/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-multidimensional/copy-partial-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:52:53,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:52:53,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:52:53,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:52:53,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:52:53,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:52:53,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:52:53,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:52:53,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:52:53,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:52:53,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:52:53,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:52:53,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:52:53,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:52:53,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:52:53,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:52:53,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:52:53,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:52:53,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:52:53,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:52:53,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:52:53,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:52:53,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:52:53,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:52:53,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:52:53,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:52:53,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:52:53,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:52:53,506 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:52:53,561 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:52:53,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:52:53,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:52:53,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:52:53,568 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:52:53,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:52:53,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:52:53,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:52:53,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:52:53,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:52:53,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:52:53,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:52:53,571 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:52:53,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:52:53,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:52:53,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:52:53,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:52:53,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:52:53,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:52:53,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:52:53,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:52:53,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:52:53,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:52:53,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:52:53,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:52:53,575 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:52:54,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:52:54,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:52:54,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:52:54,118 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:52:54,119 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:52:54,120 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2020-12-23 00:52:54,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/22cf103f5/c78ec9e1add249d8879999fdd818f240/FLAG009b6476e [2020-12-23 00:52:54,919 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:52:54,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2020-12-23 00:52:54,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/22cf103f5/c78ec9e1add249d8879999fdd818f240/FLAG009b6476e [2020-12-23 00:52:55,272 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/22cf103f5/c78ec9e1add249d8879999fdd818f240 [2020-12-23 00:52:55,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:52:55,277 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:52:55,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:52:55,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:52:55,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:52:55,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:52:55" (1/1) ... [2020-12-23 00:52:55,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@84f7bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:55, skipping insertion in model container [2020-12-23 00:52:55,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:52:55" (1/1) ... [2020-12-23 00:52:55,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:52:55,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:52:55,479 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-multidimensional/copy-partial-2-n-u.c[416,429] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~B~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:52:55,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:52:55,516 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:52:55,531 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-multidimensional/copy-partial-2-n-u.c[416,429] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#B~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#B~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:52:55,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:52:55,561 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:52:55,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:55 WrapperNode [2020-12-23 00:52:55,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:52:55,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:52:55,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:52:55,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:52:55,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:55" (1/1) ... [2020-12-23 00:52:55,582 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:55" (1/1) ... [2020-12-23 00:52:55,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:52:55,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:52:55,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:52:55,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:52:55,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:55" (1/1) ... [2020-12-23 00:52:55,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:55" (1/1) ... [2020-12-23 00:52:55,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:55" (1/1) ... [2020-12-23 00:52:55,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:55" (1/1) ... [2020-12-23 00:52:55,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:55" (1/1) ... [2020-12-23 00:52:55,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:55" (1/1) ... [2020-12-23 00:52:55,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:55" (1/1) ... [2020-12-23 00:52:55,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:52:55,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:52:55,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:52:55,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:52:55,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:52:55,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:52:55,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:52:55,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:52:55,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:52:55,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:52:55,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:52:55,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:52:56,294 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:52:56,297 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-23 00:52:56,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:52:56 BoogieIcfgContainer [2020-12-23 00:52:56,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:52:56,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:52:56,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:52:56,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:52:56,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:52:55" (1/3) ... [2020-12-23 00:52:56,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e360fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:52:56, skipping insertion in model container [2020-12-23 00:52:56,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:55" (2/3) ... [2020-12-23 00:52:56,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e360fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:52:56, skipping insertion in model container [2020-12-23 00:52:56,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:52:56" (3/3) ... [2020-12-23 00:52:56,326 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2020-12-23 00:52:56,334 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:52:56,341 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:52:56,365 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:52:56,399 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:52:56,399 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:52:56,399 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:52:56,400 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:52:56,400 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:52:56,400 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:52:56,400 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:52:56,400 