/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_running-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:07:34,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:07:34,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:07:34,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:07:34,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:07:34,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:07:34,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:07:34,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:07:34,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:07:34,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:07:34,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:07:34,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:07:34,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:07:34,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:07:34,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:07:34,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:07:34,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:07:34,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:07:34,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:07:34,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:07:34,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:07:34,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:07:34,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:07:34,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:07:34,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:07:34,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:07:34,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:07:34,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:07:34,374 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 00:07:34,429 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:07:34,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:07:34,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:07:34,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:07:34,434 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:07:34,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:07:34,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:07:34,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:07:34,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:07:34,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:07:34,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:07:34,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:07:34,436 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:07:34,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:07:34,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:07:34,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:07:34,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:07:34,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:07:34,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:07:34,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:07:34,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:07:34,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:07:34,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:07:34,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:07:34,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:07:34,439 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:07:34,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:07:34,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:07:34,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:07:34,917 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:07:34,918 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:07:34,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_running-1.i [2020-12-23 00:07:35,014 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7a472139b/82c9614f4abc4277954b029e30dc8bd0/FLAG3f8f06d79 [2020-12-23 00:07:35,786 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:07:35,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_running-1.i [2020-12-23 00:07:35,799 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7a472139b/82c9614f4abc4277954b029e30dc8bd0/FLAG3f8f06d79 [2020-12-23 00:07:36,089 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7a472139b/82c9614f4abc4277954b029e30dc8bd0 [2020-12-23 00:07:36,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:07:36,096 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:07:36,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:07:36,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:07:36,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:07:36,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:07:36" (1/1) ... [2020-12-23 00:07:36,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@586291c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:36, skipping insertion in model container [2020-12-23 00:07:36,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:07:36" (1/1) ... [2020-12-23 00:07:36,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:07:36,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:07:36,327 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_running-1.i[811,824] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:07:36,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:07:36,359 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:07:36,374 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_running-1.i[811,824] 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],IdentifierExpression[~i~0,]]]]] 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],IdentifierExpression[~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],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:07:36,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:07:36,402 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:07:36,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:36 WrapperNode [2020-12-23 00:07:36,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:07:36,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:07:36,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:07:36,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:07:36,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:36" (1/1) ... [2020-12-23 00:07:36,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:36" (1/1) ... [2020-12-23 00:07:36,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:07:36,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:07:36,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:07:36,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:07:36,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:36" (1/1) ... [2020-12-23 00:07:36,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:36" (1/1) ... [2020-12-23 00:07:36,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:36" (1/1) ... [2020-12-23 00:07:36,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:36" (1/1) ... [2020-12-23 00:07:36,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:36" (1/1) ... [2020-12-23 00:07:36,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:36" (1/1) ... [2020-12-23 00:07:36,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:36" (1/1) ... [2020-12-23 00:07:36,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:07:36,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:07:36,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:07:36,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:07:36,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:36" (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 00:07:36,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:07:36,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:07:36,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:07:36,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:07:36,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:07:36,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:07:36,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:07:37,010 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:07:37,011 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 00:07:37,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:07:37 BoogieIcfgContainer [2020-12-23 00:07:37,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:07:37,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:07:37,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:07:37,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:07:37,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:07:36" (1/3) ... [2020-12-23 00:07:37,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbf328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:07:37, skipping insertion in model container [2020-12-23 00:07:37,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:36" (2/3) ... [2020-12-23 00:07:37,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbf328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:07:37, skipping insertion in model container [2020-12-23 