/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-fpi/s4if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:24:16,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:24:16,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:24:16,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:24:16,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:24:16,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:24:16,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:24:16,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:24:16,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:24:16,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:24:16,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:24:16,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:24:16,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:24:16,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:24:16,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:24:16,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:24:16,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:24:16,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:24:16,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:24:16,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:24:16,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:24:16,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:24:16,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:24:16,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:24:16,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:24:16,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 11:24:16,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 11:24:16,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 11:24:16,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 11:24:16,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 11:24:16,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 11:24:16,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 11:24:16,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 11:24:16,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:24:16,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:24:16,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:24:16,302 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 11:24:16,353 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:24:16,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:24:16,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:24:16,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:24:16,359 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:24:16,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:24:16,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:24:16,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:24:16,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:24:16,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:24:16,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:24:16,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:24:16,363 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:24:16,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:24:16,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:24:16,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:24:16,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:24:16,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:24:16,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:24:16,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:24:16,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:24:16,365 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:24:16,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:24:16,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:24:16,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:24:16,366 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:24:16,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:24:16,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:24:16,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:24:16,807 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:24:16,808 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:24:16,809 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s4if.c [2021-01-06 11:24:16,905 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/438e08dcc/be4d5fade0e84eb283023a2b1bb27a16/FLAG78d6f6b96 [2021-01-06 11:24:17,553 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:24:17,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/s4if.c [2021-01-06 11:24:17,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/438e08dcc/be4d5fade0e84eb283023a2b1bb27a16/FLAG78d6f6b96 [2021-01-06 11:24:17,934 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/438e08dcc/be4d5fade0e84eb283023a2b1bb27a16 [2021-01-06 11:24:17,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:24:17,942 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:24:17,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:24:17,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:24:17,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:24:17,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:24:17" (1/1) ... [2021-01-06 11:24:17,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b4cf77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:24:17, skipping insertion in model container [2021-01-06 11:24:17,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:24:17" (1/1) ... [2021-01-06 11:24:17,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:24:17,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:24:18,263 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/s4if.c[587,600] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~sum~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~sum~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~sum~0,],[IntegerLiteral[0]]] [2021-01-06 11:24:18,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:24:18,318 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:24:18,341 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/s4if.c[587,600] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sum~0,],base],StructAccessExpression[IdentifierExpression[~#sum~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sum~0,],base],StructAccessExpression[IdentifierExpression[~#sum~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sum~0,],base],StructAccessExpression[IdentifierExpression[~#sum~0,],offset]]] [2021-01-06 11:24:18,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:24:18,402 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:24:18,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:24:18 WrapperNode [2021-01-06 11:24:18,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:24:18,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:24:18,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:24:18,406 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:24:18,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:24:18" (1/1) ... [2021-01-06 11:24:18,439 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:24:18" (1/1) ... [2021-01-06 11:24:18,477 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:24:18,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:24:18,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:24:18,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:24:18,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:24:18" (1/1) ... [2021-01-06 11:24:18,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:24:18" (1/1) ... [2021-01-06 11:24:18,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:24:18" (1/1) ... [2021-01-06 11:24:18,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:24:18" (1/1) ... [2021-01-06 11:24:18,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:24:18" (1/1) ... [2021-01-06 11:24:18,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:24:18" (1/1) ... [2021-01-06 11:24:18,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:24:18" (1/1) ... [2021-01-06 11:24:18,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:24:18,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:24:18,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:24:18,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:24:18,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:24:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:24:18,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:24:18,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:24:18,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 11:24:18,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 11:24:18,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:24:18,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:24:18,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 11:24:18,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 11:24:19,215 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:24:19,215 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 11:24:19,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:24:19 BoogieIcfgContainer [2021-01-06 11:24:19,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:24:19,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:24:19,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:24:19,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:24:19,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:24:17" (1/3) ... [2021-01-06 11:24:19,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d8261e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:24:19, skipping insertion in model container [2021-01-06 11:24:19,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:24:18" (2/3) ... [2021-01-06 11:24:19,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d8261e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:24:19, skipping insertion in model container [2021-01-06 11:24:19,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:24:19" (3/3) ... [2021-01-06 11:24:19,231 INFO L111 eAbstractionObserver]: Analyzing ICFG s4if.c [2021-01-06 11:24:19,239 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:24:19,246 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:24:19,328 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:24:19,360 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:24:19,360 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:24:19,360 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:24:19,361 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:24:19,361 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:24:19,361 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:24:19,361 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:24:19,361 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:24:19,382 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2021-01-06 11:24:19,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 11:24:19,389 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:19,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:19,390 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:19,399 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2021-01-06 11:24:19,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:19,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078550245] [2021-01-06 11:24:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:19,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078550245] [2021-01-06 11:24:19,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:24:19,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 11:24:19,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735628279] [2021-01-06 11:24:19,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 11:24:19,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:19,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 11:24:19,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:24:19,623 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2021-01-06 11:24:19,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:24:19,642 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-01-06 11:24:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 11:24:19,644 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 11:24:19,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:24:19,653 INFO L225 Difference]: With dead ends: 34 [2021-01-06 11:24:19,654 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 11:24:19,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:24:19,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 11:24:19,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 11:24:19,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 11:24:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-01-06 11:24:19,696 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-01-06 11:24:19,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:24:19,696 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-01-06 11:24:19,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 11:24:19,697 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-01-06 11:24:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 11:24:19,698 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:19,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:19,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:24:19,698 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:19,700 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2021-01-06 11:24:19,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:19,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581832195] [2021-01-06 11:24:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:19,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581832195] [2021-01-06 11:24:19,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:24:19,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 11:24:19,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763038847] [2021-01-06 11:24:19,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:24:19,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:19,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:24:19,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:24:19,826 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2021-01-06 11:24:19,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:24:19,927 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-01-06 11:24:19,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:24:19,928 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-01-06 11:24:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:24:19,929 INFO L225 Difference]: With dead ends: 28 [2021-01-06 11:24:19,929 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 11:24:19,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:24:19,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 11:24:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-01-06 11:24:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 11:24:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-01-06 11:24:19,936 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-01-06 11:24:19,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:24:19,936 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-01-06 11:24:19,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:24:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-01-06 11:24:19,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 11:24:19,937 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:19,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:19,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 11:24:19,938 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:19,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:19,939 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2021-01-06 11:24:19,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:19,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009830264] [2021-01-06 11:24:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:20,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009830264] [2021-01-06 11:24:20,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224014061] [2021-01-06 11:24:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:20,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 11:24:20,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:24:20,704 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 11:24:20,718 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:20,760 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:20,783 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 11 treesize of output 7 [2021-01-06 11:24:20,784 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:20,807 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:20,811 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:20,813 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2021-01-06 11:24:20,892 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 [2021-01-06 11:24:20,896 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:20,920 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:20,922 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:20,923 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-01-06 11:24:21,451 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:21,452 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2021-01-06 11:24:21,457 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:21,496 INFO L625 ElimStorePlain]: treesize reduction 28, result has 65.4 percent of original size [2021-01-06 11:24:21,513 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:21,513 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:53 [2021-01-06 11:24:21,683 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:24:21,694 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:24:21,696 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:24:21,702 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:24:21,709 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:24:21,711 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:24:21,722 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 11:24:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:21,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:24:21,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-01-06 11:24:21,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850760439] [2021-01-06 11:24:21,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 11:24:21,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:21,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 11:24:21,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:24:21,758 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 18 states. [2021-01-06 11:24:22,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:24:22,486 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-01-06 11:24:22,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 11:24:22,487 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2021-01-06 11:24:22,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:24:22,489 INFO L225 Difference]: With dead ends: 35 [2021-01-06 11:24:22,489 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 11:24:22,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:24:22,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 11:24:22,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-01-06 11:24:22,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 11:24:22,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-01-06 11:24:22,498 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2021-01-06 11:24:22,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:24:22,498 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-01-06 11:24:22,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 11:24:22,498 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-01-06 11:24:22,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 11:24:22,499 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:22,499 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:22,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 11:24:22,713 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:22,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:22,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2021-01-06 11:24:22,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:22,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709349728] [2021-01-06 11:24:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:22,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709349728] [2021-01-06 11:24:22,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841543106] [2021-01-06 11:24:22,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:22,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:24:22,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:24:22,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:24:22,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:24:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:22,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:24:22,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 11:24:22,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203677277] [2021-01-06 11:24:22,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:24:22,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:22,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:24:22,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:24:22,959 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 10 states. [2021-01-06 11:24:23,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:24:23,143 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-01-06 11:24:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:24:23,144 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2021-01-06 11:24:23,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:24:23,145 INFO L225 Difference]: With dead ends: 33 [2021-01-06 11:24:23,145 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 11:24:23,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:24:23,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 11:24:23,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-01-06 11:24:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 11:24:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-01-06 11:24:23,161 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2021-01-06 11:24:23,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:24:23,162 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-01-06 11:24:23,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:24:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-01-06 11:24:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 11:24:23,163 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:23,163 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:23,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:23,378 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:23,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:23,379 INFO L82 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2021-01-06 11:24:23,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:23,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141400711] [2021-01-06 11:24:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:23,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141400711] [2021-01-06 11:24:23,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248113071] [2021-01-06 11:24:23,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:23,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 11:24:23,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:24:23,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:24:23,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:24:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:23,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:24:23,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 11:24:23,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408411151] [2021-01-06 11:24:23,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:24:23,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:23,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:24:23,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:24:23,605 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 10 states. [2021-01-06 11:24:23,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:24:23,717 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-01-06 11:24:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:24:23,718 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2021-01-06 11:24:23,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:24:23,719 INFO L225 Difference]: With dead ends: 37 [2021-01-06 11:24:23,719 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 11:24:23,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 11:24:23,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 11:24:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-01-06 11:24:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 11:24:23,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-01-06 11:24:23,725 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2021-01-06 11:24:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:24:23,726 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-01-06 