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:52:56,419 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-23 00:52:56,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 00:52:56,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:56,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:56,428 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:56,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:56,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1415775140, now seen corresponding path program 1 times [2020-12-23 00:52:56,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:56,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89033640] [2020-12-23 00:52:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:56,612 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:56,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49899628] [2020-12-23 00:52:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:56,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-23 00:52:56,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:52:56,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89033640] [2020-12-23 00:52:56,859 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:56,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49899628] [2020-12-23 00:52:56,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:52:56,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:52:56,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143678155] [2020-12-23 00:52:56,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:52:56,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:56,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:52:56,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:52:56,898 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-12-23 00:52:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:56,928 INFO L93 Difference]: Finished difference Result 47 states and 74 transitions. [2020-12-23 00:52:56,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:52:56,931 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-12-23 00:52:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:56,960 INFO L225 Difference]: With dead ends: 47 [2020-12-23 00:52:56,960 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 00:52:56,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:52:56,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 00:52:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 00:52:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 00:52:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-12-23 00:52:57,017 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 14 [2020-12-23 00:52:57,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:57,018 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-12-23 00:52:57,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:52:57,019 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-12-23 00:52:57,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 00:52:57,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:57,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:57,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 00:52:57,237 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:57,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:57,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1550636712, now seen corresponding path program 1 times [2020-12-23 00:52:57,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:57,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185432760] [2020-12-23 00:52:57,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:57,254 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:57,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861071087] [2020-12-23 00:52:57,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:57,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:52:57,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:52:57,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185432760] [2020-12-23 00:52:57,453 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:57,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861071087] [2020-12-23 00:52:57,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:52:57,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:52:57,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048264020] [2020-12-23 00:52:57,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:52:57,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:57,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:52:57,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:52:57,458 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 4 states. [2020-12-23 00:52:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:57,555 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2020-12-23 00:52:57,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:52:57,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-23 00:52:57,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:57,557 INFO L225 Difference]: With dead ends: 47 [2020-12-23 00:52:57,557 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 00:52:57,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:52:57,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 00:52:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2020-12-23 00:52:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 00:52:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2020-12-23 00:52:57,567 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2020-12-23 00:52:57,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:57,567 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2020-12-23 00:52:57,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:52:57,567 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2020-12-23 00:52:57,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:52:57,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:57,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:57,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:57,784 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:57,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:57,786 INFO L82 PathProgramCache]: Analyzing trace with hash -470604791, now seen corresponding path program 1 times [2020-12-23 00:52:57,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:57,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411996246] [2020-12-23 00:52:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:57,799 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:57,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502663808] [2020-12-23 00:52:57,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:57,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:52:57,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:52:57,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411996246] [2020-12-23 00:52:57,941 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:57,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502663808] [2020-12-23 00:52:57,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:52:57,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:52:57,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744951369] [2020-12-23 00:52:57,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:52:57,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:57,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:52:57,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:52:57,944 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 4 states. [2020-12-23 00:52:58,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:58,054 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-12-23 00:52:58,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:52:58,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-23 00:52:58,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:58,060 INFO L225 Difference]: With dead ends: 49 [2020-12-23 00:52:58,060 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 00:52:58,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:52:58,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 00:52:58,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2020-12-23 00:52:58,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 00:52:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-23 00:52:58,078 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 17 [2020-12-23 00:52:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:58,079 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-23 00:52:58,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:52:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-23 00:52:58,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 00:52:58,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:58,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:58,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:58,285 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:58,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:58,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1905500103, now seen corresponding path program 1 times [2020-12-23 00:52:58,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:58,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800610929] [2020-12-23 00:52:58,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:58,298 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:58,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804089124] [2020-12-23 00:52:58,298 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:58,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:58,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:52:58,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:52:58,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800610929] [2020-12-23 