00:07:37,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:07:37" (3/3) ... [2020-12-23 00:07:37,047 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-1.i [2020-12-23 00:07:37,055 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:07:37,061 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:07:37,087 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:07:37,122 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:07:37,123 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:07:37,123 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:07:37,123 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:07:37,124 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:07:37,124 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:07:37,124 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:07:37,124 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:07:37,141 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-23 00:07:37,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:07:37,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:37,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:37,149 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:37,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:37,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2030235279, now seen corresponding path program 1 times [2020-12-23 00:07:37,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:37,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413807385] [2020-12-23 00:07:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:37,349 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 00:07:37,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413807385] [2020-12-23 00:07:37,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:07:37,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:07:37,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911398059] [2020-12-23 00:07:37,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:07:37,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:37,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:07:37,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:07:37,377 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-12-23 00:07:37,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:37,397 INFO L93 Difference]: Finished difference Result 44 states and 64 transitions. [2020-12-23 00:07:37,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:07:37,399 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 00:07:37,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:37,408 INFO L225 Difference]: With dead ends: 44 [2020-12-23 00:07:37,408 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 00:07:37,412 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 00:07:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 00:07:37,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 00:07:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 00:07:37,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2020-12-23 00:07:37,452 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 10 [2020-12-23 00:07:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:37,452 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2020-12-23 00:07:37,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:07:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2020-12-23 00:07:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:07:37,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:37,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:37,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:07:37,454 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:37,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1948917626, now seen corresponding path program 1 times [2020-12-23 00:07:37,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:37,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496716415] [2020-12-23 00:07:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:37,516 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 00:07:37,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496716415] [2020-12-23 00:07:37,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:07:37,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:07:37,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152987142] [2020-12-23 00:07:37,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:07:37,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:37,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:07:37,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:07:37,521 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand 3 states. [2020-12-23 00:07:37,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:37,636 INFO L93 Difference]: Finished difference Result 48 states and 69 transitions. [2020-12-23 00:07:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:07:37,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 00:07:37,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:37,639 INFO L225 Difference]: With dead ends: 48 [2020-12-23 00:07:37,639 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 00:07:37,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:07:37,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 00:07:37,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2020-12-23 00:07:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 00:07:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2020-12-23 00:07:37,648 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 10 [2020-12-23 00:07:37,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:37,648 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2020-12-23 00:07:37,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:07:37,649 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2020-12-23 00:07:37,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 00:07:37,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:37,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:37,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:07:37,650 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:37,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:37,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1221461665, now seen corresponding path program 1 times [2020-12-23 00:07:37,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:37,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523026403] [2020-12-23 00:07:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:37,750 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 00:07:37,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523026403] [2020-12-23 00:07:37,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177537522] [2020-12-23 00:07:37,752 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 00:07:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:37,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:07:37,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:38,082 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 00:07:38,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:38,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:07:38,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153564338] [2020-12-23 00:07:38,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:07:38,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:38,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:07:38,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:07:38,096 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 5 states. [2020-12-23 00:07:38,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:38,237 INFO L93 Difference]: Finished difference Result 62 states and 88 transitions. [2020-12-23 00:07:38,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:07:38,238 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-12-23 00:07:38,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:38,239 INFO L225 Difference]: With dead ends: 62 [2020-12-23 00:07:38,239 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 00:07:38,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:07:38,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 00:07:38,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2020-12-23 00:07:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 00:07:38,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2020-12-23 00:07:38,247 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 22 [2020-12-23 00:07:38,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:38,248 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2020-12-23 00:07:38,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:07:38,248 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2020-12-23 00:07:38,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 00:07:38,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:38,249 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:38,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:07:38,466 