11:24:23,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:24:23,726 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-01-06 11:24:23,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 11:24:23,727 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:23,727 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:23,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:23,941 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:23,942 INFO L82 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2021-01-06 11:24:23,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:23,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320550285] [2021-01-06 11:24:23,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:24,344 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-01-06 11:24:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:24,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320550285] [2021-01-06 11:24:24,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646524864] [2021-01-06 11:24:24,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:24,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:24:24,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:24:24,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 11:24:24,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:24:24,915 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 11:24:24,918 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:24,924 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:24,929 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 11 treesize of output 7 [2021-01-06 11:24:24,930 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:24,936 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:24,937 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:24,937 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2021-01-06 11:24:24,970 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 [2021-01-06 11:24:24,972 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:24,981 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:24,982 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:24,983 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-01-06 11:24:25,065 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:25,066 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2021-01-06 11:24:25,069 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:25,101 INFO L625 ElimStorePlain]: treesize reduction 20, result has 64.3 percent of original size [2021-01-06 11:24:25,102 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:25,102 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:36 [2021-01-06 11:24:25,366 INFO L348 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2021-01-06 11:24:25,367 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 75 [2021-01-06 11:24:25,371 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:25,406 INFO L625 ElimStorePlain]: treesize reduction 22, result has 70.7 percent of original size [2021-01-06 11:24:25,408 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:25,408 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:53 [2021-01-06 11:24:25,636 INFO L348 Elim1Store]: treesize reduction 10, result has 87.3 percent of original size [2021-01-06 11:24:25,637 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 131 [2021-01-06 11:24:25,641 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:25,664 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:25,669 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:25,670 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:89, output treesize:56 [2021-01-06 11:24:25,778 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:24:25,781 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:24:25,782 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:24:25,786 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:24:25,795 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:24:25,798 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 11:24:25,807 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 11:24:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:25,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:24:25,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-01-06 11:24:25,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942723337] [2021-01-06 11:24:25,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 11:24:25,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:25,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 11:24:25,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:24:25,851 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 25 states. [2021-01-06 11:24:26,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:24:26,958 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-01-06 11:24:26,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 11:24:26,970 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 21 [2021-01-06 11:24:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:24:26,971 INFO L225 Difference]: With dead ends: 46 [2021-01-06 11:24:26,971 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 11:24:26,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 11:24:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 11:24:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-01-06 11:24:26,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 11:24:26,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-01-06 11:24:26,980 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 21 [2021-01-06 11:24:26,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:24:26,980 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-01-06 11:24:26,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 11:24:26,981 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-01-06 11:24:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 11:24:26,981 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:26,981 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:27,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:27,197 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:27,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:27,198 INFO L82 PathProgramCache]: Analyzing trace with hash 692240447, now seen corresponding path program 1 times [2021-01-06 11:24:27,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:27,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827488031] [2021-01-06 11:24:27,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:27,216 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:24:27,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442178736] [2021-01-06 11:24:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:27,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 11:24:27,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:24:27,286 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 11:24:27,287 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:27,291 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:27,292 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:27,292 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2021-01-06 11:24:27,314 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 [2021-01-06 11:24:27,315 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:27,320 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:27,321 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:27,322 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2021-01-06 11:24:27,366 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:27,366 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2021-01-06 11:24:27,369 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:27,383 INFO L625 ElimStorePlain]: treesize reduction 24, result has 41.5 percent of original size [2021-01-06 11:24:27,385 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:27,386 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:13 [2021-01-06 11:24:27,418 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 [2021-01-06 11:24:27,420 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:27,421 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:27,422 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:27,422 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-01-06 11:24:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:27,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827488031] [2021-01-06 11:24:27,437 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:24:27,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442178736] [2021-01-06 11:24:27,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:24:27,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 11:24:27,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577113904] [2021-01-06 11:24:27,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:24:27,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:27,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:24:27,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:24:27,440 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 9 states. [2021-01-06 11:24:27,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:24:27,576 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-01-06 11:24:27,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 11:24:27,577 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2021-01-06 11:24:27,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:24:27,578 INFO L225 Difference]: With dead ends: 41 [2021-01-06 11:24:27,578 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 11:24:27,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:24:27,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 11:24:27,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-01-06 11:24:27,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 11:24:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-01-06 11:24:27,587 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2021-01-06 11:24:27,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:24:27,588 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-01-06 11:24:27,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:24:27,588 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-01-06 11:24:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 11:24:27,589 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:27,589 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:27,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 11:24:27,804 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:27,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:27,804 INFO L82 PathProgramCache]: Analyzing trace with hash -2132829117, now seen corresponding path program 5 times [2021-01-06 11:24:27,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:27,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812334646] [2021-01-06 11:24:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:27,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812334646] [2021-01-06 11:24:27,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124336976] [2021-01-06 11:24:27,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:28,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 11:24:28,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:24:28,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 11:24:28,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:24:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:28,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:24:28,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-01-06 11:24:28,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301945935] [2021-01-06 11:24:28,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 11:24:28,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:28,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 11:24:28,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:24:28,138 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 13 states. [2021-01-06 11:24:28,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:24:28,426 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-01-06 11:24:28,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 11:24:28,427 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2021-01-06 11:24:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:24:28,428 INFO L225 Difference]: With dead ends: 41 [2021-01-06 11:24:28,428 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 11:24:28,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:24:28,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 11:24:28,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-01-06 11:24:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 11:24:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-01-06 11:24:28,436 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2021-01-06 11:24:28,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:24:28,437 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-01-06 11:24:28,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 11:24:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-01-06 11:24:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 11:24:28,438 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:28,438 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:28,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:28,652 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:28,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:28,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1038837147, now seen corresponding path program 6 times [2021-01-06 11:24:28,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:28,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970217379] [2021-01-06 11:24:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:28,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970217379] [2021-01-06 11:24:28,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731420099] [2021-01-06 11:24:28,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:28,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 11:24:28,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:24:28,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 11:24:28,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:24:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:28,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:24:28,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-01-06 11:24:28,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241358244] [2021-01-06 11:24:28,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 11:24:28,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:28,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 11:24:28,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:24:28,943 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 13 states. [2021-01-06 11:24:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:24:29,086 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-01-06 11:24:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 11:24:29,088 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2021-01-06 11:24:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:24:29,090 INFO L225 Difference]: With dead ends: 45 [2021-01-06 11:24:29,090 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 11:24:29,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:24:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 11:24:29,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-01-06 11:24:29,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 11:24:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-01-06 11:24:29,096 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2021-01-06 11:24:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:24:29,097 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-01-06 11:24:29,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 11:24:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-01-06 11:24:29,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 11:24:29,098 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:29,098 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:29,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:29,308 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:29,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:29,309 INFO L82 PathProgramCache]: Analyzing trace with hash -2121994781, now seen corresponding path program 7 times [2021-01-06 11:24:29,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:29,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068349057] [2021-01-06 11:24:29,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:29,707 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-01-06 11:24:29,861 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-01-06 11:24:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:30,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068349057] [2021-01-06 11:24:30,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769852679] [2021-01-06 11:24:30,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:30,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 11:24:30,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:24:30,736 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 [2021-01-06 11:24:30,736 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:30,745 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:30,746 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:30,746 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 11:24:30,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:30,795 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 [2021-01-06 11:24:30,797 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:30,808 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:30,809 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:30,809 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2021-01-06 11:24:30,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:30,922 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:30,923 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2021-01-06 11:24:30,928 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:30,967 INFO L625 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-01-06 11:24:30,969 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:30,969 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-01-06 11:24:31,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:31,150 INFO L348 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2021-01-06 11:24:31,151 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2021-01-06 11:24:31,154 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:31,201 INFO L625 ElimStorePlain]: treesize reduction 20, result has 72.2 percent of original size [2021-01-06 11:24:31,203 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:31,203 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:52 [2021-01-06 11:24:31,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:31,567 INFO L348 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2021-01-06 11:24:31,568 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 101 [2021-01-06 11:24:31,571 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:31,593 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:31,596 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:31,596 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:55 [2021-01-06 11:24:31,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:31,847 INFO L348 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2021-01-06 11:24:31,848 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 101 [2021-01-06 11:24:31,851 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:31,906 INFO L625 ElimStorePlain]: treesize reduction 22, result has 74.7 percent of original size [2021-01-06 11:24:31,908 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:31,908 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:65 [2021-01-06 11:24:32,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:32,234 INFO L348 Elim1Store]: treesize reduction 32, result has 75.2 percent of original size [2021-01-06 11:24:32,235 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 173 [2021-01-06 11:24:32,240 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:32,324 INFO L625 ElimStorePlain]: treesize reduction 48, result has 61.3 percent of original size [2021-01-06 11:24:32,331 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:32,333 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:76 [2021-01-06 11:24:32,472 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:24:32,474 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:24:32,475 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:24:32,478 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:24:32,489 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:24:32,492 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 11:24:32,501 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2021-01-06 11:24:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:32,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:24:32,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-01-06 11:24:32,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352029197] [2021-01-06 11:24:32,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 11:24:32,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:32,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 11:24:32,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 11:24:32,560 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 35 states. [2021-01-06 11:24:34,186 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-01-06 11:24:34,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:24:34,866 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2021-01-06 11:24:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 11:24:34,867 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 26 [2021-01-06 11:24:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:24:34,867 INFO L225 Difference]: With dead ends: 57 [2021-01-06 11:24:34,868 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 11:24:34,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=365, Invalid=2605, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 11:24:34,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 11:24:34,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-01-06 11:24:34,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 11:24:34,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-01-06 11:24:34,882 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 26 [2021-01-06 11:24:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:24:34,882 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-01-06 11:24:34,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 11:24:34,883 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-01-06 11:24:34,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 11:24:34,884 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:34,884 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:35,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 11:24:35,094 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:35,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:35,094 INFO L82 PathProgramCache]: Analyzing trace with hash -2064736479, now seen corresponding path program 2 times [2021-01-06 11:24:35,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:35,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177582276] [2021-01-06 11:24:35,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:35,105 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:24:35,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596610971] [2021-01-06 11:24:35,106 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:35,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:24:35,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:24:35,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 11:24:35,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:24:35,210 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 [2021-01-06 11:24:35,210 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:35,215 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:35,216 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:35,216 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 11:24:35,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:35,260 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:35,261 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2021-01-06 11:24:35,262 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:35,278 INFO L625 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-01-06 11:24:35,279 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:35,279 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:18 [2021-01-06 11:24:35,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:35,313 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:35,314 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2021-01-06 11:24:35,317 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:35,331 INFO L625 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-01-06 11:24:35,333 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:35,333 