00:52:58,486 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:58,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804089124] [2020-12-23 00:52:58,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:52:58,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:52:58,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728127866] [2020-12-23 00:52:58,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:52:58,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:58,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:52:58,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:52:58,493 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2020-12-23 00:52:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:58,678 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2020-12-23 00:52:58,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:52:58,679 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-23 00:52:58,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:58,682 INFO L225 Difference]: With dead ends: 62 [2020-12-23 00:52:58,682 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 00:52:58,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:52:58,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 00:52:58,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 24. [2020-12-23 00:52:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 00:52:58,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-23 00:52:58,705 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 18 [2020-12-23 00:52:58,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:58,706 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-23 00:52:58,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:52:58,706 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-23 00:52:58,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:52:58,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:58,708 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:58,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:58,922 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:58,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:58,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1744659511, now seen corresponding path program 2 times [2020-12-23 00:52:58,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:58,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465427892] [2020-12-23 00:52:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:58,947 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:58,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222835837] [2020-12-23 00:52:58,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:59,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 00:52:59,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:52:59,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:52:59,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:52:59,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465427892] [2020-12-23 00:52:59,133 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:59,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222835837] [2020-12-23 00:52:59,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:52:59,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:52:59,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653378979] [2020-12-23 00:52:59,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:52:59,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:59,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:52:59,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:52:59,139 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2020-12-23 00:52:59,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:59,220 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-12-23 00:52:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:52:59,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-23 00:52:59,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:59,222 INFO L225 Difference]: With dead ends: 46 [2020-12-23 00:52:59,222 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 00:52:59,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:52:59,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 00:52:59,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2020-12-23 00:52:59,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 00:52:59,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-12-23 00:52:59,229 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 19 [2020-12-23 00:52:59,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:59,230 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-12-23 00:52:59,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:52:59,230 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-12-23 00:52:59,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 00:52:59,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:59,231 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:59,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:59,446 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:59,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:59,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1052069172, now seen corresponding path program 1 times [2020-12-23 00:52:59,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:59,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715211138] [2020-12-23 00:52:59,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:59,459 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:59,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907095115] [2020-12-23 00:52:59,460 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:59,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:52:59,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:52:59,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715211138] [2020-12-23 00:52:59,598 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:59,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907095115] [2020-12-23 00:52:59,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:52:59,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:52:59,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266898026] [2020-12-23 00:52:59,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:52:59,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:59,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:52:59,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:52:59,601 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 6 states. [2020-12-23 00:52:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:59,706 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-12-23 00:52:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:52:59,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-12-23 00:52:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:59,708 INFO L225 Difference]: With dead ends: 77 [2020-12-23 00:52:59,708 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 00:52:59,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:52:59,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 00:52:59,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 26. [2020-12-23 00:52:59,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 00:52:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-12-23 00:52:59,716 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 22 [2020-12-23 00:52:59,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:59,717 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-12-23 00:52:59,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:52:59,717 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-12-23 00:52:59,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 00:52:59,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:59,718 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:59,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:59,932 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:59,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:59,933 INFO L82 PathProgramCache]: Analyzing trace with hash -537403954, now seen corresponding path program 2 times [2020-12-23 00:52:59,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:59,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709832128] [2020-12-23 00:52:59,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:59,945 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:59,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891196081] [2020-12-23 00:52:59,946 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:00,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:53:00,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:00,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:53:00,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:53:00,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709832128] [2020-12-23 00:53:00,103 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:00,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891196081] [2020-12-23 00:53:00,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:00,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:53:00,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39574728] [2020-12-23 00:53:00,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:53:00,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:00,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:53:00,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:53:00,105 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 5 states. [2020-12-23 00:53:00,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:00,188 