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:38,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:38,468 INFO L82 PathProgramCache]: Analyzing trace with hash 36788574, now seen corresponding path program 2 times [2020-12-23 00:07:38,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:38,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877709286] [2020-12-23 00:07:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:07:38,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877709286] [2020-12-23 00:07:38,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:07:38,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 00:07:38,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981297860] [2020-12-23 00:07:38,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:07:38,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:38,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:07:38,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:07:38,568 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand 5 states. [2020-12-23 00:07:38,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:38,631 INFO L93 Difference]: Finished difference Result 61 states and 86 transitions. [2020-12-23 00:07:38,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:07:38,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-23 00:07:38,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:38,633 INFO L225 Difference]: With dead ends: 61 [2020-12-23 00:07:38,633 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 00:07:38,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:07:38,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 00:07:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-12-23 00:07:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 00:07:38,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2020-12-23 00:07:38,642 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 34 [2020-12-23 00:07:38,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:38,642 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2020-12-23 00:07:38,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:07:38,642 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2020-12-23 00:07:38,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 00:07:38,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:38,644 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:38,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 00:07:38,644 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:38,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:38,645 INFO L82 PathProgramCache]: Analyzing trace with hash 271130974, now seen corresponding path program 1 times [2020-12-23 00:07:38,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:38,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169390159] [2020-12-23 00:07:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 00:07:38,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169390159] [2020-12-23 00:07:38,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477584935] [2020-12-23 00:07:38,713 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 00:07:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:38,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:07:38,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 00:07:38,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:38,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 00:07:38,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764440747] [2020-12-23 00:07:38,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:07:38,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:38,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:07:38,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:07:38,814 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand 6 states. [2020-12-23 00:07:38,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:38,899 INFO L93 Difference]: Finished difference Result 108 states and 150 transitions. [2020-12-23 00:07:38,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:07:38,899 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-12-23 00:07:38,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:38,900 INFO L225 Difference]: With dead ends: 108 [2020-12-23 00:07:38,900 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 00:07:38,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:07:38,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 00:07:38,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2020-12-23 00:07:38,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 00:07:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2020-12-23 00:07:38,910 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 34 [2020-12-23 00:07:38,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:38,910 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2020-12-23 00:07:38,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:07:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2020-12-23 00:07:38,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:07:38,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:38,912 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:39,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:39,126 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:39,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:39,127 INFO L82 PathProgramCache]: Analyzing trace with hash 984188611, now seen corresponding path program 2 times [2020-12-23 00:07:39,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:39,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308384740] [2020-12-23 00:07:39,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 00:07:39,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308384740] [2020-12-23 00:07:39,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291287887] [2020-12-23 00:07:39,244 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 00:07:39,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:39,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:39,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:07:39,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 00:07:39,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:39,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:07:39,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93765257] [2020-12-23 00:07:39,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:07:39,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:39,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:07:39,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:07:39,399 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand 7 states. [2020-12-23 00:07:39,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:39,516 INFO L93 Difference]: Finished difference Result 138 states and 192 transitions. [2020-12-23 00:07:39,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:07:39,516 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-12-23 00:07:39,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:39,518 INFO L225 Difference]: With dead ends: 138 [2020-12-23 00:07:39,518 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 00:07:39,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:07:39,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 00:07:39,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2020-12-23 00:07:39,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 00:07:39,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2020-12-23 00:07:39,528 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 46 [2020-12-23 00:07:39,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:39,529 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2020-12-23 00:07:39,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:07:39,529 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2020-12-23 00:07:39,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 00:07:39,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:39,531 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:39,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:39,749 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:39,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:39,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1354664638, now seen corresponding path program 3 times [2020-12-23 00:07:39,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:39,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616124352] [2020-12-23 00:07:39,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-12-23 00:07:39,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616124352] [2020-12-23 00:07:39,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842439382] [2020-12-23 00:07:39,850 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 00:07:39,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:07:39,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:39,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:07:39,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:39,982 