/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/verifythis/tree_max.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:28:15,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:28:15,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:28:15,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:28:15,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:28:15,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:28:15,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:28:15,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:28:15,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:28:15,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:28:15,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:28:15,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:28:15,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:28:15,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:28:15,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:28:15,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:28:15,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:28:15,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:28:15,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:28:15,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:28:15,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:28:15,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:28:15,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:28:15,431 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:28:15,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 09:28:15,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 09:28:15,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 09:28:15,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 09:28:15,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 09:28:15,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 09:28:15,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:28:15,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:28:15,451 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:28:15,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:28:15,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:28:15,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:28:15,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:28:15,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:28:15,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:28:15,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:28:15,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:28:15,484 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 09:28:15,539 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:28:15,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:28:15,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:28:15,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:28:15,544 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:28:15,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:28:15,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:28:15,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:28:15,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:28:15,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:28:15,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:28:15,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:28:15,547 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:28:15,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:28:15,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:28:15,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:28:15,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:28:15,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:28:15,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:28:15,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:28:15,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:28:15,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:28:15,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:28:15,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:28:15,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:28:15,549 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:28:15,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:28:16,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:28:16,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:28:16,028 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:28:16,028 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:28:16,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_max.c [2020-12-23 09:28:16,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4bdb2b1af/109efa4e104247d69b4d479b988789ef/FLAGcfca30efa [2020-12-23 09:28:16,695 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:28:16,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2020-12-23 09:28:16,705 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4bdb2b1af/109efa4e104247d69b4d479b988789ef/FLAGcfca30efa [2020-12-23 09:28:17,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4bdb2b1af/109efa4e104247d69b4d479b988789ef [2020-12-23 09:28:17,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:28:17,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:28:17,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:28:17,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:28:17,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:28:17,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:28:17" (1/1) ... [2020-12-23 09:28:17,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@382f1400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:17, skipping insertion in model container [2020-12-23 09:28:17,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:28:17" (1/1) ... [2020-12-23 09:28:17,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:28:17,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:28:17,309 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/verifythis/tree_max.c[544,557] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~n~0,],base],StructAccessExpression[IdentifierExpression[~n~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~n~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~n~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~n~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[12],StructAccessExpression[IdentifierExpression[~n~0,],offset]]]] [2020-12-23 09:28:17,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:28:17,345 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:28:17,360 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/verifythis/tree_max.c[544,557] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~n~0,],base],StructAccessExpression[IdentifierExpression[~n~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~n~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~n~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~n~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[12],StructAccessExpression[IdentifierExpression[~n~0,],offset]]]] [2020-12-23 09:28:17,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:28:17,390 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:28:17,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:17 WrapperNode [2020-12-23 09:28:17,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:28:17,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:28:17,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:28:17,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:28:17,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:17" (1/1) ... [2020-12-23 09:28:17,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:17" (1/1) ... [2020-12-23 09:28:17,433 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:28:17,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:28:17,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:28:17,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:28:17,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:17" (1/1) ... [2020-12-23 09:28:17,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:17" (1/1) ... [2020-12-23 09:28:17,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:17" (1/1) ... [2020-12-23 09:28:17,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:17" (1/1) ... [2020-12-23 09:28:17,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:17" (1/1) ... [2020-12-23 09:28:17,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:17" (1/1) ... [2020-12-23 09:28:17,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:17" (1/1) ... [2020-12-23 09:28:17,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:28:17,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:28:17,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:28:17,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:28:17,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:17" (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 09:28:17,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-23 09:28:17,575 INFO L130 BoogieDeclarations]: Found specification of procedure max [2020-12-23 09:28:17,575 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2020-12-23 09:28:17,575 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-12-23 09:28:17,576 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-12-23 09:28:17,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:28:17,576 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-12-23 09:28:17,576 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-12-23 09:28:17,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-23 09:28:17,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:28:17,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 09:28:17,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 09:28:17,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:28:17,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:28:17,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 09:28:17,983 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:28:17,984 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 09:28:17,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:28:17 BoogieIcfgContainer [2020-12-23 09:28:17,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:28:17,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:28:17,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:28:17,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:28:17,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:28:17" (1/3) ... [2020-12-23 09:28:17,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae64cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:28:17, skipping insertion in model container [2020-12-23 09:28:17,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:17" (2/3) ... [2020-12-23 09:28:17,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae64cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:28:17, skipping insertion in model container [2020-12-23 09:28:17,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:28:17" (3/3) ... [2020-12-23 09:28:17,998 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max.c [2020-12-23 09:28:18,009 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:28:18,019 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:28:18,041 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:28:18,091 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:28:18,091 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:28:18,092 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:28:18,092 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:28:18,092 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:28:18,092 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:28:18,092 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:28:18,093 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:28:18,120 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-12-23 09:28:18,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 09:28:18,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:28:18,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:28:18,128 INFO L429 AbstractCegarLoop]: === Iteration 1 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:28:18,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:28:18,134 INFO L82 PathProgramCache]: Analyzing trace with hash 998783614, now seen corresponding path program 1 times [2020-12-23 09:28:18,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:28:18,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837607534] [2020-12-23 09:28:18,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:28:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:18,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:18,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-23 09:28:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:18,894 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 09:28:18,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837607534] [2020-12-23 09:28:18,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:28:18,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 09:28:18,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929487197] [2020-12-23 09:28:18,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 09:28:18,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:28:18,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 09:28:18,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:28:18,922 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 8 states. [2020-12-23 09:28:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:28:19,459 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2020-12-23 09:28:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:28:19,461 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-12-23 09:28:19,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:28:19,473 INFO L225 Difference]: With dead ends: 74 [2020-12-23 09:28:19,473 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 09:28:19,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-12-23 09:28:19,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 09:28:19,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-23 09:28:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 09:28:19,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-12-23 09:28:19,529 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 18 [2020-12-23 09:28:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:28:19,529 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-12-23 09:28:19,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 09:28:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-12-23 09:28:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 09:28:19,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:28:19,533 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 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 09:28:19,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:28:19,533 INFO L429 AbstractCegarLoop]: === Iteration 2 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:28:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:28:19,534 INFO L82 PathProgramCache]: Analyzing trace with hash -976273983, now seen corresponding path program 1 times [2020-12-23 09:28:19,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:28:19,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526710340] [2020-12-23 