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2020-12-23 00:53:00,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:53:00,188 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-23 00:53:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:00,189 INFO L225 Difference]: With dead ends: 65 [2020-12-23 00:53:00,189 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 00:53:00,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:53:00,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 00:53:00,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2020-12-23 00:53:00,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 00:53:00,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-23 00:53:00,197 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 23 [2020-12-23 00:53:00,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:00,198 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-23 00:53:00,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:53:00,198 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-23 00:53:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 00:53:00,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:00,199 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:00,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:00,408 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:00,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:00,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1757907289, now seen corresponding path program 3 times [2020-12-23 00:53:00,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:00,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118662856] [2020-12-23 00:53:00,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:00,434 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:00,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529209296] [2020-12-23 00:53:00,435 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:00,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:53:00,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:00,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:53:00,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 00:53:00,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118662856] [2020-12-23 00:53:00,579 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:00,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529209296] [2020-12-23 00:53:00,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:00,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:53:00,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293847941] [2020-12-23 00:53:00,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:53:00,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:00,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:53:00,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:53:00,583 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 5 states. [2020-12-23 00:53:00,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:00,681 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2020-12-23 00:53:00,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:53:00,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-23 00:53:00,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:00,685 INFO L225 Difference]: With dead ends: 72 [2020-12-23 00:53:00,685 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 00:53:00,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:53:00,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 00:53:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2020-12-23 00:53:00,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 00:53:00,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2020-12-23 00:53:00,712 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 26 [2020-12-23 00:53:00,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:00,712 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2020-12-23 00:53:00,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:53:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2020-12-23 00:53:00,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:53:00,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:00,717 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:00,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 00:53:00,922 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:00,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:00,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1349050070, now seen corresponding path program 4 times [2020-12-23 00:53:00,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:00,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319157709] [2020-12-23 00:53:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:00,932 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:00,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542662155] [2020-12-23 00:53:00,933 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:00,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:53:00,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:00,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:53:00,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-23 00:53:01,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319157709] [2020-12-23 00:53:01,064 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:01,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542662155] [2020-12-23 00:53:01,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:01,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:53:01,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813534813] [2020-12-23 00:53:01,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:53:01,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:01,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:53:01,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:53:01,069 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 5 states. [2020-12-23 00:53:01,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:01,150 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-12-23 00:53:01,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:53:01,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-12-23 00:53:01,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:01,154 INFO L225 Difference]: With dead ends: 68 [2020-12-23 00:53:01,154 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 00:53:01,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:53:01,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 00:53:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-12-23 00:53:01,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 00:53:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-12-23 00:53:01,165 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 32 [2020-12-23 00:53:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:01,165 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-12-23 00:53:01,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:53:01,165 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-12-23 00:53:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 00:53:01,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:01,166 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:01,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:01,374 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:01,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:01,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1147617196, now seen corresponding path program 1 times [2020-12-23 00:53:01,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:01,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138010270] [2020-12-23 00:53:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:01,387 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:01,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809952847] [2020-12-23 00:53:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:53:01,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:53:01,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 00:53:01,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138010270] [2020-12-23 00:53:01,585 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:01,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809952847] [2020-12-23 00:53:01,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:01,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:53:01,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309806956] [2020-12-23 00:53:01,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:53:01,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:01,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:53:01,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:53:01,588 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 7 states. [2020-12-23 00:53:01,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:01,706 INFO L93 Difference]: Finished difference Result 114 states and 141 transitions. [2020-12-23 00:53:01,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:53:01,706 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-12-23 00:53:01,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:01,707 INFO L225 Difference]: With dead ends: 114 [2020-12-23 00:53:01,707 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 00:53:01,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:53:01,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 00:53:01,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 40. [2020-12-23 00:53:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 00:53:01,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-12-23 00:53:01,718 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 