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 00:07:39,983 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:39,988 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:39,989 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:07:39,990 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 00:07:40,297 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:40,303 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:07:40,331 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:40,332 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 treesize of output 24 [2020-12-23 00:07:40,335 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:40,337 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:40,346 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:40,347 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 [2020-12-23 00:07:40,349 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:40,391 INFO L625 ElimStorePlain]: treesize reduction 1, result has 96.9 percent of original size [2020-12-23 00:07:40,396 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:07:40,396 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:69, output treesize:18 [2020-12-23 00:07:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-23 00:07:40,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:40,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2020-12-23 00:07:40,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244366493] [2020-12-23 00:07:40,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:07:40,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:40,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:07:40,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:07:40,507 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand 14 states. [2020-12-23 00:07:41,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:41,463 INFO L93 Difference]: Finished difference Result 290 states and 416 transitions. [2020-12-23 00:07:41,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 00:07:41,464 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-12-23 00:07:41,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:41,467 INFO L225 Difference]: With dead ends: 290 [2020-12-23 00:07:41,468 INFO L226 Difference]: Without dead ends: 226 [2020-12-23 00:07:41,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:07:41,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-23 00:07:41,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 204. [2020-12-23 00:07:41,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-23 00:07:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 285 transitions. [2020-12-23 00:07:41,489 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 285 transitions. Word has length 58 [2020-12-23 00:07:41,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:41,489 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 285 transitions. [2020-12-23 00:07:41,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:07:41,489 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 285 transitions. [2020-12-23 00:07:41,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 00:07:41,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:41,492 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:41,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:41,706 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:41,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:41,707 INFO L82 PathProgramCache]: Analyzing trace with hash -937413107, now seen corresponding path program 1 times [2020-12-23 00:07:41,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:41,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330237768] [2020-12-23 00:07:41,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-12-23 00:07:41,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330237768] [2020-12-23 00:07:41,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415669985] [2020-12-23 00:07:41,872 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 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 00:07:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:41,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:07:41,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-12-23 00:07:42,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:42,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:07:42,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628275471] [2020-12-23 00:07:42,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:07:42,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:42,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:07:42,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:07:42,091 INFO L87 Difference]: Start difference. First operand 204 states and 285 transitions. Second operand 11 states. [2020-12-23 00:07:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:42,319 INFO L93 Difference]: Finished difference Result 472 states and 660 transitions. [2020-12-23 00:07:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:07:42,319 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 94 [2020-12-23 00:07:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:42,322 INFO L225 Difference]: With dead ends: 472 [2020-12-23 00:07:42,322 INFO L226 Difference]: Without dead ends: 285 [2020-12-23 00:07:42,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:07:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-12-23 00:07:42,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 231. [2020-12-23 00:07:42,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-12-23 00:07:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 323 transitions. [2020-12-23 00:07:42,354 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 323 transitions. Word has length 94 [2020-12-23 00:07:42,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:42,355 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 323 transitions. [2020-12-23 00:07:42,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:07:42,355 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 323 transitions. [2020-12-23 00:07:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 00:07:42,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:42,358 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:42,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:42,565 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:42,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1234891020, now seen corresponding path program 2 times [2020-12-23 00:07:42,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:42,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711219735] [2020-12-23 00:07:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2020-12-23 00:07:42,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711219735] [2020-12-23 00:07:42,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571883221] [2020-12-23 00:07:42,818 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:42,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:42,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:42,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:07:42,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2020-12-23 00:07:43,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:43,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:07:43,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286227457] [2020-12-23 00:07:43,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:07:43,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:43,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:07:43,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:07:43,029 INFO L87 Difference]: Start difference. First operand 231 states and 323 transitions. Second operand 12 states. [2020-12-23 00:07:43,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:43,279 INFO L93 Difference]: Finished difference Result 524 states and 734 transitions. [2020-12-23 00:07:43,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:07:43,280 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 106 [2020-12-23 00:07:43,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:43,283 INFO L225 Difference]: With dead ends: 524 [2020-12-23 00:07:43,283 INFO L226 Difference]: Without dead ends: 312 [2020-12-23 00:07:43,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:07:43,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-12-23 00:07:43,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 258. [2020-12-23 00:07:43,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-12-23 00:07:43,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 361 transitions. [2020-12-23 00:07:43,301 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 361 transitions. Word has length 106 [2020-12-23 00:07:43,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:43,301 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 361 transitions. [2020-12-23 00:07:43,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:07:43,302 