09:28:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:28:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:19,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:19,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:28:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:19,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:28:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:19,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-23 09:28:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 09:28:19,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526710340] [2020-12-23 09:28:19,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:28:19,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 09:28:19,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580698259] [2020-12-23 09:28:19,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 09:28:19,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:28:19,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 09:28:19,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:28:19,806 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 9 states. [2020-12-23 09:28:20,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:28:20,074 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-12-23 09:28:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 09:28:20,075 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-23 09:28:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:28:20,077 INFO L225 Difference]: With dead ends: 48 [2020-12-23 09:28:20,077 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 09:28:20,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 09:28:20,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 09:28:20,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 09:28:20,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 09:28:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-12-23 09:28:20,089 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 28 [2020-12-23 09:28:20,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:28:20,090 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-12-23 09:28:20,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 09:28:20,090 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-12-23 09:28:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 09:28:20,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:28:20,092 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 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 09:28:20,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:28:20,093 INFO L429 AbstractCegarLoop]: === Iteration 3 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:28:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:28:20,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1376325807, now seen corresponding path program 1 times [2020-12-23 09:28:20,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:28:20,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763089730] [2020-12-23 09:28:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:28:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:20,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:20,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:28:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:20,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:28:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:20,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-23 09:28:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:20,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:20,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:28:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 09:28:20,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763089730] [2020-12-23 09:28:20,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212055795] [2020-12-23 09:28:20,411 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 09:28:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:20,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 09:28:20,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:28:20,710 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:28:20,717 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:28:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 09:28:20,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:28:20,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2020-12-23 09:28:20,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647687935] [2020-12-23 09:28:20,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 09:28:20,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:28:20,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 09:28:20,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-12-23 09:28:20,740 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 14 states. [2020-12-23 09:28:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:28:21,270 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2020-12-23 09:28:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 09:28:21,270 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-12-23 09:28:21,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:28:21,272 INFO L225 Difference]: With dead ends: 46 [2020-12-23 09:28:21,273 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 09:28:21,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-12-23 09:28:21,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 09:28:21,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-12-23 09:28:21,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 09:28:21,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-12-23 09:28:21,283 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 41 [2020-12-23 09:28:21,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:28:21,284 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-12-23 09:28:21,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 09:28:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-12-23 09:28:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 09:28:21,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:28:21,286 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:28:21,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 09:28:21,501 INFO L429 AbstractCegarLoop]: === Iteration 4 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:28:21,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:28:21,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2126921006, now seen corresponding path program 1 times [2020-12-23 09:28:21,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:28:21,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390494463] [2020-12-23 09:28:21,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:28:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:21,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:21,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:28:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:21,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:28:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:21,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-23 09:28:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:22,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:22,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:28:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 09:28:22,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390494463] [2020-12-23 09:28:22,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755610883] [2020-12-23 09:28:22,215 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 09:28:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:22,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 09:28:22,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:28:22,424 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 13 treesize of output 9 [2020-12-23 09:28:22,425 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:22,432 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:22,436 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 13 treesize of output 9 [2020-12-23 09:28:22,437 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:22,441 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:22,442 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:28:22,443 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-12-23 09:28:22,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 09:28:22,536 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 09:28:22,538 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:22,548 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:22,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 09:28:22,554 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 09:28:22,556 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:22,565 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:22,567 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:28:22,568 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:45, output treesize:19 [2020-12-23 09:28:23,024 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-23 09:28:23,025 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:23,032 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:23,035 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-23 09:28:23,036 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:23,040 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:23,041 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:28:23,041 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-12-23 09:28:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 09:28:23,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:28:23,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 33 [2020-12-23 09:28:23,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265484133] [2020-12-23 09:28:23,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 09:28:23,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:28:23,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 09:28:23,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 09:28:23,065 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 33 states. [2020-12-23 09:28:26,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:28:26,440 INFO L93 Difference]: Finished difference Result 121 states and 167 transitions. [2020-12-23 09:28:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 09:28:26,441 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 47 [2020-12-23 09:28:26,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:28:26,454 INFO L225 Difference]: With dead ends: 121 [2020-12-23 09:28:26,454 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 09:28:26,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=382, Invalid=3650, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 09:28:26,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 09:28:26,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2020-12-23 09:28:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 09:28:26,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 134 transitions. [2020-12-23 09:28:26,508 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 134 transitions. Word has length 47 [2020-12-23 09:28:26,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:28:26,512 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 134 transitions. [2020-12-23 09:28:26,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 09:28:26,512 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 134 transitions. [2020-12-23 09:28:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 09:28:26,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:28:26,528 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:28:26,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:28:26,729 INFO L429 AbstractCegarLoop]: === Iteration 5 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:28:26,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:28:26,730 INFO L82 PathProgramCache]: Analyzing trace with hash -2051682644, now seen corresponding path program 1 times [2020-12-23 09:28:26,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:28:26,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292551564] [2020-12-23 09:28:26,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:28:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:26,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:27,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:28:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:27,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:28:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:27,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-23 09:28:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:27,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:27,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:28:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 09:28:27,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292551564] [2020-12-23 09:28:27,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053060837] [2020-12-23 09:28:27,075 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 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 09:28:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:27,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 09:28:27,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:28:27,264 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 13 treesize of output 9 [2020-12-23 09:28:27,265 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:27,281 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:27,286 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 13 treesize of output 9 [2020-12-23 09:28:27,287 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:27,301 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:27,303 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:28:27,303 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:37 [2020-12-23 09:28:27,776 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2020-12-23 09:28:27,780 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:27,790 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:27,794 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2020-12-23 09:28:27,797 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:27,807 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:27,808 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:28:27,808 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:55, output treesize:13 [2020-12-23 09:28:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 09:28:27,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:28:27,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2020-12-23 09:28:27,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781407559] [2020-12-23 09:28:27,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 09:28:27,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:28:27,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 09:28:27,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-12-23 09:28:27,857 INFO L87 Difference]: Start difference. First operand 91 states and 134 transitions. Second operand 21 states. [2020-12-23 09:28:29,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:28:29,024 INFO L93 Difference]: Finished difference Result 141 states and 198 transitions. [2020-12-23 09:28:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 09:28:29,025 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-12-23 09:28:29,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:28:29,027 INFO L225 Difference]: With dead ends: 141 [2020-12-23 09:28:29,027 