34 [2020-12-23 00:53:01,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:01,718 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-12-23 00:53:01,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:53:01,719 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-12-23 00:53:01,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 00:53:01,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:01,720 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:01,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:01,934 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:01,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:01,936 INFO L82 PathProgramCache]: Analyzing trace with hash -624474346, now seen corresponding path program 2 times [2020-12-23 00:53:01,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:01,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183906898] [2020-12-23 00:53:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:01,946 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:01,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396846080] [2020-12-23 00:53:01,947 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:02,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:53:02,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:02,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:53:02,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 00:53:02,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183906898] [2020-12-23 00:53:02,153 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:02,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396846080] [2020-12-23 00:53:02,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:02,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:53:02,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970995390] [2020-12-23 00:53:02,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:53:02,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:02,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:53:02,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:53:02,155 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 8 states. [2020-12-23 00:53:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:02,293 INFO L93 Difference]: Finished difference Result 131 states and 162 transitions. [2020-12-23 00:53:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:53:02,293 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-12-23 00:53:02,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:02,294 INFO L225 Difference]: With dead ends: 131 [2020-12-23 00:53:02,295 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 00:53:02,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:53:02,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 00:53:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 42. [2020-12-23 00:53:02,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 00:53:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-12-23 00:53:02,305 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 36 [2020-12-23 00:53:02,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:02,306 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-12-23 00:53:02,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:53:02,306 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-12-23 00:53:02,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 00:53:02,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:02,307 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:02,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:53:02,521 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:02,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:02,522 INFO L82 PathProgramCache]: Analyzing trace with hash 259555604, now seen corresponding path program 3 times [2020-12-23 00:53:02,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:02,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632483478] [2020-12-23 00:53:02,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:02,532 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:02,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171280750] [2020-12-23 00:53:02,533 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:02,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:53:02,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:02,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 00:53:02,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:02,648 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:53:02,654 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:53:02,718 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 [2020-12-23 00:53:02,723 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:53:02,734 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:53:02,735 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:53:02,735 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-23 00:53:02,896 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 15 treesize of output 15 [2020-12-23 00:53:02,899 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:53:02,910 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:53:02,911 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:53:02,913 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2020-12-23 00:53:02,980 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:53:02,981 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 2 case distinctions, treesize of input 45 treesize of output 101 [2020-12-23 00:53:02,992 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:53:03,041 INFO L625 ElimStorePlain]: treesize reduction 78, result has 40.9 percent of original size [2020-12-23 00:53:03,044 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. [2020-12-23 00:53:03,044 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:54 [2020-12-23 00:53:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-23 00:53:03,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632483478] [2020-12-23 00:53:03,158 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:03,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171280750] [2020-12-23 00:53:03,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:03,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:53:03,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90164606] [2020-12-23 00:53:03,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:53:03,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:03,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:53:03,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:53:03,160 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 10 states. [2020-12-23 00:53:03,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:03,372 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-12-23 00:53:03,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:53:03,373 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-12-23 00:53:03,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:03,374 INFO L225 Difference]: With dead ends: 58 [2020-12-23 00:53:03,374 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 00:53:03,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:53:03,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 00:53:03,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2020-12-23 00:53:03,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 00:53:03,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-12-23 00:53:03,392 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 38 [2020-12-23 00:53:03,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:03,395 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-12-23 00:53:03,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:53:03,395 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-12-23 00:53:03,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 00:53:03,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:03,398 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:03,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:03,613 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:03,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:03,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1484747811, now seen corresponding path program 1 times [2020-12-23 00:53:03,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:03,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623794943] [2020-12-23 00:53:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:03,624 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:03,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834081210] [2020-12-23 00:53:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:53:03,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:53:03,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 00:53:03,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623794943] [2020-12-23 00:53:03,839 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:03,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834081210] [2020-12-23 00:53:03,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:03,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:53:03,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668656643] [2020-12-23 00:53:03,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:53:03,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:03,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:53:03,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:53:03,845 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 9 states. [2020-12-23 00:53:04,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:04,019 INFO L93 Difference]: Finished difference Result 153 states and 188 transitions. [2020-12-23 