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-01-06 11:24:35,378 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 19 treesize of output 7 [2021-01-06 11:24:35,379 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:35,381 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:35,382 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:35,382 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-01-06 11:24:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:35,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177582276] [2021-01-06 11:24:35,422 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:24:35,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596610971] [2021-01-06 11:24:35,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:24:35,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 11:24:35,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030009603] [2021-01-06 11:24:35,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 11:24:35,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:35,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 11:24:35,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:24:35,425 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 11 states. [2021-01-06 11:24:35,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:24:35,654 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-01-06 11:24:35,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:24:35,656 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2021-01-06 11:24:35,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:24:35,657 INFO L225 Difference]: With dead ends: 49 [2021-01-06 11:24:35,657 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 11:24:35,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:24:35,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 11:24:35,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-01-06 11:24:35,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 11:24:35,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-01-06 11:24:35,666 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 26 [2021-01-06 11:24:35,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:24:35,666 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-01-06 11:24:35,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 11:24:35,666 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-01-06 11:24:35,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 11:24:35,667 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:35,668 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:35,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:35,882 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:35,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:35,883 INFO L82 PathProgramCache]: Analyzing trace with hash 640571873, now seen corresponding path program 8 times [2021-01-06 11:24:35,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:35,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120799359] [2021-01-06 11:24:35,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:35,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120799359] [2021-01-06 11:24:35,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733951792] [2021-01-06 11:24:35,995 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:36,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:24:36,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:24:36,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 11:24:36,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:24:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:36,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:24:36,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-01-06 11:24:36,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760675277] [2021-01-06 11:24:36,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 11:24:36,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:36,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 11:24:36,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:24:36,201 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 16 states. [2021-01-06 11:24:36,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:24:36,576 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-01-06 11:24:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 11:24:36,576 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2021-01-06 11:24:36,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:24:36,577 INFO L225 Difference]: With dead ends: 49 [2021-01-06 11:24:36,577 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 11:24:36,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-01-06 11:24:36,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 11:24:36,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2021-01-06 11:24:36,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 11:24:36,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-01-06 11:24:36,586 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2021-01-06 11:24:36,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:24:36,586 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-01-06 11:24:36,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 11:24:36,586 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-01-06 11:24:36,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 11:24:36,587 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:36,587 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:36,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:36,802 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:36,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:36,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1478838205, now seen corresponding path program 9 times [2021-01-06 11:24:36,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:36,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460261693] [2021-01-06 11:24:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:36,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460261693] [2021-01-06 11:24:36,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680960028] [2021-01-06 11:24:36,927 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 [2021-01-06 11:24:37,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 11:24:37,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:24:37,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 11:24:37,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:24:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:37,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:24:37,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-01-06 11:24:37,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451017969] [2021-01-06 11:24:37,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 11:24:37,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:37,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 11:24:37,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:24:37,121 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 16 states. [2021-01-06 11:24:37,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:24:37,319 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-01-06 11:24:37,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 11:24:37,319 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2021-01-06 11:24:37,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:24:37,320 INFO L225 Difference]: With dead ends: 53 [2021-01-06 11:24:37,320 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 11:24:37,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:24:37,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 11:24:37,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-01-06 11:24:37,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 11:24:37,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-01-06 11:24:37,327 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2021-01-06 11:24:37,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:24:37,328 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-01-06 11:24:37,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 11:24:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-01-06 11:24:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 11:24:37,329 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:37,329 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:37,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 11:24:37,544 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:37,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:37,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2018974843, now seen corresponding path program 10 times [2021-01-06 11:24:37,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:37,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418369003] [2021-01-06 11:24:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:38,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418369003] [2021-01-06 11:24:38,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923237002] [2021-01-06 11:24:38,386 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:38,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:24:38,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:24:38,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 11:24:38,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:24:38,462 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 11:24:38,463 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:38,471 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:38,475 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 11 treesize of output 7 [2021-01-06 11:24:38,476 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:38,484 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:38,485 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:38,485 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2021-01-06 11:24:38,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:38,502 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 [2021-01-06 11:24:38,503 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:38,515 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:38,516 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:38,516 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:26 [2021-01-06 11:24:38,624 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:38,625 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2021-01-06 11:24:38,630 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:38,663 INFO L625 ElimStorePlain]: treesize reduction 20, result has 62.3 percent of original size [2021-01-06 11:24:38,664 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:38,665 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-01-06 11:24:38,838 INFO L348 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2021-01-06 11:24:38,839 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2021-01-06 11:24:38,842 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:38,885 INFO L625 ElimStorePlain]: treesize reduction 20, result has 69.2 percent of original size [2021-01-06 11:24:38,886 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:38,886 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-01-06 11:24:39,148 INFO L348 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2021-01-06 11:24:39,149 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 140 [2021-01-06 11:24:39,153 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:39,224 INFO L625 ElimStorePlain]: treesize reduction 64, result has 45.8 percent of original size [2021-01-06 11:24:39,225 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:39,225 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:54 [2021-01-06 11:24:39,650 INFO L348 Elim1Store]: treesize reduction 66, result has 45.5 percent of original size [2021-01-06 11:24:39,650 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 127 [2021-01-06 11:24:39,654 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:39,709 INFO L625 ElimStorePlain]: treesize reduction 20, result has 77.0 percent of original size [2021-01-06 11:24:39,710 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:39,711 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:88, output treesize:67 [2021-01-06 11:24:40,006 INFO L348 Elim1Store]: treesize reduction 66, result has 45.5 percent of original size [2021-01-06 11:24:40,006 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 127 [2021-01-06 11:24:40,010 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:40,068 INFO L625 ElimStorePlain]: treesize reduction 46, result has 61.3 percent of original size [2021-01-06 11:24:40,070 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:40,070 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:88, output treesize:73 [2021-01-06 11:24:40,482 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-01-06 11:24:40,483 INFO L348 Elim1Store]: treesize reduction 66, result has 65.4 percent of original size [2021-01-06 11:24:40,483 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 213 [2021-01-06 11:24:40,491 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:40,562 INFO L625 ElimStorePlain]: treesize reduction 70, result has 54.5 percent of original size [2021-01-06 11:24:40,568 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:40,569 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:109, output treesize:84 [2021-01-06 11:24:41,198 WARN L197 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-01-06 11:24:41,477 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-01-06 11:24:41,665 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-01-06 11:24:41,666 INFO L348 Elim1Store]: treesize reduction 66, result has 65.4 percent of original size [2021-01-06 11:24:41,666 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 213 [2021-01-06 11:24:41,676 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:41,748 INFO L625 ElimStorePlain]: treesize reduction 28, result has 78.0 percent of original size [2021-01-06 11:24:41,759 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:41,759 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:109, output treesize:99 [2021-01-06 11:24:41,921 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:24:41,923 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:24:41,927 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:24:41,928 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:24:41,941 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:24:41,945 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 11:24:41,956 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2021-01-06 11:24:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:42,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:24:42,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-01-06 11:24:42,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755821185] [2021-01-06 11:24:42,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 11:24:42,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:42,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 11:24:42,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1434, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 11:24:42,028 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 40 states. [2021-01-06 11:24:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:24:43,637 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2021-01-06 11:24:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 11:24:43,638 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 31 [2021-01-06 11:24:43,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:24:43,639 INFO L225 Difference]: With dead ends: 68 [2021-01-06 11:24:43,639 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 11:24:43,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=191, Invalid=2065, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 11:24:43,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 11:24:43,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-01-06 11:24:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 11:24:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-01-06 11:24:43,651 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 31 [2021-01-06 11:24:43,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:24:43,651 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-01-06 11:24:43,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 11:24:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-01-06 11:24:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 11:24:43,652 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:43,652 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:43,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 11:24:43,868 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:43,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:43,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1961716541, now seen corresponding path program 3 times [2021-01-06 11:24:43,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:43,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492463537] [2021-01-06 11:24:43,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:43,883 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:24:43,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907845667] [2021-01-06 11:24:43,883 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:43,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 11:24:43,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:24:43,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 11:24:43,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:24:43,991 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:24:43,992 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:44,002 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:44,003 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:44,003 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2021-01-06 11:24:44,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:44,089 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:44,089 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2021-01-06 11:24:44,092 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:44,115 INFO L625 ElimStorePlain]: treesize reduction 28, result has 47.2 percent of original size [2021-01-06 11:24:44,117 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:44,117 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:25 [2021-01-06 11:24:44,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:44,149 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:44,151 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2021-01-06 11:24:44,153 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:44,174 INFO L625 ElimStorePlain]: treesize reduction 20, result has 55.6 percent of original size [2021-01-06 11:24:44,176 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:44,176 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:25 [2021-01-06 11:24:44,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:44,204 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:44,205 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2021-01-06 11:24:44,206 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:44,227 INFO L625 ElimStorePlain]: treesize reduction 28, result has 47.2 percent of original size [2021-01-06 11:24:44,229 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:44,230 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:20 [2021-01-06 11:24:44,260 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:44,260 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-01-06 11:24:44,262 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 11:24:44,275 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:44,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:24:44,278 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:44,279 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:18 [2021-01-06 11:24:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 11:24:44,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492463537] [2021-01-06 11:24:44,344 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:24:44,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907845667] [2021-01-06 11:24:44,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:24:44,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 11:24:44,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767518443] [2021-01-06 11:24:44,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:24:44,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:44,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:24:44,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:24:44,346 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 10 states. [2021-01-06 11:24:44,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:24:44,638 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-01-06 11:24:44,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:24:44,638 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2021-01-06 11:24:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:24:44,639 INFO L225 Difference]: With dead ends: 54 [2021-01-06 11:24:44,639 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 11:24:44,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:24:44,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 11:24:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-01-06 11:24:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 11:24:44,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-01-06 11:24:44,652 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 31 [2021-01-06 11:24:44,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:24:44,652 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-01-06 11:24:44,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:24:44,653 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-01-06 11:24:44,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 11:24:44,654 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:44,654 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:44,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 11:24:44,870 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:44,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:44,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1399241145, now seen corresponding path program 11 times [2021-01-06 11:24:44,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:44,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320882688] [2021-01-06 11:24:44,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:44,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320882688] [2021-01-06 11:24:44,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896633312] [2021-01-06 11:24:44,998 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:45,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 11:24:45,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:24:45,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 11:24:45,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:24:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:45,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:24:45,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-01-06 11:24:45,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815118956] [2021-01-06 11:24:45,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 11:24:45,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:45,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 11:24:45,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:24:45,267 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 19 states. [2021-01-06 11:24:45,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:24:45,763 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2021-01-06 11:24:45,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 11:24:45,764 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2021-01-06 11:24:45,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:24:45,765 INFO L225 Difference]: With dead ends: 62 [2021-01-06 11:24:45,765 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 11:24:45,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2021-01-06 11:24:45,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 11:24:45,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2021-01-06 11:24:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 11:24:45,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-01-06 11:24:45,775 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 33 [2021-01-06 11:24:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:24:45,776 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-01-06 11:24:45,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 11:24:45,776 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-01-06 11:24:45,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 11:24:45,777 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:45,777 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:45,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:45,989 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:45,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:45,990 INFO L82 PathProgramCache]: Analyzing trace with hash 981485409, now seen corresponding path