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 09:28:29,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2020-12-23 09:28:29,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 09:28:29,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 79. [2020-12-23 09:28:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 09:28:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2020-12-23 09:28:29,046 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 47 [2020-12-23 09:28:29,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:28:29,046 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2020-12-23 09:28:29,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 09:28:29,047 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2020-12-23 09:28:29,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 09:28:29,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:28:29,050 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 09:28:29,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:28:29,264 INFO L429 AbstractCegarLoop]: === Iteration 6 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:28:29,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:28:29,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1408716111, now seen corresponding path program 2 times [2020-12-23 09:28:29,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:28:29,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205905640] [2020-12-23 09:28:29,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:28:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:29,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:29,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:28:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:29,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:28:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:29,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:28:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:29,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:28:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:29,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-23 09:28:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:29,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:29,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:28:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 09:28:29,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205905640] [2020-12-23 09:28:29,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058826813] [2020-12-23 09:28:29,815 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 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 09:28:29,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:28:29,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:28:29,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 09:28:29,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:28:29,958 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 13 treesize of output 9 [2020-12-23 09:28:29,959 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:29,964 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:29,969 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 13 treesize of output 9 [2020-12-23 09:28:29,969 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:29,974 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:29,976 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:28:29,976 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:1 [2020-12-23 09:28:30,275 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-23 09:28:30,277 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:30,283 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:30,286 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-23 09:28:30,287 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:30,291 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:30,293 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:28:30,293 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-12-23 09:28:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 09:28:30,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:28:30,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 25 [2020-12-23 09:28:30,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850282592] [2020-12-23 09:28:30,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 09:28:30,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:28:30,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 09:28:30,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-12-23 09:28:30,314 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand 25 states. [2020-12-23 09:28:31,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:28:31,861 INFO L93 Difference]: Finished difference Result 116 states and 161 transitions. [2020-12-23 09:28:31,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 09:28:31,861 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-12-23 09:28:31,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:28:31,864 INFO L225 Difference]: With dead ends: 116 [2020-12-23 09:28:31,864 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 09:28:31,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=217, Invalid=1675, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 09:28:31,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 09:28:31,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-12-23 09:28:31,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 09:28:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 146 transitions. [2020-12-23 09:28:31,884 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 146 transitions. Word has length 57 [2020-12-23 09:28:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:28:31,884 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 146 transitions. [2020-12-23 09:28:31,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 09:28:31,885 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 146 transitions. [2020-12-23 09:28:31,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 09:28:31,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:28:31,887 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 09:28:32,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:28:32,101 INFO L429 AbstractCegarLoop]: === Iteration 7 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:28:32,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:28:32,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1292352465, now seen corresponding path program 2 times [2020-12-23 09:28:32,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:28:32,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903430288] [2020-12-23 09:28:32,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:28:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:32,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:32,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:28:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:32,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:28:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:32,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:28:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:32,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:28:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:32,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-23 09:28:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:32,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:32,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:28:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 09:28:32,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903430288] [2020-12-23 09:28:32,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852801335] [2020-12-23 09:28:32,545 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 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 09:28:32,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:28:32,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:28:32,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 09:28:32,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:28:32,732 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-23 09:28:32,733 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:32,737 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:32,737 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:28:32,738 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:10 [2020-12-23 09:28:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 09:28:33,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:28:33,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2020-12-23 09:28:33,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942079931] [2020-12-23 09:28:33,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 09:28:33,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:28:33,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 09:28:33,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-12-23 09:28:33,228 INFO L87 Difference]: Start difference. First operand 103 states and 146 transitions. Second operand 30 states. [2020-12-23 09:28:43,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:28:43,710 INFO L93 Difference]: Finished difference Result 163 states and 231 transitions. [2020-12-23 09:28:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 09:28:43,711 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 57 [2020-12-23 09:28:43,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:28:43,717 INFO L225 Difference]: With dead ends: 163 [2020-12-23 09:28:43,718 INFO L226 Difference]: Without dead ends: 142 [2020-12-23 09:28:43,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=271, Invalid=2699, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 09:28:43,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-23 09:28:43,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-12-23 09:28:43,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 09:28:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 156 transitions. [2020-12-23 09:28:43,743 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 156 transitions. Word has length 57 [2020-12-23 09:28:43,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:28:43,743 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 156 transitions. [2020-12-23 09:28:43,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 09:28:43,743 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 156 transitions. [2020-12-23 09:28:43,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 09:28:43,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:28:43,745 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:28:43,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 09:28:43,957 INFO L429 AbstractCegarLoop]: === Iteration 8 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:28:43,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:28:43,958 INFO L82 PathProgramCache]: Analyzing trace with hash -945278837, now seen corresponding path program 3 times [2020-12-23 09:28:43,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:28:43,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741692555] [2020-12-23 09:28:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:28:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:44,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:44,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:28:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:44,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:28:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:44,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:28:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:44,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:28:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:44,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-23 09:28:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:44,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:44,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:28:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:44,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:44,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:28:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-23 09:28:44,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741692555] [2020-12-23 09:28:44,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894643549] [2020-12-23 09:28:44,848 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 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 09:28:45,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 09:28:45,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:28:45,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-23 09:28:45,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:28:45,066 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 11 treesize of output 7 [2020-12-23 09:28:45,067 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:45,074 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:45,077 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 11 treesize of output 7 [2020-12-23 09:28:45,078 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:45,084 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:45,086 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:28:45,086 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-12-23 09:28:46,203 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:28:46,325 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2020-12-23 09:28:46,327 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:46,339 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:46,345 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-12-23 09:28:46,347 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:46,358 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:46,360 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 09:28:46,360 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:58, output treesize:28 [2020-12-23 09:28:46,681 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:28:46,684 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:28:46,689 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:28:46,692 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:28:46,695 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 09:28:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 09:28:46,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:28:46,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 49 [2020-12-23 09:28:46,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007371055] [2020-12-23 09:28:46,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 09:28:46,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:28:46,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 09:28:46,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2214, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 09:28:46,773 INFO L87 Difference]: Start difference. First operand 108 states and 156 transitions. Second operand 49 states. [2020-12-23 09:28:49,093 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-12-23 09:28:49,702 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-23 09:28:50,110 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-23 09:28:50,958 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-12-23 09:28:51,132 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-12-23 09:28:51,467 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-12-23 