00:53:04,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:53:04,020 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-12-23 00:53:04,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:04,021 INFO L225 Difference]: With dead ends: 153 [2020-12-23 00:53:04,021 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 00:53:04,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:53:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 00:53:04,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 47. [2020-12-23 00:53:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 00:53:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-12-23 00:53:04,038 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 41 [2020-12-23 00:53:04,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:04,038 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-12-23 00:53:04,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:53:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-12-23 00:53:04,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 00:53:04,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:04,039 INFO L422 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:04,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:53:04,255 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:04,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:04,256 INFO L82 PathProgramCache]: Analyzing trace with hash -413800799, now seen corresponding path program 2 times [2020-12-23 00:53:04,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:04,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418694772] [2020-12-23 00:53:04,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:04,265 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:04,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216652885] [2020-12-23 00:53:04,266 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:04,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:53:04,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:04,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:53:04,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 00:53:04,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418694772] [2020-12-23 00:53:04,504 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:04,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216652885] [2020-12-23 00:53:04,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:04,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:53:04,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826285047] [2020-12-23 00:53:04,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:53:04,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:04,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:53:04,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:53:04,512 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 10 states. [2020-12-23 00:53:04,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:04,694 INFO L93 Difference]: Finished difference Result 170 states and 209 transitions. [2020-12-23 00:53:04,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:53:04,695 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-12-23 00:53:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:04,697 INFO L225 Difference]: With dead ends: 170 [2020-12-23 00:53:04,697 INFO L226 Difference]: Without dead ends: 137 [2020-12-23 00:53:04,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:53:04,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-23 00:53:04,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 49. [2020-12-23 00:53:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 00:53:04,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-12-23 00:53:04,719 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 43 [2020-12-23 00:53:04,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:04,719 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-12-23 00:53:04,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:53:04,719 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-12-23 00:53:04,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:53:04,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:04,722 INFO L422 BasicCegarLoop]: trace histogram [14, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:04,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:04,929 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:04,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:04,930 INFO L82 PathProgramCache]: Analyzing trace with hash 2059422563, now seen corresponding path program 3 times [2020-12-23 00:53:04,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:04,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204117720] [2020-12-23 00:53:04,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:04,948 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:04,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814090954] [2020-12-23 00:53:04,949 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:05,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:53:05,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:05,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:53:05,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-23 00:53:05,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204117720] [2020-12-23 00:53:05,139 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:05,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814090954] [2020-12-23 00:53:05,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:05,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:53:05,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997699135] [2020-12-23 00:53:05,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:53:05,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:05,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:53:05,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:53:05,141 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 5 states. [2020-12-23 00:53:05,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:05,199 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2020-12-23 00:53:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:53:05,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-12-23 00:53:05,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:05,200 INFO L225 Difference]: With dead ends: 78 [2020-12-23 00:53:05,200 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 00:53:05,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:53:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 00:53:05,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-12-23 00:53:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 00:53:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-12-23 00:53:05,214 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 45 [2020-12-23 00:53:05,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:05,214 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-12-23 00:53:05,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:53:05,214 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-12-23 00:53:05,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 00:53:05,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:05,215 INFO L422 BasicCegarLoop]: trace histogram [14, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:05,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:53:05,429 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:05,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:05,430 INFO L82 PathProgramCache]: Analyzing trace with hash -783048863, now seen corresponding path program 4 times [2020-12-23 00:53:05,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:05,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677724131] [2020-12-23 00:53:05,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:05,439 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:05,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908442345] [2020-12-23 00:53:05,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:05,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:53:05,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:05,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:53:05,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 00:53:05,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677724131] [2020-12-23 00:53:05,647 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:05,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908442345] [2020-12-23 00:53:05,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:05,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:53:05,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975158572] [2020-12-23 00:53:05,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:53:05,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:05,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:53:05,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:53:05,650 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 6 states. [2020-12-23 00:53:05,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:05,757 INFO L93 Difference]: Finished difference Result 140 states and 164 transitions. [2020-12-23 00:53:05,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:53:05,758 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-12-23 00:53:05,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:05,760 INFO L225 Difference]: With dead ends: 140 [2020-12-23 00:53:05,761 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 00:53:05,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:53:05,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 00:53:05,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 