program 12 times [2021-01-06 11:24:45,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:45,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487510164] [2021-01-06 11:24:45,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:46,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487510164] [2021-01-06 11:24:46,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308401593] [2021-01-06 11:24:46,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:46,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 11:24:46,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:24:46,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 11:24:46,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:24:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:46,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:24:46,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-01-06 11:24:46,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383701817] [2021-01-06 11:24:46,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 11:24:46,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:46,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 11:24:46,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:24:46,363 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 19 states. [2021-01-06 11:24:46,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:24:46,636 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-01-06 11:24:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 11:24:46,637 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2021-01-06 11:24:46,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:24:46,638 INFO L225 Difference]: With dead ends: 66 [2021-01-06 11:24:46,638 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 11:24:46,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-01-06 11:24:46,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 11:24:46,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2021-01-06 11:24:46,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 11:24:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-01-06 11:24:46,647 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 34 [2021-01-06 11:24:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:24:46,647 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-01-06 11:24:46,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 11:24:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-01-06 11:24:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 11:24:46,648 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:24:46,648 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:24:46,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 11:24:46,862 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:24:46,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:24:46,862 INFO L82 PathProgramCache]: Analyzing trace with hash -596322977, now seen corresponding path program 13 times [2021-01-06 11:24:46,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:24:46,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083360042] [2021-01-06 11:24:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:24:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:47,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083360042] [2021-01-06 11:24:47,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709478361] [2021-01-06 11:24:47,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:24:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:24:48,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 60 conjunts are in the unsatisfiable core [2021-01-06 11:24:48,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:24:48,158 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 [2021-01-06 11:24:48,159 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:48,169 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:48,170 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:48,170 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 11:24:48,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:48,237 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 [2021-01-06 11:24:48,240 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:48,255 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:48,256 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:48,257 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2021-01-06 11:24:48,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:48,413 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:48,413 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2021-01-06 11:24:48,416 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:48,456 INFO L625 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-01-06 11:24:48,457 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:48,458 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-01-06 11:24:48,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:48,667 INFO L348 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2021-01-06 11:24:48,667 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2021-01-06 11:24:48,669 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:48,719 INFO L625 ElimStorePlain]: treesize reduction 20, result has 71.0 percent of original size [2021-01-06 11:24:48,720 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:48,720 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:49 [2021-01-06 11:24:48,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:49,017 INFO L348 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2021-01-06 11:24:49,018 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 140 [2021-01-06 11:24:49,021 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:49,098 INFO L625 ElimStorePlain]: treesize reduction 64, result has 46.2 percent of original size [2021-01-06 11:24:49,099 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:49,100 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:55 [2021-01-06 11:24:49,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:49,459 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2021-01-06 11:24:49,460 INFO L348 Elim1Store]: treesize reduction 114, result has 51.7 percent of original size [2021-01-06 11:24:49,461 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 155 [2021-01-06 11:24:49,467 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:49,575 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-01-06 11:24:49,576 INFO L625 ElimStorePlain]: treesize reduction 64, result has 52.2 percent of original size [2021-01-06 11:24:49,577 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:24:49,578 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:70 [2021-01-06 11:24:50,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:50,219 INFO L348 Elim1Store]: treesize reduction 112, result has 38.1 percent of original size [2021-01-06 11:24:50,220 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 153 [2021-01-06 11:24:50,224 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:50,305 INFO L625 ElimStorePlain]: treesize reduction 70, result has 53.6 percent of original size [2021-01-06 11:24:50,307 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:50,307 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:98, output treesize:81 [2021-01-06 11:24:50,856 WARN L197 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-01-06 11:24:51,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:51,262 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2021-01-06 11:24:51,264 INFO L348 Elim1Store]: treesize reduction 112, result has 57.7 percent of original size [2021-01-06 11:24:51,264 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 251 [2021-01-06 11:24:51,271 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:51,369 INFO L625 ElimStorePlain]: treesize reduction 72, result has 56.6 percent of original size [2021-01-06 11:24:51,372 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:51,372 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:117, output treesize:94 [2021-01-06 11:24:52,397 WARN L197 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-01-06 11:24:52,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:52,865 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2021-01-06 11:24:52,865 INFO L348 Elim1Store]: treesize reduction 112, result has 57.7 percent of original size [2021-01-06 11:24:52,866 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 108 treesize of output 253 [2021-01-06 11:24:52,873 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:52,970 INFO L625 ElimStorePlain]: treesize reduction 48, result has 66.2 percent of original size [2021-01-06 11:24:52,971 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:52,972 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:119, output treesize:94 [2021-01-06 11:24:53,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:53,623 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2021-01-06 11:24:53,624 INFO L348 Elim1Store]: treesize reduction 112, result has 57.7 percent of original size [2021-01-06 11:24:53,625 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 108 treesize of output 253 [2021-01-06 11:24:53,631 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:53,675 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:24:53,676 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:53,677 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:119, output treesize:84 [2021-01-06 11:24:54,403 WARN L197 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-01-06 11:24:54,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:24:54,655 INFO L348 Elim1Store]: treesize reduction 112, result has 38.1 percent of original size [2021-01-06 11:24:54,656 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 153 [2021-01-06 11:24:54,661 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:24:54,747 INFO L625 ElimStorePlain]: treesize reduction 72, result has 53.5 percent of original size [2021-01-06 11:24:54,750 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:24:54,750 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:98, output treesize:83 [2021-01-06 11:24:54,940 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:24:54,942 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:24:54,943 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:24:54,945 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:24:54,951 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:24:54,953 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 11:24:54,959 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2021-01-06 11:24:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:24:55,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:24:55,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2021-01-06 11:24:55,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135145488] [2021-01-06 11:24:55,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 11:24:55,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:24:55,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 11:24:55,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2366, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 11:24:55,063 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 51 states. [2021-01-06 11:24:57,291 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2021-01-06 11:24:57,483 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-01-06 11:24:57,728 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-01-06 11:24:58,050 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-01-06 11:24:58,273 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-01-06 11:24:59,145 WARN L197 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-01-06 11:24:59,962 WARN L197 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-01-06 11:25:00,186 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-01-06 11:25:00,428 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-01-06 11:25:00,858 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-01-06 11:25:01,084 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-01-06 11:25:01,635 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-01-06 11:25:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:02,251 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2021-01-06 11:25:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 11:25:02,252 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 36 [2021-01-06 11:25:02,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:02,253 INFO L225 Difference]: With dead ends: 79 [2021-01-06 11:25:02,253 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 11:25:02,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1807 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=477, Invalid=6003, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 11:25:02,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 11:25:02,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-01-06 11:25:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 11:25:02,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-01-06 11:25:02,268 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 36 [2021-01-06 11:25:02,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:02,268 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-01-06 11:25:02,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 11:25:02,268 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-01-06 11:25:02,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 11:25:02,269 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:02,269 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:02,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 11:25:02,485 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:02,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:02,485 INFO L82 PathProgramCache]: Analyzing trace with hash 83735393, now seen corresponding path program 4 times [2021-01-06 11:25:02,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:02,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801673379] [2021-01-06 11:25:02,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:02,495 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:25:02,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472066750] [2021-01-06 11:25:02,496 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:02,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:25:02,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:02,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 11:25:02,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:02,564 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 11:25:02,566 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:02,570 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:02,571 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:02,571 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2021-01-06 11:25:02,636 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 15 treesize of output 11 [2021-01-06 11:25:02,637 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:02,645 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:02,646 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:02,646 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 11:25:02,709 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:02,709 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 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:25:02,712 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:02,745 INFO L625 ElimStorePlain]: treesize reduction 22, result has 56.0 percent of original size [2021-01-06 11:25:02,746 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:02,746 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2021-01-06 11:25:03,450 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:03,451 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2021-01-06 11:25:03,454 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:03,483 INFO L625 ElimStorePlain]: treesize reduction 46, result has 40.3 percent of original size [2021-01-06 11:25:03,485 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:03,485 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2021-01-06 11:25:03,559 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:03,559 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2021-01-06 11:25:03,563 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:03,595 INFO L625 ElimStorePlain]: treesize reduction 76, result has 29.0 percent of original size [2021-01-06 11:25:03,596 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:03,596 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2021-01-06 11:25:03,669 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:03,669 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2021-01-06 11:25:03,672 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:03,706 INFO L625 ElimStorePlain]: treesize reduction 38, result has 44.9 percent of original size [2021-01-06 11:25:03,708 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:03,708 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:27 [2021-01-06 11:25:04,157 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:04,158 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-01-06 11:25:04,159 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:04,165 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:04,167 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:04,167 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:3 [2021-01-06 11:25:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 11:25:04,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801673379] [2021-01-06 11:25:04,202 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:25:04,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472066750] [2021-01-06 11:25:04,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:25:04,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 11:25:04,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532859748] [2021-01-06 11:25:04,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 11:25:04,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:04,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 11:25:04,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=174, Unknown=1, NotChecked=0, Total=210 [2021-01-06 11:25:04,204 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 15 states. [2021-01-06 11:25:05,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:05,277 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-01-06 11:25:05,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 11:25:05,278 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2021-01-06 11:25:05,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:05,278 INFO L225 Difference]: With dead ends: 64 [2021-01-06 11:25:05,278 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 11:25:05,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=53, Invalid=252, Unknown=1, NotChecked=0, Total=306 [2021-01-06 11:25:05,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 11:25:05,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-01-06 11:25:05,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 11:25:05,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-01-06 11:25:05,291 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 36 [2021-01-06 11:25:05,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:05,292 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-01-06 11:25:05,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 11:25:05,292 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-01-06 11:25:05,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 11:25:05,292 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:05,292 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:05,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:05,507 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:05,508 INFO L82 PathProgramCache]: Analyzing trace with hash -746726435, now seen corresponding path program 14 times [2021-01-06 11:25:05,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:05,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646534472] [2021-01-06 11:25:05,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:05,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646534472] [2021-01-06 11:25:05,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92646431] [2021-01-06 11:25:05,706 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:05,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:25:05,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:05,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 11:25:05,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:05,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:05,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-01-06 11:25:05,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231841822] [2021-01-06 11:25:05,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 11:25:05,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:05,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 11:25:05,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-01-06 11:25:05,978 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 22 states. [2021-01-06 11:25:06,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:06,746 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2021-01-06 11:25:06,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 11:25:06,748 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2021-01-06 11:25:06,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:06,749 INFO L225 Difference]: With dead ends: 70 [2021-01-06 11:25:06,749 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 11:25:06,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 11:25:06,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 11:25:06,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 45. [2021-01-06 11:25:06,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 11:25:06,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-01-06 11:25:06,759 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 38 [2021-01-06 11:25:06,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:06,760 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-01-06 11:25:06,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 11:25:06,760 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-01-06 11:25:06,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 11:25:06,760 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:06,761 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:06,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:06,968 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:06,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:06,969 INFO L82 PathProgramCache]: Analyzing trace with hash 465948487, now seen corresponding path program 15 times [2021-01-06 11:25:06,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:06,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725828310] [2021-01-06 11:25:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:07,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725828310] [2021-01-06 11:25:07,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905642515] [2021-01-06 11:25:07,146 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:07,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 11:25:07,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:07,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 11:25:07,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:07,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:07,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-01-06 11:25:07,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316656740] [2021-01-06 11:25:07,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 11:25:07,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:07,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 11:25:07,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-01-06 11:25:07,493 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 22 states. [2021-01-06 11:25:07,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:07,820 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2021-01-06 11:25:07,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 11:25:07,821 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 39 [2021-01-06 11:25:07,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:07,821 INFO L225 Difference]: With dead ends: 74 [2021-01-06 11:25:07,821 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 11:25:07,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-01-06 11:25:07,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 11:25:07,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-01-06 11:25:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 11:25:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-01-06 11:25:07,832 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2021-01-06 11:25:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:07,832 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-01-06 11:25:07,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 11:25:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-01-06 11:25:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 11:25:07,833 