:46:50,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 06:46:50,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-12-23 06:46:50,452 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 43 [2020-12-23 06:46:50,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:50,452 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-12-23 06:46:50,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:46:50,453 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-12-23 06:46:50,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 06:46:50,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:50,454 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] [2020-12-23 06:46:50,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 06:46:50,657 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:50,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:50,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1525407304, now seen corresponding path program 5 times [2020-12-23 06:46:50,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:50,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835224099] [2020-12-23 06:46:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 06:46:51,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835224099] [2020-12-23 06:46:51,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836061272] [2020-12-23 06:46:51,054 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