64. [2020-12-23 00:53:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 00:53:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-12-23 00:53:05,781 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 47 [2020-12-23 00:53:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:05,782 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-12-23 00:53:05,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:53:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-12-23 00:53:05,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 00:53:05,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:05,783 INFO L422 BasicCegarLoop]: trace histogram [21, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:05,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:53:05,997 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:05,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:05,997 INFO L82 PathProgramCache]: Analyzing trace with hash -88622574, now seen corresponding path program 5 times [2020-12-23 00:53:05,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:05,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130084440] [2020-12-23 00:53:05,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:06,008 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:06,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129893097] [2020-12-23 00:53:06,009 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:18,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-12-23 00:53:18,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:18,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:53:18,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 198 proven. 28 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-23 00:53:18,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130084440] [2020-12-23 00:53:18,671 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:18,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129893097] [2020-12-23 00:53:18,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:18,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 00:53:18,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140728113] [2020-12-23 00:53:18,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:53:18,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:18,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:53:18,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:53:18,673 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 11 states. [2020-12-23 00:53:18,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:18,877 INFO L93 Difference]: Finished difference Result 206 states and 249 transitions. [2020-12-23 00:53:18,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:53:18,877 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-12-23 00:53:18,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:18,879 INFO L225 Difference]: With dead ends: 206 [2020-12-23 00:53:18,879 INFO L226 Difference]: Without dead ends: 157 [2020-12-23 00:53:18,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:53:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-23 00:53:18,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 67. [2020-12-23 00:53:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 00:53:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2020-12-23 00:53:18,896 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 57 [2020-12-23 00:53:18,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:18,897 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2020-12-23 00:53:18,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:53:18,897 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2020-12-23 00:53:18,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 00:53:18,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:18,898 INFO L422 BasicCegarLoop]: trace histogram [24, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:19,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:53:19,112 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:19,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:19,112 INFO L82 PathProgramCache]: Analyzing trace with hash -326577266, now seen corresponding path program 6 times [2020-12-23 00:53:19,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:19,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393780663] [2020-12-23 00:53:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:19,134 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:19,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703975014] [2020-12-23 00:53:19,134 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:19,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:53:19,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:19,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 00:53:19,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:19,638 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:53:19,654 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:53:19,655 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:53:19,661 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 [2020-12-23 00:53:19,662 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:53:19,675 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:53:19,676 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:53:19,677 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:23 [2020-12-23 00:53:19,847 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 19 treesize of output 19 [2020-12-23 00:53:19,848 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:53:19,862 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:53:19,863 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:53:19,863 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2020-12-23 00:53:19,928 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:53:19,928 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 2 case distinctions, treesize of input 49 treesize of output 113 [2020-12-23 00:53:19,933 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:53:19,988 INFO L625 ElimStorePlain]: treesize reduction 82, result has 45.7 percent of original size [2020-12-23 00:53:19,990 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. [2020-12-23 00:53:19,991 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:69 [2020-12-23 00:53:20,110 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:53:20,110 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 78 treesize of output 273 [2020-12-23 00:53:20,118 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:53:20,227 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-12-23 00:53:20,229 INFO L625 ElimStorePlain]: treesize reduction 201, result has 33.9 percent of original size [2020-12-23 00:53:20,236 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. [2020-12-23 00:53:20,236 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:107, output treesize:103 [2020-12-23 00:53:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2020-12-23 00:53:20,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393780663] [2020-12-23 00:53:20,785 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:20,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703975014] [2020-12-23 00:53:20,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:20,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-23 00:53:20,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777857941] [2020-12-23 00:53:20,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:53:20,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:20,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:53:20,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:53:20,787 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 17 states. [2020-12-23 00:53:23,315 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-23 00:54:03,482 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 62 [2020-12-23 00:54:12,295 WARN L197 SmtUtils]: Spent 2.32 s on a formula simplification that was a NOOP. DAG size: 60 [2020-12-23 00:54:36,711 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 54 [2020-12-23 00:55:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:55:29,241 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2020-12-23 00:55:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:55:29,241 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 60 [2020-12-23 00:55:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:55:29,242 INFO L225 Difference]: With dead ends: 90 [2020-12-23 00:55:29,242 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 00:55:29,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 62.2s TimeCoverageRelationStatistics Valid=259, Invalid=839, Unknown=24, NotChecked=0, Total=1122 [2020-12-23 00:55:29,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 00:55:29,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2020-12-23 00:55:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 00:55:29,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-12-23 00:55:29,262 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 60 [2020-12-23 00:55:29,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:55:29,263 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-12-23 00:55:29,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:55:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-12-23 00:55:29,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:55:29,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:55:29,263 INFO L422 BasicCegarLoop]: trace histogram [24, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:55:29,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:55:29,465 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:55:29,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:55:29,465 INFO L82 PathProgramCache]: Analyzing trace with hash -957524119, now seen corresponding path program 7 times [2020-12-23 00:55:29,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:55:29,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39048209] [2020-12-23 00:55:29,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:55:29,477 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:55:29,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634192030] [2020-12-23 00:55:29,477 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 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 [2020-12-23 00:55:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:55:29,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:55:29,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:55:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 165 proven. 