09:28:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:28:52,022 INFO L93 Difference]: Finished difference Result 223 states and 412 transitions. [2020-12-23 09:28:52,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 09:28:52,024 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 70 [2020-12-23 09:28:52,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:28:52,029 INFO L225 Difference]: With dead ends: 223 [2020-12-23 09:28:52,029 INFO L226 Difference]: Without dead ends: 221 [2020-12-23 09:28:52,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=512, Invalid=5650, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 09:28:52,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-23 09:28:52,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 151. [2020-12-23 09:28:52,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 09:28:52,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 245 transitions. [2020-12-23 09:28:52,092 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 245 transitions. Word has length 70 [2020-12-23 09:28:52,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:28:52,093 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 245 transitions. [2020-12-23 09:28:52,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 09:28:52,094 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 245 transitions. [2020-12-23 09:28:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 09:28:52,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:28:52,098 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:28:52,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:28:52,315 INFO L429 AbstractCegarLoop]: === Iteration 9 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:28:52,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:28:52,316 INFO L82 PathProgramCache]: Analyzing trace with hash -909256420, now seen corresponding path program 1 times [2020-12-23 09:28:52,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:28:52,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949072057] [2020-12-23 09:28:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:28:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:52,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:52,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:28:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:52,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:28:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:52,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:28:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:52,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:28:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:52,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-23 09:28:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:52,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:52,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:28:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:53,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:28:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:53,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:28:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-23 09:28:53,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949072057] [2020-12-23 09:28:53,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331021237] [2020-12-23 09:28:53,223 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 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 09:28:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:53,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 09:28:53,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:28:53,397 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 13 treesize of output 9 [2020-12-23 09:28:53,398 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:53,405 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:53,409 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 13 treesize of output 9 [2020-12-23 09:28:53,409 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:53,415 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:53,419 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:28:53,419 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:27, output treesize:1 [2020-12-23 09:28:54,059 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2020-12-23 09:28:54,060 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:54,068 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:54,074 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-12-23 09:28:54,075 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:54,081 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:54,082 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:28:54,082 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:45, output treesize:15 [2020-12-23 09:28:54,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:28:54,279 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:28:54,281 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:28:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-23 09:28:54,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:28:54,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 19] total 44 [2020-12-23 09:28:54,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713437331] [2020-12-23 09:28:54,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 09:28:54,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:28:54,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 09:28:54,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1787, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 09:28:54,352 INFO L87 Difference]: Start difference. First operand 151 states and 245 transitions. Second operand 44 states. [2020-12-23 09:28:57,831 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-23 09:28:58,068 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-12-23 09:29:00,452 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-12-23 09:29:01,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:29:01,204 INFO L93 Difference]: Finished difference Result 324 states and 604 transitions. [2020-12-23 09:29:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 09:29:01,207 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 71 [2020-12-23 09:29:01,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:29:01,215 INFO L225 Difference]: With dead ends: 324 [2020-12-23 09:29:01,216 INFO L226 Difference]: Without dead ends: 322 [2020-12-23 09:29:01,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=577, Invalid=6733, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 09:29:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-12-23 09:29:01,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 152. [2020-12-23 09:29:01,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 09:29:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 247 transitions. [2020-12-23 09:29:01,272 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 247 transitions. Word has length 71 [2020-12-23 09:29:01,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:29:01,273 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 247 transitions. [2020-12-23 09:29:01,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 09:29:01,273 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 247 transitions. [2020-12-23 09:29:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 09:29:01,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:29:01,275 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:29:01,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:29:01,490 INFO L429 AbstractCegarLoop]: === Iteration 10 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:29:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:29:01,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1931785932, now seen corresponding path program 2 times [2020-12-23 09:29:01,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:29:01,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388240289] [2020-12-23 09:29:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:29:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:01,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:01,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:29:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:01,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:29:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:01,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:29:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:01,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:29:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:01,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-23 09:29:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:01,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:01,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:29:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:01,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:01,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:29:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-23 09:29:01,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388240289] [2020-12-23 09:29:01,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274970771] [2020-12-23 09:29:01,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:29:01,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:29:01,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:29:01,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 09:29:01,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:29:01,962 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:29:01,964 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:29:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-23 09:29:02,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:29:02,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 19 [2020-12-23 09:29:02,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87593339] [2020-12-23 09:29:02,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 09:29:02,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:29:02,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 09:29:02,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-12-23 09:29:02,077 INFO L87 Difference]: Start difference. First operand 152 states and 247 transitions. Second operand 19 states. [2020-12-23 09:29:03,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:29:03,726 INFO L93 Difference]: Finished difference Result 343 states and 703 transitions. [2020-12-23 09:29:03,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 09:29:03,729 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2020-12-23 09:29:03,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:29:03,733 INFO L225 Difference]: With dead ends: 343 [2020-12-23 09:29:03,734 INFO L226 Difference]: Without dead ends: 228 [2020-12-23 09:29:03,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=365, Invalid=1705, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 09:29:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-12-23 09:29:03,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 183. [2020-12-23 09:29:03,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-23 09:29:03,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 309 transitions. [2020-12-23 09:29:03,773 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 309 transitions. Word has length 71 [2020-12-23 09:29:03,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:29:03,775 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 309 transitions. [2020-12-23 09:29:03,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 09:29:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 309 transitions. [2020-12-23 09:29:03,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:29:03,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:29:03,783 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:29:03,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 09:29:03,998 INFO L429 AbstractCegarLoop]: === Iteration 11 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:29:03,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:29:03,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1914561797, now seen corresponding path program 1 times [2020-12-23 09:29:03,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:29:03,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174621181] [2020-12-23 09:29:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:29:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:04,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:04,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:29:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:04,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:29:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:04,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:29:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:04,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:29:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:04,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-23 09:29:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:04,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:04,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:29:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:05,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:05,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:29:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-23 09:29:05,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174621181] [2020-12-23 09:29:05,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599833119] [2020-12-23 09:29:05,144 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 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 09:29:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:05,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-23 09:29:05,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:29:05,318 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 13 treesize of output 9 [2020-12-23 09:29:05,319 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:05,326 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:05,331 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 13 treesize of output 9 [2020-12-23 09:29:05,332 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:05,338 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:05,340 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:29:05,340 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:27, output treesize:1 [2020-12-23 09:29:05,823 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:29:05,836 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:29:05,838 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:29:06,378 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2020-12-23 09:29:06,380 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:06,387 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:06,390 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-12-23 09:29:06,391 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:06,397 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:06,398 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:29:06,398 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:13 [2020-12-23 09:29:06,652 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:29:06,655 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:29:06,656 