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:07,833 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:08,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:08,049 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:08,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:08,050 INFO L82 PathProgramCache]: Analyzing trace with hash -552579063, now seen corresponding path program 16 times [2021-01-06 11:25:08,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:08,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804371075] [2021-01-06 11:25:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:09,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804371075] [2021-01-06 11:25:09,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644193315] [2021-01-06 11:25:09,659 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:09,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:25:09,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:09,714 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 11:25:09,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:09,727 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 11:25:09,729 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:09,737 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:09,746 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 11 treesize of output 7 [2021-01-06 11:25:09,748 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:09,755 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:09,756 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:09,756 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2021-01-06 11:25:09,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:09,767 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 [2021-01-06 11:25:09,769 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:09,778 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:09,779 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:09,779 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:26 [2021-01-06 11:25:09,948 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:09,949 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2021-01-06 11:25:09,953 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:09,994 INFO L625 ElimStorePlain]: treesize reduction 20, result has 62.3 percent of original size [2021-01-06 11:25:09,995 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:09,996 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-01-06 11:25:10,240 INFO L348 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2021-01-06 11:25:10,241 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 98 [2021-01-06 11:25:10,244 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:10,300 INFO L625 ElimStorePlain]: treesize reduction 42, result has 50.0 percent of original size [2021-01-06 11:25:10,301 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:10,301 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2021-01-06 11:25:10,630 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-01-06 11:25:10,631 INFO L348 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2021-01-06 11:25:10,631 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 140 [2021-01-06 11:25:10,635 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:10,719 INFO L625 ElimStorePlain]: treesize reduction 64, result has 44.3 percent of original size [2021-01-06 11:25:10,720 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:10,720 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:51 [2021-01-06 11:25:11,146 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2021-01-06 11:25:11,147 INFO L348 Elim1Store]: treesize reduction 66, result has 69.3 percent of original size [2021-01-06 11:25:11,147 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 182 [2021-01-06 11:25:11,152 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:11,253 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-01-06 11:25:11,254 INFO L625 ElimStorePlain]: treesize reduction 86, result has 41.1 percent of original size [2021-01-06 11:25:11,255 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:11,255 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:60 [2021-01-06 11:25:11,732 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 51 [2021-01-06 11:25:11,733 INFO L348 Elim1Store]: treesize reduction 163, result has 49.7 percent of original size [2021-01-06 11:25:11,734 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 197 [2021-01-06 11:25:11,741 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:11,848 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-01-06 11:25:11,849 INFO L625 ElimStorePlain]: treesize reduction 86, result has 46.6 percent of original size [2021-01-06 11:25:11,851 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:11,851 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:79, output treesize:75 [2021-01-06 11:25:12,620 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2021-01-06 11:25:12,621 INFO L348 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2021-01-06 11:25:12,621 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2021-01-06 11:25:12,626 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:12,675 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:12,676 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:12,676 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:106, output treesize:81 [2021-01-06 11:25:13,212 INFO L348 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2021-01-06 11:25:13,213 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2021-01-06 11:25:13,220 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:13,323 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-01-06 11:25:13,324 INFO L625 ElimStorePlain]: treesize reduction 94, result has 49.2 percent of original size [2021-01-06 11:25:13,329 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:13,330 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:106, output treesize:91 [2021-01-06 11:25:14,082 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 78 [2021-01-06 11:25:14,083 INFO L348 Elim1Store]: treesize reduction 170, result has 51.6 percent of original size [2021-01-06 11:25:14,084 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 117 treesize of output 293 [2021-01-06 11:25:14,089 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:14,143 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:14,144 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:14,145 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:127, output treesize:92 [2021-01-06 11:25:14,732 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2021-01-06 11:25:14,733 INFO L348 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2021-01-06 11:25:14,733 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2021-01-06 11:25:14,739 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:14,791 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:14,793 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:14,793 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:106, output treesize:81 [2021-01-06 11:25:15,885 WARN L197 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-01-06 11:25:16,287 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2021-01-06 11:25:16,288 INFO L348 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2021-01-06 11:25:16,288 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2021-01-06 11:25:16,294 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:16,396 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-01-06 11:25:16,397 INFO L625 ElimStorePlain]: treesize reduction 46, result has 66.4 percent of original size [2021-01-06 11:25:16,399 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:16,399 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:106, output treesize:91 [2021-01-06 11:25:17,280 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 78 [2021-01-06 11:25:17,282 INFO L348 Elim1Store]: treesize reduction 170, result has 51.6 percent of original size [2021-01-06 11:25:17,282 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 117 treesize of output 293 [2021-01-06 11:25:17,292 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:17,436 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2021-01-06 11:25:17,436 INFO L625 ElimStorePlain]: treesize reduction 189, result has 38.2 percent of original size [2021-01-06 11:25:17,441 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:17,442 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:127, output treesize:117 [2021-01-06 11:25:17,689 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:17,692 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:17,694 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:17,696 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:25:17,705 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:17,709 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2021-01-06 11:25:17,718 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 13 disjuncts [2021-01-06 11:25:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:17,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:17,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 56 [2021-01-06 11:25:17,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281735483] [2021-01-06 11:25:17,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 11:25:17,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:17,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 11:25:17,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2900, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 11:25:17,860 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 56 states. [2021-01-06 11:25:19,369 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-01-06 11:25:19,564 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-01-06 11:25:20,211 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-01-06 11:25:20,653 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-01-06 11:25:21,138 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-01-06 11:25:21,654 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-01-06 11:25:22,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:22,715 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2021-01-06 11:25:22,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 11:25:22,717 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 41 [2021-01-06 11:25:22,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:22,718 INFO L225 Difference]: With dead ends: 90 [2021-01-06 11:25:22,718 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 11:25:22,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=261, Invalid=4029, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 11:25:22,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 11:25:22,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2021-01-06 11:25:22,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 11:25:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-01-06 11:25:22,734 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 41 [2021-01-06 11:25:22,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:22,734 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-01-06 11:25:22,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 11:25:22,735 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-01-06 11:25:22,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 11:25:22,735 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:22,735 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:22,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 11:25:22,949 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:22,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:22,950 INFO L82 PathProgramCache]: Analyzing trace with hash 127479307, now seen corresponding path program 5 times [2021-01-06 11:25:22,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:22,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172302685] [2021-01-06 11:25:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:22,960 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:25:22,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58947941] [2021-01-06 11:25:22,961 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:23,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 11:25:23,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:23,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 11:25:23,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:23,119 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 11:25:23,121 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:23,127 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:23,128 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:23,128 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2021-01-06 11:25:23,199 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 15 treesize of output 11 [2021-01-06 11:25:23,200 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:23,210 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:23,212 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:23,212 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 11:25:23,279 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:23,279 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 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:25:23,281 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:23,318 INFO L625 ElimStorePlain]: treesize reduction 22, result has 56.0 percent of original size [2021-01-06 11:25:23,320 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:23,321 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2021-01-06 11:25:23,445 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:23,445 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2021-01-06 11:25:23,447 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:23,485 INFO L625 ElimStorePlain]: treesize reduction 44, result has 41.3 percent of original size [2021-01-06 11:25:23,486 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:23,487 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2021-01-06 11:25:23,631 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:23,631 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2021-01-06 11:25:23,634 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:23,670 INFO L625 ElimStorePlain]: treesize reduction 38, result has 44.9 percent of original size [2021-01-06 11:25:23,672 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:23,672 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2021-01-06 11:25:23,777 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:23,778 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2021-01-06 11:25:23,780 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:23,821 INFO L625 ElimStorePlain]: treesize reduction 38, result has 44.9 percent of original size [2021-01-06 11:25:23,822 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:23,823 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2021-01-06 11:25:23,943 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:23,944 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2021-01-06 11:25:23,946 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:23,985 INFO L625 ElimStorePlain]: treesize reduction 46, result has 40.3 percent of original size [2021-01-06 11:25:23,987 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:23,987 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:27 [2021-01-06 11:25:24,377 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-01-06 11:25:24,438 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:24,439 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-01-06 11:25:24,440 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:24,445 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:24,446 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:24,447 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:3 [2021-01-06 11:25:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 11:25:24,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172302685] [2021-01-06 11:25:24,491 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:25:24,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58947941] [2021-01-06 11:25:24,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:25:24,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-01-06 11:25:24,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146256644] [2021-01-06 11:25:24,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 11:25:24,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:24,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 11:25:24,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:25:24,493 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 17 states. [2021-01-06 11:25:25,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:25,278 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-01-06 11:25:25,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 11:25:25,280 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2021-01-06 11:25:25,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:25,280 INFO L225 Difference]: With dead ends: 72 [2021-01-06 11:25:25,281 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 11:25:25,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:25:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 11:25:25,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-01-06 11:25:25,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 11:25:25,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-01-06 11:25:25,292 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 41 [2021-01-06 11:25:25,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:25,293 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-01-06 11:25:25,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 11:25:25,293 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-01-06 11:25:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 11:25:25,293 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:25,293 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:25,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 11:25:25,494 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:25,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:25,495 INFO L82 PathProgramCache]: Analyzing trace with hash -105011125, now seen corresponding path program 17 times [2021-01-06 11:25:25,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:25,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940188938] [2021-01-06 11:25:25,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:25,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940188938] [2021-01-06 11:25:25,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267035145] [2021-01-06 11:25:25,744 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:25,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 11:25:25,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:25,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 11:25:25,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:26,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:26,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-01-06 11:25:26,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842714235] [2021-01-06 11:25:26,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 11:25:26,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:26,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 11:25:26,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:25:26,160 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 25 states. [2021-01-06 11:25:26,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:26,941 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-01-06 11:25:26,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 11:25:26,943 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 43 [2021-01-06 11:25:26,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:26,944 INFO L225 Difference]: With dead ends: 78 [2021-01-06 11:25:26,944 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 11:25:26,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=342, Invalid=1140, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 11:25:26,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 11:25:26,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2021-01-06 11:25:26,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 11:25:26,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-01-06 11:25:26,957 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 43 [2021-01-06 11:25:26,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:26,957 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-01-06 11:25:26,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 11:25:26,957 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-01-06 11:25:26,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 11:25:26,958 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:26,958 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:27,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:27,159 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:27,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:27,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2029167523, now seen corresponding path program 18 times [2021-01-06 11:25:27,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:27,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862400008] [2021-01-06 11:25:27,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:27,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862400008] [2021-01-06 11:25:27,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267027105] [2021-01-06 11:25:27,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:27,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 11:25:27,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:27,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 11:25:27,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:27,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:27,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-01-06 11:25:27,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048776704] [2021-01-06 11:25:27,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 11:25:27,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:27,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 11:25:27,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:25:27,888 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 25 states. [2021-01-06 11:25:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:28,342 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2021-01-06 11:25:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 11:25:28,344 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2021-01-06 11:25:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:28,344 INFO L225 Difference]: With dead ends: 82 [2021-01-06 11:25:28,344 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 11:25:28,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2021-01-06 11:25:28,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 11:25:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-01-06 11:25:28,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 11:25:28,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-01-06 11:25:28,356 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 44 [2021-01-06 11:25:28,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:28,356 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-01-06 11:25:28,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 11:25:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-01-06 11:25:28,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 11:25:28,357 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:28,357 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:28,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 11:25:28,571 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:28,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:28,571 INFO L82 PathProgramCache]: Analyzing trace with hash -111213349, now seen corresponding path program 19 times [2021-01-06 11:25:28,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:28,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514008275] [2021-01-06 11:25:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:30,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514008275] [2021-01-06 11:25:30,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014067071] [2021-01-06 11:25:30,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:25:30,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 76 conjunts are in the unsatisfiable core [2021-01-06 11:25:30,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:30,999 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 [2021-01-06 11:25:31,000 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:31,009 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:31,010 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:31,010 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 11:25:31,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:31,104 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 [2021-01-06 11:25:31,105 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:31,124 