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 361 transitions. [2020-12-23 00:07:43,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 00:07:43,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:43,305 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:43,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:43,519 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:43,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:43,520 INFO L82 PathProgramCache]: Analyzing trace with hash -967925327, now seen corresponding path program 3 times [2020-12-23 00:07:43,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:43,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626012076] [2020-12-23 00:07:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-23 00:07:43,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626012076] [2020-12-23 00:07:43,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509736974] [2020-12-23 00:07:43,739 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:43,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:07:43,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:43,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:07:43,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:43,871 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 00:07:43,872 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:43,874 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:43,875 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:07:43,875 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 00:07:43,951 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2020-12-23 00:07:43,951 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2020-12-23 00:07:43,953 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:43,960 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:43,962 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:07:43,963 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-12-23 00:07:44,510 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:07:44,513 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:07:44,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:07:44,547 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:44,547 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 44 [2020-12-23 00:07:44,551 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:07:44,551 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:44,554 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:44,580 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2020-12-23 00:07:44,581 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2020-12-23 00:07:44,583 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:44,624 INFO L625 ElimStorePlain]: treesize reduction 1, result has 97.2 percent of original size [2020-12-23 00:07:44,632 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-12-23 00:07:44,633 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:87, output treesize:17 [2020-12-23 00:07:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 39 proven. 101 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-12-23 00:07:44,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:44,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2020-12-23 00:07:44,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370467203] [2020-12-23 00:07:44,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:07:44,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:44,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:07:44,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:07:44,866 INFO L87 Difference]: Start difference. First operand 258 states and 361 transitions. Second operand 23 states. [2020-12-23 00:07:48,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:48,632 INFO L93 Difference]: Finished difference Result 890 states and 1256 transitions. [2020-12-23 00:07:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-23 00:07:48,632 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 118 [2020-12-23 00:07:48,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:48,637 INFO L225 Difference]: With dead ends: 890 [2020-12-23 00:07:48,637 INFO L226 Difference]: Without dead ends: 653 [2020-12-23 00:07:48,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1857, Invalid=6333, Unknown=0, NotChecked=0, Total=8190 [2020-12-23 00:07:48,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2020-12-23 00:07:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 516. [2020-12-23 00:07:48,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-12-23 00:07:48,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 731 transitions. [2020-12-23 00:07:48,680 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 731 transitions. Word has length 118 [2020-12-23 00:07:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:48,680 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 731 transitions. [2020-12-23 00:07:48,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:07:48,681 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 731 transitions. [2020-12-23 00:07:48,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-23 00:07:48,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:48,686 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:48,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:07:48,900 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:48,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:48,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1090307401, now seen corresponding path program 4 times [2020-12-23 00:07:48,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:48,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300181538] [2020-12-23 00:07:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 806 trivial. 0 not checked. [2020-12-23 00:07:49,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300181538] [2020-12-23 00:07:49,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559878391] [2020-12-23 00:07:49,228 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:49,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:07:49,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:49,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 00:07:49,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:49,498 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 00:07:49,499 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:49,503 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:49,504 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:07:49,504 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 00:07:49,584 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:49,585 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-23 00:07:49,588 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:49,606 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2020-12-23 00:07:49,606 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:07:49,607 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2020-12-23 00:07:49,718 INFO L348 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2020-12-23 00:07:49,720 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2020-12-23 00:07:49,722 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:49,728 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:49,729 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:07:49,731 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-23 00:07:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 197 proven. 592 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2020-12-23 00:07:50,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:50,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 30] total 43 [2020-12-23 00:07:50,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291938421] [2020-12-23 00:07:50,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 00:07:50,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:50,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 00:07:50,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1404, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:07:50,539 INFO L87 Difference]: Start difference. First operand 516 states and 731 transitions. Second operand 43 states. [2020-12-23 00:07:52,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:52,597 INFO L93 Difference]: Finished difference Result 1471 states and 2083 transitions. [2020-12-23 00:07:52,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 00:07:52,598 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 166 [2020-12-23 00:07:52,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:52,625 INFO L225 Difference]: With dead ends: 1471 [2020-12-23 00:07:52,625 INFO L226 Difference]: Without dead ends: 984 [2020-12-23 00:07:52,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=434, Invalid=1636, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 00:07:52,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2020-12-23 00:07:52,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 680. [2020-12-23 00:07:52,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-12-23 00:07:52,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 966 transitions. [2020-12-23 00:07:52,670 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 966 transitions. Word has length 166 [2020-12-23 00:07:52,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:52,671 INFO L481 AbstractCegarLoop]: Abstraction has 680 states and 966 transitions. [2020-12-23 00:07:52,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 00:07:52,671 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 966 transitions. [2020-12-23 00:07:52,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-23 00:07:52,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:52,678 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:52,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:07:52,894 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:52,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:52,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1067722828, now seen corresponding path program 5 times [2020-12-23 00:07:52,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:52,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402320052] [2020-12-23 00:07:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 938 trivial. 