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:29:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-23 09:29:06,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:29:06,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20] total 47 [2020-12-23 09:29:06,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356842062] [2020-12-23 09:29:06,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 09:29:06,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:29:06,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 09:29:06,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2052, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 09:29:06,734 INFO L87 Difference]: Start difference. First operand 183 states and 309 transitions. Second operand 47 states. [2020-12-23 09:29:08,828 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-12-23 09:29:09,893 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-23 09:29:10,288 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-23 09:29:10,505 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-23 09:29:10,815 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-12-23 09:29:11,325 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-12-23 09:29:11,548 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-12-23 09:29:11,804 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-12-23 09:29:12,135 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-12-23 09:29:12,420 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2020-12-23 09:29:13,865 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-12-23 09:29:14,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:29:14,563 INFO L93 Difference]: Finished difference Result 294 states and 546 transitions. [2020-12-23 09:29:14,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 09:29:14,564 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2020-12-23 09:29:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:29:14,568 INFO L225 Difference]: With dead ends: 294 [2020-12-23 09:29:14,568 INFO L226 Difference]: Without dead ends: 292 [2020-12-23 09:29:14,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=548, Invalid=5932, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 09:29:14,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-12-23 09:29:14,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 196. [2020-12-23 09:29:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-23 09:29:14,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 351 transitions. [2020-12-23 09:29:14,602 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 351 transitions. Word has length 72 [2020-12-23 09:29:14,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:29:14,603 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 351 transitions. [2020-12-23 09:29:14,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 09:29:14,603 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 351 transitions. [2020-12-23 09:29:14,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:29:14,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:29:14,606 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:29:14,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:29:14,822 INFO L429 AbstractCegarLoop]: === Iteration 12 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:29:14,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:29:14,823 INFO L82 PathProgramCache]: Analyzing trace with hash 872853690, now seen corresponding path program 1 times [2020-12-23 09:29:14,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:29:14,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396994252] [2020-12-23 09:29:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:29:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:15,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:15,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:29:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:15,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:29:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:15,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:29:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:15,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:29:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:15,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-23 09:29:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:15,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:15,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:29:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:15,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:15,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:29:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 09:29:15,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396994252] [2020-12-23 09:29:15,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574777790] [2020-12-23 09:29:15,698 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 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 09:29:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:15,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 09:29:15,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:29:15,846 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 13 treesize of output 9 [2020-12-23 09:29:15,847 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:15,853 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:15,856 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 13 treesize of output 9 [2020-12-23 09:29:15,857 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:15,863 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:15,864 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:29:15,864 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:27, output treesize:1 [2020-12-23 09:29:16,626 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2020-12-23 09:29:16,628 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:16,634 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:16,637 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-12-23 09:29:16,638 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:16,641 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:16,642 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:29:16,642 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:7 [2020-12-23 09:29:16,813 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:29:16,815 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:29:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-23 09:29:16,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:29:16,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 42 [2020-12-23 09:29:16,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332368585] [2020-12-23 09:29:16,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 09:29:16,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:29:16,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 09:29:16,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1617, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 09:29:16,880 INFO L87 Difference]: Start difference. First operand 196 states and 351 transitions. Second operand 42 states. [2020-12-23 09:29:20,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:29:20,686 INFO L93 Difference]: Finished difference Result 263 states and 462 transitions. [2020-12-23 09:29:20,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 09:29:20,687 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 72 [2020-12-23 09:29:20,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:29:20,690 INFO L225 Difference]: With dead ends: 263 [2020-12-23 09:29:20,690 INFO L226 Difference]: Without dead ends: 261 [2020-12-23 09:29:20,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=323, Invalid=3709, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 09:29:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-12-23 09:29:20,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 179. [2020-12-23 09:29:20,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-23 09:29:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 304 transitions. [2020-12-23 09:29:20,718 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 304 transitions. Word has length 72 [2020-12-23 09:29:20,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:29:20,718 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 304 transitions. [2020-12-23 09:29:20,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 09:29:20,719 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 304 transitions. [2020-12-23 09:29:20,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 09:29:20,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:29:20,722 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:29:20,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:29:20,937 INFO L429 AbstractCegarLoop]: === Iteration 13 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:29:20,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:29:20,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1479239555, now seen corresponding path program 3 times [2020-12-23 09:29:20,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:29:20,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813024934] [2020-12-23 09:29:20,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:29:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:21,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:21,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:29:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:21,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:29:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:21,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:29:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:21,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-23 09:29:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:21,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-23 09:29:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:21,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:21,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:21,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:29:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:21,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-12-23 09:29:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:21,640 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-23 09:29:21,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813024934] [2020-12-23 09:29:21,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900703145] [2020-12-23 09:29:21,640 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:29:21,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 09:29:21,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:29:21,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 95 conjunts are in the unsatisfiable core [2020-12-23 09:29:21,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:29:21,897 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 13 treesize of output 9 [2020-12-23 09:29:21,898 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:21,904 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:21,906 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:29:21,906 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2020-12-23 09:29:21,946 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 11 treesize of output 7 [2020-12-23 09:29:21,947 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:21,954 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:21,958 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 11 treesize of output 7 [2020-12-23 09:29:21,959 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:21,968 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:21,970 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:29:21,971 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-12-23 09:29:22,434 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2020-12-23 09:29:22,436 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:22,441 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:22,444 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-12-23 09:29:22,454 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:22,457 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:22,457 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:29:22,457 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2020-12-23 09:29:22,475 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:29:22,477 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:29:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 09:29:22,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:29:22,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 33 [2020-12-23 09:29:22,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261356237] [2020-12-23 09:29:22,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 09:29:22,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:29:22,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 09:29:22,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 09:29:22,531 INFO L87 Difference]: Start difference. First operand 179 states and 304 transitions. Second operand 33 states. [2020-12-23 09:29:24,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:29:24,932 INFO L93 Difference]: Finished difference Result 215 states and 364 transitions. [2020-12-23 09:29:24,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 09:29:24,934 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-12-23 09:29:24,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:29:24,937 INFO L225 Difference]: With dead ends: 215 [2020-12-23 09:29:24,937 INFO L226 Difference]: Without dead ends: 213 [2020-12-23 09:29:24,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=291, Invalid=2679, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 09:29:24,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-23 09:29:24,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 198. [2020-12-23 09:29:24,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 09:29:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 335 transitions. [2020-12-23 09:29:24,963 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 335 transitions. Word has length 70 [2020-12-23 09:29:24,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:29:24,963 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 335 transitions. [2020-12-23 09:29:24,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 09:29:24,963 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 335 transitions. [2020-12-23 09:29:24,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 09:29:24,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:29:24,966 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:29:25,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 09:29:25,181 INFO L429 AbstractCegarLoop]: === Iteration 14 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:29:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:29:25,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1086227410, now seen corresponding path program 1 times [2020-12-23 09:29:25,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:29:25,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470221869] [2020-12-23 