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:31,125 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:31,126 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2021-01-06 11:25:31,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:31,372 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:31,373 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2021-01-06 11:25:31,375 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:31,429 INFO L625 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-01-06 11:25:31,429 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:31,430 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-01-06 11:25:31,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:31,776 INFO L348 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2021-01-06 11:25:31,776 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 98 [2021-01-06 11:25:31,779 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:31,859 INFO L625 ElimStorePlain]: treesize reduction 42, result has 52.3 percent of original size [2021-01-06 11:25:31,859 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:31,860 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2021-01-06 11:25:32,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:32,284 INFO L348 Elim1Store]: treesize reduction 77, result has 51.9 percent of original size [2021-01-06 11:25:32,284 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 113 [2021-01-06 11:25:32,287 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:32,372 INFO L625 ElimStorePlain]: treesize reduction 42, result has 58.0 percent of original size [2021-01-06 11:25:32,373 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:32,373 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:58 [2021-01-06 11:25:32,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:32,889 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2021-01-06 11:25:32,890 INFO L348 Elim1Store]: treesize reduction 66, result has 69.3 percent of original size [2021-01-06 11:25:32,890 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 182 [2021-01-06 11:25:32,894 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:33,017 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-01-06 11:25:33,018 INFO L625 ElimStorePlain]: treesize reduction 86, result has 42.7 percent of original size [2021-01-06 11:25:33,019 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:33,019 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:64 [2021-01-06 11:25:33,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:33,651 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 51 [2021-01-06 11:25:33,652 INFO L348 Elim1Store]: treesize reduction 163, result has 49.7 percent of original size [2021-01-06 11:25:33,652 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 197 [2021-01-06 11:25:33,659 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:33,808 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-01-06 11:25:33,808 INFO L625 ElimStorePlain]: treesize reduction 86, result has 46.9 percent of original size [2021-01-06 11:25:33,810 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:33,810 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:76 [2021-01-06 11:25:34,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:34,569 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 66 [2021-01-06 11:25:34,570 INFO L348 Elim1Store]: treesize reduction 170, result has 57.2 percent of original size [2021-01-06 11:25:34,570 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 266 [2021-01-06 11:25:34,576 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:34,758 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-01-06 11:25:34,759 INFO L625 ElimStorePlain]: treesize reduction 130, result has 39.5 percent of original size [2021-01-06 11:25:34,760 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:34,760 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:85 [2021-01-06 11:25:35,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:35,927 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 53 [2021-01-06 11:25:35,928 INFO L348 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2021-01-06 11:25:35,928 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 105 treesize of output 205 [2021-01-06 11:25:35,934 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:36,061 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-01-06 11:25:36,061 INFO L625 ElimStorePlain]: treesize reduction 72, result has 57.9 percent of original size [2021-01-06 11:25:36,063 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:36,063 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:116, output treesize:99 [2021-01-06 11:25:36,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:37,032 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 89 [2021-01-06 11:25:37,033 INFO L348 Elim1Store]: treesize reduction 240, result has 46.5 percent of original size [2021-01-06 11:25:37,033 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 124 treesize of output 331 [2021-01-06 11:25:37,041 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:37,169 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-01-06 11:25:37,170 INFO L625 ElimStorePlain]: treesize reduction 46, result has 70.9 percent of original size [2021-01-06 11:25:37,172 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:37,172 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:135, output treesize:112 [2021-01-06 11:25:37,824 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-01-06 11:25:38,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:38,536 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 89 [2021-01-06 11:25:38,536 INFO L348 Elim1Store]: treesize reduction 240, result has 46.5 percent of original size [2021-01-06 11:25:38,537 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 126 treesize of output 333 [2021-01-06 11:25:38,545 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:38,604 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:38,606 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:38,606 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:137, output treesize:102 [2021-01-06 11:25:39,898 WARN L197 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-01-06 11:25:40,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:40,385 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 53 [2021-01-06 11:25:40,386 INFO L348 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2021-01-06 11:25:40,387 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 105 treesize of output 205 [2021-01-06 11:25:40,393 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:40,539 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-01-06 11:25:40,540 INFO L625 ElimStorePlain]: treesize reduction 94, result has 51.8 percent of original size [2021-01-06 11:25:40,542 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:40,542 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:116, output treesize:101 [2021-01-06 11:25:41,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:41,862 WARN L197 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 89 [2021-01-06 11:25:41,863 INFO L348 Elim1Store]: treesize reduction 240, result has 46.5 percent of original size [2021-01-06 11:25:41,863 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 126 treesize of output 333 [2021-01-06 11:25:41,871 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:42,031 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-01-06 11:25:42,031 INFO L625 ElimStorePlain]: treesize reduction 86, result has 55.7 percent of original size [2021-01-06 11:25:42,033 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:42,034 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:137, output treesize:108 [2021-01-06 11:25:42,417 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-01-06 11:25:42,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:42,900 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 53 [2021-01-06 11:25:42,901 INFO L348 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2021-01-06 11:25:42,901 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 105 treesize of output 205 [2021-01-06 11:25:42,905 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:43,030 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-01-06 11:25:43,033 INFO L625 ElimStorePlain]: treesize reduction 70, result has 59.1 percent of original size [2021-01-06 11:25:43,035 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:43,035 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:116, output treesize:101 [2021-01-06 11:25:43,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:44,247 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 89 [2021-01-06 11:25:44,248 INFO L348 Elim1Store]: treesize reduction 240, result has 46.5 percent of original size [2021-01-06 11:25:44,249 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 126 treesize of output 333 [2021-01-06 11:25:44,263 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:44,424 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2021-01-06 11:25:44,425 INFO L625 ElimStorePlain]: treesize reduction 144, result has 43.8 percent of original size [2021-01-06 11:25:44,429 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-01-06 11:25:44,429 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:137, output treesize:112 [2021-01-06 11:25:44,754 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:25:44,755 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:25:44,756 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:44,758 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:25:44,766 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:25:44,768 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2021-01-06 11:25:44,776 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 14 disjuncts [2021-01-06 11:25:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:25:44,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:25:44,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35] total 67 [2021-01-06 11:25:44,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195107988] [2021-01-06 11:25:44,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-01-06 11:25:44,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:25:44,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-01-06 11:25:44,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=4176, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 11:25:44,974 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 67 states. [2021-01-06 11:25:47,885 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-01-06 11:25:48,130 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-01-06 11:25:48,553 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-01-06 11:25:48,842 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-01-06 11:25:49,159 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-01-06 11:25:49,735 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-01-06 11:25:50,051 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-01-06 11:25:50,434 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-01-06 11:25:50,767 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-01-06 11:25:51,168 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-01-06 11:25:51,682 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-01-06 11:25:52,024 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-01-06 11:25:52,430 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-01-06 11:25:52,839 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-01-06 11:25:53,167 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-01-06 11:25:53,557 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-01-06 11:25:54,105 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-01-06 11:25:54,456 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-01-06 11:25:54,887 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-01-06 11:25:55,375 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-01-06 11:25:55,767 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-01-06 11:25:56,269 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-01-06 11:25:56,837 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-01-06 11:25:57,545 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-01-06 11:25:58,106 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-01-06 11:25:59,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:25:59,261 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2021-01-06 11:25:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 11:25:59,263 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 46 [2021-01-06 11:25:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:25:59,264 INFO L225 Difference]: With dead ends: 101 [2021-01-06 11:25:59,264 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 11:25:59,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3315 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=632, Invalid=10710, Unknown=0, NotChecked=0, Total=11342 [2021-01-06 11:25:59,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 11:25:59,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2021-01-06 11:25:59,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 11:25:59,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-01-06 11:25:59,293 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 46 [2021-01-06 11:25:59,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:25:59,293 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-01-06 11:25:59,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2021-01-06 11:25:59,293 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-01-06 11:25:59,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 11:25:59,294 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:25:59,294 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:25:59,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:59,497 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:25:59,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:25:59,498 INFO L82 PathProgramCache]: Analyzing trace with hash 568845021, now seen corresponding path program 6 times [2021-01-06 11:25:59,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:25:59,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820144392] [2021-01-06 11:25:59,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:25:59,510 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:25:59,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235475094] [2021-01-06 11:25:59,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:25:59,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 11:25:59,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:25:59,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 11:25:59,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:25:59,690 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:25:59,691 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:59,701 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:59,702 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:59,702 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 11:25:59,760 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-01-06 11:25:59,760 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-01-06 11:25:59,762 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:25:59,778 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:25:59,779 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:25:59,780 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-01-06 11:25:59,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:25:59,955 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2021-01-06 11:25:59,956 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2021-01-06 11:25:59,958 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:00,001 INFO L625 ElimStorePlain]: treesize reduction 51, result has 42.0 percent of original size [2021-01-06 11:26:00,003 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:00,004 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:37 [2021-01-06 11:26:00,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:00,061 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2021-01-06 11:26:00,062 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2021-01-06 11:26:00,064 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:00,106 INFO L625 ElimStorePlain]: treesize reduction 59, result has 38.5 percent of original size [2021-01-06 11:26:00,107 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:00,108 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:37 [2021-01-06 11:26:00,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:00,166 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2021-01-06 11:26:00,166 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2021-01-06 11:26:00,169 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:00,214 INFO L625 ElimStorePlain]: treesize reduction 42, result has 46.8 percent of original size [2021-01-06 11:26:00,215 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:00,215 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:37 [2021-01-06 11:26:00,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:00,278 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2021-01-06 11:26:00,278 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2021-01-06 11:26:00,281 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:00,332 INFO L625 ElimStorePlain]: treesize reduction 42, result has 46.8 percent of original size [2021-01-06 11:26:00,334 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:00,334 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:37 [2021-01-06 11:26:00,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:00,408 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2021-01-06 11:26:00,408 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2021-01-06 11:26:00,414 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:00,459 INFO L625 ElimStorePlain]: treesize reduction 50, result has 42.5 percent of original size [2021-01-06 11:26:00,462 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:00,462 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:32 [2021-01-06 11:26:00,542 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2021-01-06 11:26:00,543 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-01-06 11:26:00,545 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:00,567 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:00,568 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:26:00,569 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:26:00,572 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:26:00,573 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 4 xjuncts. [2021-01-06 11:26:00,574 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:56 [2021-01-06 11:26:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 11:26:00,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820144392] [2021-01-06 11:26:00,736 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:26:00,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235475094] [2021-01-06 11:26:00,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:26:00,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-01-06 11:26:00,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944942666] [2021-01-06 11:26:00,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 11:26:00,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:26:00,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 11:26:00,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:26:00,741 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 14 states. [2021-01-06 11:26:01,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:26:01,551 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-01-06 11:26:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 11:26:01,552 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2021-01-06 11:26:01,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:26:01,553 INFO L225 Difference]: With dead ends: 81 [2021-01-06 11:26:01,553 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 11:26:01,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-01-06 11:26:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 11:26:01,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2021-01-06 11:26:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 11:26:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-01-06 11:26:01,570 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 46 [2021-01-06 11:26:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:26:01,570 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-01-06 11:26:01,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 11:26:01,570 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-01-06 11:26:01,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 11:26:01,570 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:26:01,570 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:26:01,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 11:26:01,771 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:26:01,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:26:01,772 INFO L82 PathProgramCache]: Analyzing trace with hash 501777881, now seen corresponding path program 20 times [2021-01-06 11:26:01,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:26:01,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828141165] [2021-01-06 11:26:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:26:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:26:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:26:02,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828141165] [2021-01-06 11:26:02,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175016318] [2021-01-06 11:26:02,114 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:26:02,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:26:02,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:26:02,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 11:26:02,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:26:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 49 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:26:02,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:26:02,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-01-06 11:26:02,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043807208] [2021-01-06 11:26:02,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 11:26:02,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:26:02,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 11:26:02,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-01-06 11:26:02,527 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 28 states. [2021-01-06 11:26:03,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:26:03,957 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2021-01-06 11:26:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 11:26:03,959 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 48 [2021-01-06 11:26:03,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:26:03,960 INFO L225 Difference]: With dead ends: 98 [2021-01-06 11:26:03,960 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 11:26:03,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=429, Invalid=1463, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 11:26:03,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 11:26:03,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 55. [2021-01-06 11:26:03,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 11:26:03,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-01-06 11:26:03,977 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 48 [2021-01-06 11:26:03,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:26:03,977 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-01-06 11:26:03,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 11:26:03,978 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-01-06 11:26:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 11:26:03,978 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:26:03,978 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:26:04,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 11:26:04,192 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:26:04,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:26:04,193 INFO L82 PathProgramCache]: Analyzing trace with hash -198074805, now seen corresponding path program 21 times [2021-01-06 11:26:04,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:26:04,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169091005] [2021-01-06 11:26:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:26:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:26:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:26:04,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169091005] [2021-01-06 11:26:04,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502823962] [2021-01-06 11:26:04,532 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:26:04,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 11:26:04,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:26:04,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 