0 not checked. [2020-12-23 00:07:53,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402320052] [2020-12-23 00:07:53,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625171235] [2020-12-23 00:07:53,258 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:02,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-12-23 00:08:02,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:08:02,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:08:02,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:08:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2020-12-23 00:08:02,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:08:02,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 00:08:02,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035154857] [2020-12-23 00:08:02,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:08:02,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:08:02,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:08:02,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:08:02,776 INFO L87 Difference]: Start difference. First operand 680 states and 966 transitions. Second operand 18 states. [2020-12-23 00:08:03,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:08:03,148 INFO L93 Difference]: Finished difference Result 1566 states and 2226 transitions. [2020-12-23 00:08:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:08:03,149 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 178 [2020-12-23 00:08:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:08:03,154 INFO L225 Difference]: With dead ends: 1566 [2020-12-23 00:08:03,154 INFO L226 Difference]: Without dead ends: 917 [2020-12-23 00:08:03,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:08:03,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2020-12-23 00:08:03,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 721. [2020-12-23 00:08:03,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2020-12-23 00:08:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1024 transitions. [2020-12-23 00:08:03,190 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1024 transitions. Word has length 178 [2020-12-23 00:08:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:08:03,191 INFO L481 AbstractCegarLoop]: Abstraction has 721 states and 1024 transitions. [2020-12-23 00:08:03,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:08:03,191 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1024 transitions. [2020-12-23 00:08:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-12-23 00:08:03,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:08:03,195 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:08:03,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:03,408 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:08:03,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:08:03,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1455991971, now seen corresponding path program 6 times [2020-12-23 00:08:03,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:08:03,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984359699] [2020-12-23 00:08:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:08:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-12-23 00:08:03,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984359699] [2020-12-23 00:08:03,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247751346] [2020-12-23 00:08:03,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:04,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:08:04,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:08:04,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:08:04,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:08:04,268 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 00:08:04,269 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:08:04,271 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:08:04,272 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:08:04,272 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 00:08:04,317 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2020-12-23 00:08:04,318 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2020-12-23 00:08:04,319 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:08:04,324 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:08:04,325 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:08:04,325 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2020-12-23 00:08:04,440 INFO L348 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2020-12-23 00:08:04,441 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 42 [2020-12-23 00:08:04,443 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:08:04,453 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:08:04,454 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:08:04,455 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:39 [2020-12-23 00:08:07,020 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:08:07,023 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 00:08:07,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:08:07,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:08:07,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:08:07,072 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:08:07,073 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 64 [2020-12-23 00:08:07,076 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:08:07,078 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:08:07,080 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:08:07,082 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:08:07,123 INFO L348 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2020-12-23 00:08:07,123 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2020-12-23 00:08:07,126 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:08:07,171 INFO L625 ElimStorePlain]: treesize reduction 1, result has 97.8 percent of original size [2020-12-23 00:08:07,175 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-12-23 00:08:07,175 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:111, output treesize:23 [2020-12-23 00:08:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 106 proven. 266 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2020-12-23 00:08:07,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:08:07,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2020-12-23 00:08:07,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378415226] [2020-12-23 00:08:07,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:08:07,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:08:07,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:08:07,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=698, Unknown=1, NotChecked=0, Total=992 [2020-12-23 00:08:07,681 INFO L87 Difference]: Start difference. First operand 721 states and 1024 transitions. Second operand 32 states. [2020-12-23 00:08:24,764 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:08:42,635 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-12-23 00:09:02,792 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:09:19,591 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:09:32,545 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:09:52,447 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:10:12,890 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:10:30,162 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:10:52,684 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:11:19,218 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:11:38,867 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:12:01,115 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 36