09:29:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:29:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:25,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:25,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:29:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:25,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:29:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:25,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:29:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:25,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-23 09:29:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:25,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-23 09:29:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:25,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:26,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:26,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:29:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:26,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-12-23 09:29:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 09:29:26,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470221869] [2020-12-23 09:29:26,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647843675] [2020-12-23 09:29:26,143 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:29:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:26,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-23 09:29:26,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:29:26,313 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 13 treesize of output 9 [2020-12-23 09:29:26,314 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:26,320 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:26,323 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 13 treesize of output 9 [2020-12-23 09:29:26,324 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:26,330 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:26,332 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:29:26,333 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:1 [2020-12-23 09:29:27,311 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2020-12-23 09:29:27,312 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:27,321 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:27,325 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-12-23 09:29:27,326 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:27,333 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:27,334 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:29:27,334 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:45, output treesize:15 [2020-12-23 09:29:27,571 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:29:27,574 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:29:27,576 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:29:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 09:29:27,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:29:27,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20] total 44 [2020-12-23 09:29:27,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023837718] [2020-12-23 09:29:27,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 09:29:27,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:29:27,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 09:29:27,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1787, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 09:29:27,655 INFO L87 Difference]: Start difference. First operand 198 states and 335 transitions. Second operand 44 states. [2020-12-23 09:29:30,509 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-23 09:29:30,701 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-23 09:29:30,937 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-12-23 09:29:32,510 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-23 09:29:33,003 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-12-23 09:29:34,414 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-23 09:29:35,403 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-12-23 09:29:36,446 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-12-23 09:29:37,891 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-12-23 09:29:38,073 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-12-23 09:29:38,290 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-23 09:29:41,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:29:41,412 INFO L93 Difference]: Finished difference Result 565 states and 1188 transitions. [2020-12-23 09:29:41,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-12-23 09:29:41,413 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 71 [2020-12-23 09:29:41,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:29:41,422 INFO L225 Difference]: With dead ends: 565 [2020-12-23 09:29:41,422 INFO L226 Difference]: Without dead ends: 563 [2020-12-23 09:29:41,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4483 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1326, Invalid=15704, Unknown=0, NotChecked=0, Total=17030 [2020-12-23 09:29:41,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2020-12-23 09:29:41,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 331. [2020-12-23 09:29:41,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-12-23 09:29:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 731 transitions. [2020-12-23 09:29:41,496 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 731 transitions. Word has length 71 [2020-12-23 09:29:41,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:29:41,496 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 731 transitions. [2020-12-23 09:29:41,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 09:29:41,496 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 731 transitions. [2020-12-23 09:29:41,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 09:29:41,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:29:41,502 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:29:41,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 09:29:41,715 INFO L429 AbstractCegarLoop]: === Iteration 15 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:29:41,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:29:41,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1479346186, now seen corresponding path program 1 times [2020-12-23 09:29:41,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:29:41,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733823960] [2020-12-23 09:29:41,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:29:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:42,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:42,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:29:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:42,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:29:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:42,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:29:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:42,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:29:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:42,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-23 09:29:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:42,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:42,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:29:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:42,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:29:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:42,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:29:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-23 09:29:42,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733823960] [2020-12-23 09:29:42,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13000585] [2020-12-23 09:29:42,645 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:29:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:29:42,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 97 conjunts are in the unsatisfiable core [2020-12-23 09:29:42,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:29:42,863 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 13 treesize of output 9 [2020-12-23 09:29:42,864 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:42,876 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:42,881 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 13 treesize of output 9 [2020-12-23 09:29:42,882 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:42,893 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:42,895 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:29:42,896 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:33, output treesize:19 [2020-12-23 09:29:45,583 WARN L197 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 24 [2020-12-23 09:29:47,713 WARN L197 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 26 [2020-12-23 09:29:49,939 WARN L197 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 29 [2020-12-23 09:29:50,620 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:50,621 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 62 [2020-12-23 09:29:50,623 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-23 09:29:50,626 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-23 09:29:50,627 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 09:29:50,647 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:50,658 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:29:50,659 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 46 [2020-12-23 09:29:50,662 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-23 09:29:50,662 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-23 09:29:50,667 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-23 09:29:50,671 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:29:50,702 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-12-23 09:29:50,706 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:29:50,707 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:7 [2020-12-23 09:29:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 09:29:50,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:29:50,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 44 [2020-12-23 09:29:50,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265764693] [2020-12-23 09:29:50,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 09:29:50,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:29:50,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 09:29:50,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1743, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 09:29:50,750 INFO L87 Difference]: Start difference. First operand 331 states and 731 transitions. Second operand 44 states. [2020-12-23 09:29:56,162 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-23 09:30:00,350 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-23 09:30:00,974 WARN L197 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-12-23 09:30:01,701 WARN L197 SmtUtils]: Spent 635.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-23 09:30:03,820 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 47 [2020-12-23 09:30:08,005 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-12-23 09:30:12,278 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-23 09:30:14,542 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 54 [2020-12-23 09:30:17,322 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 50 [2020-12-23 09:30:19,505 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 46 [2020-12-23 09:30:22,919 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 43 [2020-12-23 09:30:23,857 WARN L197 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-12-23 09:30:28,086 WARN L197 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-23 09:30:32,296 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-23 09:30:32,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:30:32,704 INFO L93 Difference]: Finished difference Result 540 states and 1237 transitions. [2020-12-23 09:30:32,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 09:30:32,706 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 76 [2020-12-23 09:30:32,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:30:32,716 INFO L225 Difference]: With dead ends: 540 [2020-12-23 09:30:32,716 INFO L226 Difference]: Without dead ends: 528 [2020-12-23 09:30:32,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 46.9s TimeCoverageRelationStatistics Valid=514, Invalid=5036, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 09:30:32,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2020-12-23 09:30:32,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 444. [2020-12-23 09:30:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-12-23 09:30:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1017 transitions. [2020-12-23 09:30:32,827 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1017 transitions. Word has length 76 [2020-12-23 09:30:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:30:32,827 INFO L481 AbstractCegarLoop]: Abstraction has 444 states and 1017 transitions. [2020-12-23 09:30:32,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 09:30:32,828 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1017 transitions. [2020-12-23 09:30:32,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 09:30:32,835 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:30:32,835 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:30:33,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 09:30:33,051 INFO L429 AbstractCegarLoop]: === Iteration 16 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:30:33,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:30:33,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1595709832, now seen corresponding path program 4 times [2020-12-23 09:30:33,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:30:33,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629571776] [2020-12-23 09:30:33,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:30:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:33,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:30:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:33,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:30:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:33,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:30:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:33,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:30:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:33,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:30:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:33,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-23 09:30:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:33,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:30:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:33,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:30:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:33,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:30:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:33,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:30:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 09:30:33,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629571776] [2020-12-23 09:30:33,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533956168] [2020-12-23 09:30:33,874 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:30:34,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:30:34,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:30:34,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 