11:26:04,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:26:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:26:05,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:26:05,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-01-06 11:26:05,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710814661] [2021-01-06 11:26:05,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 11:26:05,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:26:05,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 11:26:05,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-01-06 11:26:05,084 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 28 states. [2021-01-06 11:26:05,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:26:05,660 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2021-01-06 11:26:05,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 11:26:05,662 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 49 [2021-01-06 11:26:05,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:26:05,664 INFO L225 Difference]: With dead ends: 102 [2021-01-06 11:26:05,664 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 11:26:05,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 11:26:05,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 11:26:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2021-01-06 11:26:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 11:26:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-01-06 11:26:05,679 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 49 [2021-01-06 11:26:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:26:05,679 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-01-06 11:26:05,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 11:26:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-01-06 11:26:05,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 11:26:05,680 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:26:05,680 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:26:05,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 11:26:05,883 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:26:05,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:26:05,884 INFO L82 PathProgramCache]: Analyzing trace with hash -777284467, now seen corresponding path program 22 times [2021-01-06 11:26:05,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:26:05,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128606577] [2021-01-06 11:26:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:26:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:26:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:26:08,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128606577] [2021-01-06 11:26:08,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723325371] [2021-01-06 11:26:08,986 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:26:09,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:26:09,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:26:09,048 WARN L261 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 79 conjunts are in the unsatisfiable core [2021-01-06 11:26:09,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:26:09,062 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 11:26:09,067 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:09,075 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:09,079 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 11 treesize of output 7 [2021-01-06 11:26:09,080 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:09,091 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:09,092 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:09,092 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2021-01-06 11:26:09,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:26:09,107 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 [2021-01-06 11:26:09,109 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:09,124 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:09,125 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:09,125 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:26 [2021-01-06 11:26:09,369 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:09,369 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2021-01-06 11:26:09,375 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:09,432 INFO L625 ElimStorePlain]: treesize reduction 20, result has 62.3 percent of original size [2021-01-06 11:26:09,434 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:09,434 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-01-06 11:26:09,818 INFO L348 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2021-01-06 11:26:09,818 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2021-01-06 11:26:09,825 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:09,889 INFO L625 ElimStorePlain]: treesize reduction 20, result has 69.2 percent of original size [2021-01-06 11:26:09,890 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:09,890 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-01-06 11:26:10,396 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-01-06 11:26:10,397 INFO L348 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2021-01-06 11:26:10,397 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 140 [2021-01-06 11:26:10,403 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:10,499 INFO L625 ElimStorePlain]: treesize reduction 64, result has 44.3 percent of original size [2021-01-06 11:26:10,500 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:10,500 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:51 [2021-01-06 11:26:11,122 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2021-01-06 11:26:11,123 INFO L348 Elim1Store]: treesize reduction 114, result has 51.7 percent of original size [2021-01-06 11:26:11,124 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 155 [2021-01-06 11:26:11,126 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:11,241 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-01-06 11:26:11,242 INFO L625 ElimStorePlain]: treesize reduction 64, result has 49.6 percent of original size [2021-01-06 11:26:11,243 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:11,243 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:63 [2021-01-06 11:26:12,017 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 56 [2021-01-06 11:26:12,018 INFO L348 Elim1Store]: treesize reduction 112, result has 62.7 percent of original size [2021-01-06 11:26:12,018 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 224 [2021-01-06 11:26:12,022 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:12,208 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-01-06 11:26:12,209 INFO L625 ElimStorePlain]: treesize reduction 108, result has 39.0 percent of original size [2021-01-06 11:26:12,210 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:12,211 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:69 [2021-01-06 11:26:13,196 WARN L197 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 66 [2021-01-06 11:26:13,197 INFO L348 Elim1Store]: treesize reduction 170, result has 57.2 percent of original size [2021-01-06 11:26:13,197 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 266 [2021-01-06 11:26:13,202 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:13,398 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-01-06 11:26:13,398 INFO L625 ElimStorePlain]: treesize reduction 130, result has 37.5 percent of original size [2021-01-06 11:26:13,400 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:13,400 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:82, output treesize:78 [2021-01-06 11:26:14,567 WARN L197 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 76 [2021-01-06 11:26:14,568 INFO L348 Elim1Store]: treesize reduction 240, result has 52.6 percent of original size [2021-01-06 11:26:14,568 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 308 [2021-01-06 11:26:14,573 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:14,804 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2021-01-06 11:26:14,805 INFO L625 ElimStorePlain]: treesize reduction 152, result has 37.2 percent of original size [2021-01-06 11:26:14,806 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:14,806 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:94, output treesize:90 [2021-01-06 11:26:16,679 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 60 [2021-01-06 11:26:16,680 INFO L348 Elim1Store]: treesize reduction 322, result has 25.6 percent of original size [2021-01-06 11:26:16,680 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 114 treesize of output 231 [2021-01-06 11:26:16,686 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:16,855 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-01-06 11:26:16,856 INFO L625 ElimStorePlain]: treesize reduction 120, result has 47.1 percent of original size [2021-01-06 11:26:16,857 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:16,857 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:124, output treesize:107 [2021-01-06 11:26:17,917 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-01-06 11:26:18,428 WARN L197 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 100 [2021-01-06 11:26:18,430 INFO L348 Elim1Store]: treesize reduction 322, result has 42.4 percent of original size [2021-01-06 11:26:18,431 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 133 treesize of output 371 [2021-01-06 11:26:18,441 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:18,654 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 58 [2021-01-06 11:26:18,655 INFO L625 ElimStorePlain]: treesize reduction 242, result has 35.6 percent of original size [2021-01-06 11:26:18,657 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:18,658 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:143, output treesize:134 [2021-01-06 11:26:19,189 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-01-06 11:26:19,784 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-01-06 11:26:20,641 WARN L197 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 144 [2021-01-06 11:26:20,642 INFO L348 Elim1Store]: treesize reduction 322, result has 54.1 percent of original size [2021-01-06 11:26:20,642 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 160 treesize of output 531 [2021-01-06 11:26:20,662 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:20,897 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2021-01-06 11:26:20,898 INFO L625 ElimStorePlain]: treesize reduction 220, result has 38.9 percent of original size [2021-01-06 11:26:20,900 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:20,900 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:170, output treesize:140 [2021-01-06 11:26:22,307 WARN L197 SmtUtils]: Spent 910.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-01-06 11:26:23,101 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-01-06 11:26:23,995 WARN L197 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 144 [2021-01-06 11:26:23,996 INFO L348 Elim1Store]: treesize reduction 322, result has 54.1 percent of original size [2021-01-06 11:26:23,997 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 155 treesize of output 530 [2021-01-06 11:26:24,011 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:24,278 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 62 [2021-01-06 11:26:24,279 INFO L625 ElimStorePlain]: treesize reduction 264, result has 34.7 percent of original size [2021-01-06 11:26:24,281 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:24,282 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:165, output treesize:140 [2021-01-06 11:26:25,054 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-01-06 11:26:25,758 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-01-06 11:26:26,663 WARN L197 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 144 [2021-01-06 11:26:26,664 INFO L348 Elim1Store]: treesize reduction 322, result has 54.1 percent of original size [2021-01-06 11:26:26,665 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 155 treesize of output 530 [2021-01-06 11:26:26,677 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:26,936 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-01-06 11:26:26,937 INFO L625 ElimStorePlain]: treesize reduction 172, result has 44.9 percent of original size [2021-01-06 11:26:26,939 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:26,940 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:165, output treesize:140 [2021-01-06 11:26:27,780 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-01-06 11:26:28,521 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-01-06 11:26:29,459 WARN L197 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 144 [2021-01-06 11:26:29,461 INFO L348 Elim1Store]: treesize reduction 322, result has 54.1 percent of original size [2021-01-06 11:26:29,462 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 155 treesize of output 530 [2021-01-06 11:26:29,473 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:29,716 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-01-06 11:26:29,717 INFO L625 ElimStorePlain]: treesize reduction 88, result has 59.1 percent of original size [2021-01-06 11:26:29,718 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:29,718 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:165, output treesize:127 [2021-01-06 11:26:32,047 WARN L197 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-01-06 11:26:32,672 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-01-06 11:26:32,899 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 60 [2021-01-06 11:26:32,900 INFO L348 Elim1Store]: treesize reduction 322, result has 25.6 percent of original size [2021-01-06 11:26:32,901 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 114 treesize of output 231 [2021-01-06 11:26:32,906 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:32,992 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:32,993 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:32,993 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:124, output treesize:99 [2021-01-06 11:26:34,818 WARN L197 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 52 [2021-01-06 11:26:35,695 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-01-06 11:26:35,918 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 60 [2021-01-06 11:26:35,919 INFO L348 Elim1Store]: treesize reduction 322, result has 25.6 percent of original size [2021-01-06 11:26:35,919 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 114 treesize of output 231 [2021-01-06 11:26:35,924 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:36,016 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:36,018 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:36,018 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:124, output treesize:99 [2021-01-06 11:26:36,494 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:26:36,496 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:26:36,496 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:26:36,497 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:26:36,500 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:26:36,502 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2021-01-06 11:26:36,506 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 14 disjuncts [2021-01-06 11:26:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:26:36,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:26:36,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 72 [2021-01-06 11:26:36,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642357627] [2021-01-06 11:26:36,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-01-06 11:26:36,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:26:36,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-01-06 11:26:36,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=4878, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 11:26:36,916 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 72 states. [2021-01-06 11:26:42,019 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-01-06 11:26:42,405 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-01-06 11:26:42,927 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-01-06 11:26:44,170 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-01-06 11:26:46,600 WARN L197 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-01-06 11:26:47,855 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-01-06 11:26:49,345 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-01-06 11:26:50,530 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-01-06 11:26:52,371 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-01-06 11:26:54,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:26:54,373 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2021-01-06 11:26:54,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 11:26:54,375 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 51 [2021-01-06 11:26:54,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:26:54,375 INFO L225 Difference]: With dead ends: 112 [2021-01-06 11:26:54,376 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 11:26:54,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=332, Invalid=6640, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 11:26:54,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 11:26:54,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-01-06 11:26:54,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 11:26:54,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2021-01-06 11:26:54,394 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 51 [2021-01-06 11:26:54,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:26:54,394 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2021-01-06 11:26:54,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2021-01-06 11:26:54,394 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2021-01-06 11:26:54,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 11:26:54,395 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:26:54,395 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:26:54,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:26:54,596 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:26:54,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:26:54,597 INFO L82 PathProgramCache]: Analyzing trace with hash -519119029, now seen corresponding path program 7 times [2021-01-06 11:26:54,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:26:54,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24707461] [2021-01-06 11:26:54,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:26:54,608 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:26:54,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129100225] [2021-01-06 11:26:54,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:26:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:26:54,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 11:26:54,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:26:54,696 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 11:26:54,699 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:54,707 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:54,708 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:54,708 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2021-01-06 11:26:54,821 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 15 treesize of output 11 [2021-01-06 11:26:54,823 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:54,841 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:54,842 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:54,843 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 11:26:54,958 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:54,958 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 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:26:54,960 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:55,014 INFO L625 ElimStorePlain]: treesize reduction 22, result has 56.0 percent of original size [2021-01-06 11:26:55,014 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:55,015 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-01-06 11:26:55,204 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:55,205 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 118 [2021-01-06 11:26:55,207 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:55,295 INFO L625 ElimStorePlain]: treesize reduction 50, result has 46.8 percent of original size [2021-01-06 11:26:55,298 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:55,298 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:44 [2021-01-06 11:26:57,187 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:57,188 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2021-01-06 11:26:57,191 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:57,267 INFO L625 ElimStorePlain]: treesize reduction 96, result has 32.9 percent of original size [2021-01-06 11:26:57,269 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:57,270 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:47 [2021-01-06 11:26:57,492 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:57,493 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2021-01-06 11:26:57,496 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:57,572 INFO L625 ElimStorePlain]: treesize reduction 64, result has 42.3 percent of original size [2021-01-06 11:26:57,574 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:57,574 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:47 [2021-01-06 11:26:57,793 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:57,794 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2021-01-06 11:26:57,799 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:57,872 INFO L625 ElimStorePlain]: treesize reduction 96, result has 32.9 percent of original size [2021-01-06 11:26:57,875 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:57,875 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:47 [2021-01-06 11:26:58,108 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:58,108 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2021-01-06 11:26:58,112 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:58,199 INFO L625 ElimStorePlain]: treesize reduction 102, result has 31.5 percent of original size [2021-01-06 11:26:58,201 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:58,202 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:47 [2021-01-06 11:26:58,380 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:58,380 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2021-01-06 11:26:58,383 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:58,459 INFO L625 ElimStorePlain]: treesize reduction 64, result has 42.3 percent of original size [2021-01-06 11:26:58,462 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:26:58,463 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:43 [2021-01-06 11:26:58,680 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:58,681 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2021-01-06 11:26:58,683 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:26:58,697 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:26:58,699 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:26:58,699 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:3 [2021-01-06 11:26:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 46 proven. 