99 conjunts are in the unsatisfiable core [2020-12-23 09:30:34,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:30:34,181 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 11 treesize of output 7 [2020-12-23 09:30:34,182 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:30:34,190 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:30:34,197 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 11 treesize of output 7 [2020-12-23 09:30:34,198 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:30:34,207 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:30:34,209 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:30:34,209 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:26, output treesize:11 [2020-12-23 09:30:35,252 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 09:30:35,271 INFO L348 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2020-12-23 09:30:35,272 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 41 [2020-12-23 09:30:35,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:30:35,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:30:35,277 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 09:30:35,296 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:30:35,330 INFO L348 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2020-12-23 09:30:35,331 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2020-12-23 09:30:35,332 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:30:35,344 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:30:35,347 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:30:35,347 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:7 [2020-12-23 09:30:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 09:30:35,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:30:35,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 36 [2020-12-23 09:30:35,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325208703] [2020-12-23 09:30:35,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 09:30:35,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:30:35,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 09:30:35,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 09:30:35,384 INFO L87 Difference]: Start difference. First operand 444 states and 1017 transitions. Second operand 36 states. [2020-12-23 09:30:40,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:30:40,982 INFO L93 Difference]: Finished difference Result 1221 states and 3477 transitions. [2020-12-23 09:30:40,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 09:30:40,983 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-12-23 09:30:40,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:30:41,000 INFO L225 Difference]: With dead ends: 1221 [2020-12-23 09:30:41,000 INFO L226 Difference]: Without dead ends: 874 [2020-12-23 09:30:41,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=469, Invalid=4933, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 09:30:41,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-12-23 09:30:41,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 706. [2020-12-23 09:30:41,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2020-12-23 09:30:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1905 transitions. [2020-12-23 09:30:41,148 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1905 transitions. Word has length 76 [2020-12-23 09:30:41,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:30:41,149 INFO L481 AbstractCegarLoop]: Abstraction has 706 states and 1905 transitions. [2020-12-23 09:30:41,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 09:30:41,149 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1905 transitions. [2020-12-23 09:30:41,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:30:41,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:30:41,159 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:30:41,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:30:41,373 INFO L429 AbstractCegarLoop]: === Iteration 17 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:30:41,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:30:41,373 INFO L82 PathProgramCache]: Analyzing trace with hash 191480931, now seen corresponding path program 1 times [2020-12-23 09:30:41,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:30:41,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577155752] [2020-12-23 09:30:41,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:30:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:41,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:30:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:41,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:30:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:41,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:30:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:41,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:30:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:41,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-23 09:30:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:41,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-23 09:30:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:42,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:30:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:42,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:30:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:42,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:30:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:42,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-12-23 09:30:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 09:30:42,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577155752] [2020-12-23 09:30:42,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090900690] [2020-12-23 09:30:42,499 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:30:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:42,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 94 conjunts are in the unsatisfiable core [2020-12-23 09:30:42,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:30:42,643 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 13 treesize of output 9 [2020-12-23 09:30:42,645 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:30:42,652 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:30:42,656 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 13 treesize of output 9 [2020-12-23 09:30:42,657 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:30:42,664 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:30:42,666 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:30:42,666 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:1 [2020-12-23 09:30:43,119 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:30:43,122 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:30:43,612 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:30:43,616 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:30:44,272 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2020-12-23 09:30:44,274 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:30:44,283 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:30:44,286 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-12-23 09:30:44,287 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:30:44,295 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:30:44,295 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:30:44,296 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:13 [2020-12-23 09:30:44,580 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:30:44,583 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:30:44,584 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:30:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-23 09:30:44,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:30:44,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28] total 53 [2020-12-23 09:30:44,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544783504] [2020-12-23 09:30:44,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 09:30:44,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:30:44,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 09:30:44,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2616, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 09:30:44,678 INFO L87 Difference]: Start difference. First operand 706 states and 1905 transitions. Second operand 53 states. [2020-12-23 09:30:46,963 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-12-23 09:30:48,344 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-12-23 09:30:48,621 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-12-23 09:30:49,821 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-12-23 09:30:51,499 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-12-23 09:30:51,912 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-23 09:30:52,086 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-12-23 09:30:52,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:30:52,432 INFO L93 Difference]: Finished difference Result 800 states and 2235 transitions. [2020-12-23 09:30:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 09:30:52,433 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 72 [2020-12-23 09:30:52,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:30:52,448 INFO L225 Difference]: With dead ends: 800 [2020-12-23 09:30:52,449 INFO L226 Difference]: Without dead ends: 798 [2020-12-23 09:30:52,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=732, Invalid=8010, Unknown=0, NotChecked=0, Total=8742 [2020-12-23 09:30:52,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2020-12-23 09:30:52,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 706. [2020-12-23 09:30:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2020-12-23 09:30:52,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1905 transitions. [2020-12-23 09:30:52,638 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1905 transitions. Word has length 72 [2020-12-23 09:30:52,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:30:52,638 INFO L481 AbstractCegarLoop]: Abstraction has 706 states and 1905 transitions. [2020-12-23 09:30:52,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 09:30:52,639 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1905 transitions. [2020-12-23 09:30:52,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 09:30:52,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:30:52,654 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:30:52,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 09:30:52,870 INFO L429 AbstractCegarLoop]: === Iteration 18 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:30:52,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:30:52,871 INFO L82 PathProgramCache]: Analyzing trace with hash 181678716, now seen corresponding path program 4 times [2020-12-23 09:30:52,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:30:52,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515385277] [2020-12-23 09:30:52,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:30:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:53,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:30:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:53,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:30:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:53,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:30:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:53,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:30:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:53,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-23 09:30:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:53,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-23 09:30:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:53,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:30:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:53,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:30:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:54,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:30:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:54,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-12-23 09:30:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:30:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 27 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 09:30:54,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515385277] [2020-12-23 09:30:54,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22025315] [2020-12-23 09:30:54,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:30:54,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:30:54,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:30:54,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 94 conjunts are in the unsatisfiable core [2020-12-23 09:30:54,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:30:54,241 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 13 treesize of output 9 [2020-12-23 09:30:54,241 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:30:54,244 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:30:54,245 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:30:54,245 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:1 [2020-12-23 09:30:54,258 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 13 treesize of output 9 [2020-12-23 09:30:54,259 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:30:54,265 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:30:54,269 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 13 treesize of output 9 [2020-12-23 09:30:54,270 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:30:54,276 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:30:54,278 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:30:54,278 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:1 [2020-12-23 09:30:55,669 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:30:55,670 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 62 [2020-12-23 09:30:55,672 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-23 09:30:55,673 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-23 09:30:55,674 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 09:30:55,693 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:30:55,705 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:30:55,706 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 38 [2020-12-23 09:30:55,708 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 09:30:55,709 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 09:30:55,711 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:30:55,715 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:30:55,716 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:30:55,717 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:85, output treesize:7 [2020-12-23 09:30:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 28 proven. 34 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 09:30:55,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:30:55,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19] total 39 [2020-12-23 09:30:55,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834175346] [2020-12-23 09:30:55,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 09:30:55,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:30:55,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 09:30:55,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 09:30:55,741 INFO L87 Difference]: Start difference. First operand 706 states and 1905 transitions. Second operand 39 states. [2020-12-23 09:31:01,825 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-12-23 09:31:03,044 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-12-23 09:31:09,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:09,430 INFO L93 Difference]: Finished difference Result 1273 states and 4505 transitions. [2020-12-23 09:31:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 09:31:09,431 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2020-12-23 09:31:09,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:09,461 INFO L225 Difference]: With dead ends: 1273 [2020-12-23 09:31:09,461 INFO L226 Difference]: Without dead ends: 1256 [2020-12-23 09:31:09,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=552, Invalid=5148, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 09:31:09,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2020-12-23 09:31:09,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1161. [2020-12-23 09:31:09,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1161 states. [2020-12-23 09:31:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 4244 transitions. [2020-12-23 09:31:09,950 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 4244 transitions. Word has length 76 [2020-12-23 09:31:09,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:09,953 INFO L481 AbstractCegarLoop]: Abstraction has 1161 states and 4244 transitions. [2020-12-23 09:31:09,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 09:31:09,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 4244 transitions. [2020-12-23 09:31:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 09:31:09,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:09,970 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:10,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 09:31:10,184 INFO L429 AbstractCegarLoop]: === Iteration 19 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:10,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:10,185 INFO L82 PathProgramCache]: Analyzing trace with hash 298042362, now seen corresponding path program 2 times [2020-12-23 09:31:10,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:10,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219120555] [2020-12-23 09:31:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:10,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:31:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:10,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:31:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:10,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:31:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:10,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:31:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:10,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-23 09:31:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:10,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-23 09:31:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:11,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:31:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:11,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:31:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:11,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:31:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:11,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-12-23 09:31:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 09:31:11,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219120555] [2020-12-23 09:31:11,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706561674] [2020-12-23 09:31:11,384 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:31:11,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:31:11,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:31:11,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 97 conjunts are in the unsatisfiable core [2020-12-23 09:31:11,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:31:11,606 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 13 treesize of output 9 [2020-12-23 09:31:11,607 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:31:11,615 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:31:11,616 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:31:11,616 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2020-12-23 09:31:11,701 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 09:31:11,701 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 32 treesize of output 25 [2020-12-23 09:31:11,703 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:31:11,713 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:31:11,715 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:31:11,715 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:19 [2020-12-23 09:31:14,552 WARN L197 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 24 [2020-12-23 09:31:16,688 WARN L197 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 29 [2020-12-23 09:31:18,908 WARN L197 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 31 [2020-12-23 09:31:19,828 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:31:19,828 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 62 [2020-12-23 09:31:19,831 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-23 09:31:19,834 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-23 09:31:19,835 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 09:31:19,860 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:31:19,872 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:31:19,872 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 46 [2020-12-23 09:31:19,874 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-23 09:31:19,875 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-23 09:31:19,877 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-23 09:31:19,879 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:31:19,893 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:31:19,896 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:31:19,897 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:7 [2020-12-23 09:31:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 35 proven. 38 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-23 09:31:19,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:31:19,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 47 [2020-12-23 09:31:19,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018193083] [2020-12-23 09:31:19,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 09:31:19,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:19,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 09:31:19,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2006, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 09:31:19,929 INFO L87 Difference]: Start difference. First operand 1161 states and 4244 transitions. Second operand 47 states. [2020-12-23 09:31:29,326 WARN L197 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 45 [2020-12-23 09:31:30,447 WARN L197 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 41 [2020-12-23 09:31:33,141 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 44 [2020-12-23 09:31:34,486 WARN L197 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 50 [2020-12-23 09:31:35,888 WARN L197 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 52 [2020-12-23 09:31:38,930 WARN L197 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-12-23 09:31:41,436 WARN L197 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-12-23 09:31:44,922 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 48 [2020-12-23 09:31:47,064 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 52 [2020-12-23 09:31:51,240 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 59 [2020-12-23 09:31:51,884 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-23 09:31:52,050 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-23 09:31:52,290 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-23 09:31:52,458 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-23 09:31:55,355 WARN L197 SmtUtils]: Spent 2.52 s on a formula simplification that was a NOOP. DAG size: 61 [2020-12-23 09:31:59,468 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 57 [2020-12-23 09:32:03,767 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-12-23 09:32:07,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:07,065 INFO L93 Difference]: Finished difference Result 2046 states and 10099 transitions. [2020-12-23 09:32:07,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 09:32:07,066 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 76 [2020-12-23 09:32:07,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:07,142 INFO L225 Difference]: With dead ends: 2046 [2020-12-23 09:32:07,142 INFO L226 Difference]: Without dead ends: 2021 [2020-12-23 09:32:07,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=771, Invalid=7971, Unknown=0, NotChecked=0, Total=8742 [2020-12-23 09:32:07,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2020-12-23 09:32:08,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1575. [2020-12-23 09:32:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1575 states. [2020-12-23 09:32:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 6842 transitions. [2020-12-23 09:32:08,226 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 6842 transitions. Word has length 76 [2020-12-23 09:32:08,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:08,226 INFO L481 AbstractCegarLoop]: Abstraction has 1575 states and 6842 transitions. [2020-12-23 09:32:08,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 09:32:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 6842 transitions. [2020-12-23 09:32:08,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 09:32:08,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:08,257 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:08,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:32:08,472 INFO L429 AbstractCegarLoop]: === Iteration 20 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:08,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:08,473 INFO L82 PathProgramCache]: Analyzing trace with hash -560347655, now seen corresponding path program 5 times [2020-12-23 09:32:08,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:08,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530408096] [2020-12-23 09:32:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:08,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:32:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:09,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:32:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:09,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:32:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:09,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:32:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:09,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:32:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:09,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-23 09:32:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:09,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 09:32:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:09,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-23 09:32:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:09,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:32:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:09,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:32:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:09,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:32:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:09,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:32:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:09,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:32:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:09,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-23 09:32:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 50 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-23 09:32:09,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530408096] [2020-12-23 09:32:09,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357112557] [2020-12-23 09:32:09,936 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:32:10,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 09:32:10,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:32:10,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 127 conjunts are in the unsatisfiable core [2020-12-23 09:32:10,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:32:10,415 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 11 treesize of output 7 [2020-12-23 09:32:10,415 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:32:10,423 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:32:10,427 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 11 treesize of output 7 [2020-12-23 09:32:10,429 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:32:10,436 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:32:10,438 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:32:10,439 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:26, output treesize:11 [2020-12-23 09:32:13,492 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 09:32:13,498 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:32:13,499 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 47 [2020-12-23 09:32:13,501 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:32:13,502 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:32:13,503 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 09:32:13,522 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:32:13,537 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:32:13,537 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2020-12-23 09:32:13,539 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 09:32:13,562 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:32:13,579 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:32:13,579 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:32:13,582 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:32:13,582 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:84, output treesize:15 [2020-12-23 09:32:13,905 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:32:13,907 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:32:13,908 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:32:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 42 proven. 67 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 09:32:14,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:32:14,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 35] total 59 [2020-12-23 09:32:14,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047975175] [2020-12-23 09:32:14,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 09:32:14,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:14,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 09:32:14,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3236, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 09:32:14,031 INFO L87 Difference]: Start difference. First operand 1575 states and 6842 transitions. Second operand 59 states.