103 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 11:26:58,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24707461] [2021-01-06 11:26:58,769 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:26:58,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129100225] [2021-01-06 11:26:58,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:26:58,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-01-06 11:26:58,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916193115] [2021-01-06 11:26:58,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 11:26:58,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:26:58,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 11:26:58,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-01-06 11:26:58,771 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 21 states. [2021-01-06 11:27:01,552 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 11:27:02,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:27:02,655 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2021-01-06 11:27:02,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 11:27:02,658 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2021-01-06 11:27:02,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:27:02,658 INFO L225 Difference]: With dead ends: 88 [2021-01-06 11:27:02,659 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 11:27:02,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-01-06 11:27:02,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 11:27:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-01-06 11:27:02,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 11:27:02,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-01-06 11:27:02,681 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 51 [2021-01-06 11:27:02,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:27:02,682 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-01-06 11:27:02,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 11:27:02,682 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-01-06 11:27:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 11:27:02,682 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:27:02,682 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:27:02,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 11:27:02,896 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:27:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:27:02,896 INFO L82 PathProgramCache]: Analyzing trace with hash 947978831, now seen corresponding path program 23 times [2021-01-06 11:27:02,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:27:02,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812934125] [2021-01-06 11:27:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:27:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:27:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 49 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:27:03,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812934125] [2021-01-06 11:27:03,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482117694] [2021-01-06 11:27:03,520 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:27:03,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 11:27:03,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:27:03,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 11:27:03,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:27:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 64 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:27:04,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:27:04,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-01-06 11:27:04,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329459277] [2021-01-06 11:27:04,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 11:27:04,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:27:04,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 11:27:04,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2021-01-06 11:27:04,309 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 31 states. [2021-01-06 11:27:06,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:27:06,869 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2021-01-06 11:27:06,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 11:27:06,871 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 53 [2021-01-06 11:27:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:27:06,872 INFO L225 Difference]: With dead ends: 106 [2021-01-06 11:27:06,872 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 11:27:06,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=526, Invalid=1826, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 11:27:06,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 11:27:06,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 60. [2021-01-06 11:27:06,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 11:27:06,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-01-06 11:27:06,897 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 53 [2021-01-06 11:27:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:27:06,898 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-01-06 11:27:06,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 11:27:06,898 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-01-06 11:27:06,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 11:27:06,898 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:27:06,899 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:27:07,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:27:07,112 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:27:07,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:27:07,113 INFO L82 PathProgramCache]: Analyzing trace with hash -373843623, now seen corresponding path program 24 times [2021-01-06 11:27:07,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:27:07,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606323522] [2021-01-06 11:27:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:27:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:27:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 95 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:27:07,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606323522] [2021-01-06 11:27:07,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630322957] [2021-01-06 11:27:07,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:27:07,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 11:27:07,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:27:07,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 11:27:07,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:27:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:27:08,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:27:08,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-01-06 11:27:08,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527767487] [2021-01-06 11:27:08,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 11:27:08,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:27:08,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 11:27:08,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2021-01-06 11:27:08,580 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 31 states. [2021-01-06 11:27:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:27:09,471 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2021-01-06 11:27:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 11:27:09,474 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 54 [2021-01-06 11:27:09,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:27:09,474 INFO L225 Difference]: With dead ends: 110 [2021-01-06 11:27:09,474 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 11:27:09,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 11:27:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 11:27:09,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2021-01-06 11:27:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 11:27:09,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-01-06 11:27:09,491 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 54 [2021-01-06 11:27:09,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:27:09,491 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-01-06 11:27:09,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 11:27:09,491 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-01-06 11:27:09,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 11:27:09,491 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:27:09,492 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:27:09,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 11:27:09,692 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:27:09,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:27:09,693 INFO L82 PathProgramCache]: Analyzing trace with hash -928564137, now seen corresponding path program 25 times [2021-01-06 11:27:09,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:27:09,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510669643] [2021-01-06 11:27:09,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:27:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:27:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:27:14,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510669643] [2021-01-06 11:27:14,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297462476] [2021-01-06 11:27:14,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:27:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:27:14,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 92 conjunts are in the unsatisfiable core [2021-01-06 11:27:14,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:27:14,783 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 [2021-01-06 11:27:14,785 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:14,801 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:27:14,802 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:14,803 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 11:27:14,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:14,982 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 [2021-01-06 11:27:14,986 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:15,010 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:27:15,011 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:15,011 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2021-01-06 11:27:15,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:15,445 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:27:15,446 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2021-01-06 11:27:15,448 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:15,528 INFO L625 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-01-06 11:27:15,529 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:15,530 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-01-06 11:27:16,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:16,100 INFO L348 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2021-01-06 11:27:16,100 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2021-01-06 11:27:16,103 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:16,201 INFO L625 ElimStorePlain]: treesize reduction 20, result has 71.0 percent of original size [2021-01-06 11:27:16,202 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:16,203 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:49 [2021-01-06 11:27:16,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:16,883 INFO L348 Elim1Store]: treesize reduction 122, result has 31.5 percent of original size [2021-01-06 11:27:16,884 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 86 [2021-01-06 11:27:16,887 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:16,993 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-01-06 11:27:16,994 INFO L625 ElimStorePlain]: treesize reduction 20, result has 75.3 percent of original size [2021-01-06 11:27:16,995 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:16,995 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:61 [2021-01-06 11:27:17,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:17,729 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 32 [2021-01-06 11:27:17,730 INFO L348 Elim1Store]: treesize reduction 210, result has 24.5 percent of original size [2021-01-06 11:27:17,731 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 101 [2021-01-06 11:27:17,734 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:17,867 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-01-06 11:27:17,869 INFO L625 ElimStorePlain]: treesize reduction 20, result has 78.5 percent of original size [2021-01-06 11:27:17,870 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:17,870 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:73 [2021-01-06 11:27:18,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:18,756 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 37 [2021-01-06 11:27:18,757 INFO L348 Elim1Store]: treesize reduction 316, result has 20.2 percent of original size [2021-01-06 11:27:18,758 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 116 [2021-01-06 11:27:18,762 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:18,904 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-01-06 11:27:18,905 INFO L625 ElimStorePlain]: treesize reduction 20, result has 81.0 percent of original size [2021-01-06 11:27:18,906 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:18,907 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:85 [2021-01-06 11:27:19,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:19,920 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 42 [2021-01-06 11:27:19,921 INFO L348 Elim1Store]: treesize reduction 440, result has 17.3 percent of original size [2021-01-06 11:27:19,921 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 90 treesize of output 131 [2021-01-06 11:27:19,925 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:20,089 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-01-06 11:27:20,090 INFO L625 ElimStorePlain]: treesize reduction 20, result has 82.9 percent of original size [2021-01-06 11:27:20,091 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:20,092 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:101, output treesize:97 [2021-01-06 11:27:21,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:21,286 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 47 [2021-01-06 11:27:21,287 INFO L348 Elim1Store]: treesize reduction 582, result has 15.2 percent of original size [2021-01-06 11:27:21,288 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 146 [2021-01-06 11:27:21,293 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:21,480 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-01-06 11:27:21,481 INFO L625 ElimStorePlain]: treesize reduction 20, result has 84.5 percent of original size [2021-01-06 11:27:21,482 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:21,483 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:113, output treesize:109 [2021-01-06 11:27:22,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:23,194 WARN L197 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 86 [2021-01-06 11:27:23,195 INFO L348 Elim1Store]: treesize reduction 322, result has 48.6 percent of original size [2021-01-06 11:27:23,195 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 350 [2021-01-06 11:27:23,200 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:23,581 WARN L197 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-01-06 11:27:23,582 INFO L625 ElimStorePlain]: treesize reduction 174, result has 37.2 percent of original size [2021-01-06 11:27:23,587 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:27:23,588 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:107, output treesize:103 [2021-01-06 11:27:24,835 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-01-06 11:27:25,660 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-01-06 11:27:26,526 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-01-06 11:27:26,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:26,851 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 67 [2021-01-06 11:27:26,852 INFO L348 Elim1Store]: treesize reduction 416, result has 23.1 percent of original size [2021-01-06 11:27:26,852 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 123 treesize of output 257 [2021-01-06 11:27:26,861 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:27,133 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-01-06 11:27:27,134 INFO L625 ElimStorePlain]: treesize reduction 94, result has 55.5 percent of original size [2021-01-06 11:27:27,136 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:27,136 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:134, output treesize:117 [2021-01-06 11:27:28,203 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-01-06 11:27:29,247 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-01-06 11:27:29,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:29,982 WARN L197 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 111 [2021-01-06 11:27:29,984 INFO L348 Elim1Store]: treesize reduction 416, result has 38.9 percent of original size [2021-01-06 11:27:29,984 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 142 treesize of output 411 [2021-01-06 11:27:29,994 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:30,340 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 63 [2021-01-06 11:27:30,341 INFO L625 ElimStorePlain]: treesize reduction 346, result has 29.4 percent of original size [2021-01-06 11:27:30,343 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:30,344 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:153, output treesize:144 [2021-01-06 11:27:31,407 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-01-06 11:27:32,543 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-01-06 11:27:32,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:33,833 WARN L197 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 303 DAG size of output: 159 [2021-01-06 11:27:33,834 INFO L348 Elim1Store]: treesize reduction 416, result has 50.3 percent of original size [2021-01-06 11:27:33,836 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 169 treesize of output 585 [2021-01-06 11:27:33,851 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:34,251 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 68 [2021-01-06 11:27:34,252 INFO L625 ElimStorePlain]: treesize reduction 409, result has 27.6 percent of original size [2021-01-06 11:27:34,255 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:34,255 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:180, output treesize:156 [2021-01-06 11:27:35,576 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-01-06 11:27:36,719 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-01-06 11:27:36,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:38,089 WARN L197 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 303 DAG size of output: 159 [2021-01-06 11:27:38,091 INFO L348 Elim1Store]: treesize reduction 416, result has 50.3 percent of original size [2021-01-06 11:27:38,092 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 170 treesize of output 586 [2021-01-06 11:27:38,108 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:38,547 WARN L197 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 67 [2021-01-06 11:27:38,549 INFO L625 ElimStorePlain]: treesize reduction 172, result has 46.6 percent of original size [2021-01-06 11:27:38,551 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:38,552 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:181, output treesize:150 [2021-01-06 11:27:39,824 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-01-06 11:27:40,983 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-01-06 11:27:41,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:42,291 WARN L197 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 303 DAG size of output: 159 [2021-01-06 11:27:42,293 INFO L348 Elim1Store]: treesize reduction 416, result has 50.3 percent of original size [2021-01-06 11:27:42,293 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 164 treesize of output 584 [2021-01-06 11:27:42,308 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:42,797 WARN L197 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 68 [2021-01-06 11:27:42,798 INFO L625 ElimStorePlain]: treesize reduction 712, result has 19.6 percent of original size [2021-01-06 11:27:42,802 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:42,802 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:175, output treesize:174 [2021-01-06 11:27:44,020 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-01-06 11:27:45,256 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-01-06 11:27:45,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:47,397 WARN L197 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 355 DAG size of output: 211 [2021-01-06 11:27:47,399 INFO L348 Elim1Store]: treesize reduction 416, result has 58.8 percent of original size [2021-01-06 11:27:47,399 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 78 case distinctions, treesize of input 199 treesize of output 774 [2021-01-06 11:27:47,421 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:47,895 WARN L197 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 73 [2021-01-06 11:27:47,896 INFO L625 ElimStorePlain]: treesize reduction 407, result has 29.1 percent of original size [2021-01-06 11:27:47,900 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:47,901 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:210, output treesize:167 [2021-01-06 11:27:51,297 WARN L197 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-01-06 11:27:52,711 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-01-06 11:27:52,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:54,118 WARN L197 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 303 DAG size of output: 159 [2021-01-06 11:27:54,120 INFO L348 Elim1Store]: treesize reduction 416, result has 50.3 percent of original size [2021-01-06 11:27:54,121 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 170 treesize of output 586 [2021-01-06 11:27:54,136 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:54,603 WARN L197 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 68 [2021-01-06 11:27:54,604 INFO L625 ElimStorePlain]: treesize reduction 299, result has 34.3 percent of original size [2021-01-06 11:27:54,607 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:54,608 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:181, output treesize:156 [2021-01-06 11:27:56,099 WARN L197 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-01-06 11:27:57,561 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-01-06 11:27:57,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:27:58,983 WARN L197 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 303 DAG size of output: 159 [2021-01-06 11:27:58,985 INFO L348 Elim1Store]: treesize reduction 416, result has 50.3 percent of original size [2021-01-06 11:27:58,985 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 170 treesize of output 586 [2021-01-06 11:27:59,000 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:27:59,442 WARN L197 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 68 [2021-01-06 11:27:59,443 INFO L625 ElimStorePlain]: treesize reduction 193, result has 44.7 percent of original size [2021-01-06 11:27:59,446 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:27:59,447 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:181, output treesize:156 [2021-01-06 11:28:02,394 WARN L197 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 71 [2021-01-06 11:28:05,634 WARN L197 SmtUtils]: Spent 1.96 s on a formula simplification that was a NOOP. DAG size: 77 [2021-01-06 11:28:05,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:28:07,771 WARN L197 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 355 DAG size of output: 211 [2021-01-06 11:28:07,773 INFO L348 Elim1Store]: treesize reduction 416, result has 58.8 percent of original size [2021-01-06 11:28:07,774 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 78 case distinctions, treesize of input 181 treesize of output 772 [2021-01-06 11:28:07,804 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:28:08,539 WARN L197 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 73 [2021-01-06 11:28:08,540 INFO L625 ElimStorePlain]: treesize reduction 638, result has 20.7 percent of original size [2021-01-06 11:28:08,547 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2021-01-06 11:28:08,547 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:192, output treesize:167 [2021-01-06 11:28:09,686 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:28:09,689 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:28:09,692 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:28:09,694 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:28:09,714 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:28:09,720 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 15 disjuncts [2021-01-06 11:28:09,739 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 18 disjuncts [2021-01-06 11:28:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:28:10,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:28:10,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43] total 83 [2021-01-06 11:28:10,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350167391] [2021-01-06 11:28:10,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-01-06 11:28:10,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:28:10,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-01-06 11:28:10,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=6498, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 11:28:10,439 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 83 states. [2021-01-06 11:28:12,463 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-01-06 11:28:12,844 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-01-06 11:28:13,757 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-01-06 11:28:14,169 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-01-06 11:28:15,390 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-01-06 11:28:15,831 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-01-06 11:28:16,646 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-01-06 11:28:17,300 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-01-06 11:28:18,899 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-01-06 11:28:19,653 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-01-06 11:28:21,955 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-01-06 11:28:22,606 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-01-06 11:28:23,897 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-01-06 11:28:24,592 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-01-06 11:28:26,861 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-01-06 11:28:27,762 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57