36 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2020-12-23 00:55:29,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39048209] [2020-12-23 00:55:29,737 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:55:29,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634192030] [2020-12-23 00:55:29,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:55:29,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 00:55:29,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745017933] [2020-12-23 00:55:29,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:55:29,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:55:29,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:55:29,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:55:29,739 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 12 states. [2020-12-23 00:55:30,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:55:30,012 INFO L93 Difference]: Finished difference Result 231 states and 278 transitions. [2020-12-23 00:55:30,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:55:30,012 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-12-23 00:55:30,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:55:30,014 INFO L225 Difference]: With dead ends: 231 [2020-12-23 00:55:30,014 INFO L226 Difference]: Without dead ends: 177 [2020-12-23 00:55:30,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:55:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-23 00:55:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 73. [2020-12-23 00:55:30,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 00:55:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2020-12-23 00:55:30,033 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 63 [2020-12-23 00:55:30,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:55:30,033 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2020-12-23 00:55:30,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:55:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2020-12-23 00:55:30,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 00:55:30,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:55:30,034 INFO L422 BasicCegarLoop]: trace histogram [27, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:55:30,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:55:30,249 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:55:30,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:55:30,249 INFO L82 PathProgramCache]: Analyzing trace with hash -836324379, now seen corresponding path program 8 times [2020-12-23 00:55:30,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:55:30,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487070933] [2020-12-23 00:55:30,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:55:30,263 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:55:30,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924584683] [2020-12-23 00:55:30,263 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 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 [2020-12-23 00:55:30,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:55:30,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:55:30,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:55:30,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:55:30,571 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 203 proven. 45 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-23 00:55:30,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487070933] [2020-12-23 00:55:30,571 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:55:30,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924584683] [2020-12-23 00:55:30,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:55:30,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 00:55:30,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729056531] [2020-12-23 00:55:30,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:55:30,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:55:30,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:55:30,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:55:30,573 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 13 states. [2020-12-23 00:55:30,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:55:30,903 INFO L93 Difference]: Finished difference Result 250 states and 301 transitions. [2020-12-23 00:55:30,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:55:30,903 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-12-23 00:55:30,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:55:30,905 INFO L225 Difference]: With dead ends: 250 [2020-12-23 00:55:30,906 INFO L226 Difference]: Without dead ends: 194 [2020-12-23 00:55:30,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:55:30,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-23 00:55:30,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 76. [2020-12-23 00:55:30,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 00:55:30,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-12-23 00:55:30,927 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 66 [2020-12-23 00:55:30,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:55:30,928 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-12-23 00:55:30,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:55:30,928 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-12-23 00:55:30,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:55:30,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:55:30,929 INFO L422 BasicCegarLoop]: trace histogram [30, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:55:31,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:55:31,141 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:55:31,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:55:31,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1177347817, now seen corresponding path program 9 times [2020-12-23 00:55:31,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:55:31,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808240672] [2020-12-23 00:55:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:55:31,154 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:55:31,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060085633] [2020-12-23 00:55:31,155 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 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 [2020-12-23 00:55:31,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:55:31,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:55:31,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:55:31,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:55:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2020-12-23 00:55:31,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808240672] [2020-12-23 00:55:31,429 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:55:31,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060085633] [2020-12-23 00:55:31,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:55:31,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:55:31,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444263675] [2020-12-23 00:55:31,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:55:31,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:55:31,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:55:31,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:55:31,432 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 6 states. [2020-12-23 00:55:31,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:55:31,520 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2020-12-23 00:55:31,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:55:31,520 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-12-23 00:55:31,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:55:31,521 INFO L225 Difference]: With dead ends: 114 [2020-12-23 00:55:31,521 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 00:55:31,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:55:31,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 00:55:31,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2020-12-23 00:55:31,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 00:55:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2020-12-23 00:55:31,542 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 69 [2020-12-23 00:55:31,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:55:31,542 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2020-12-23 00:55:31,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:55:31,543 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2020-12-23 00:55:31,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 00:55:31,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:55:31,543 INFO L422 BasicCegarLoop]: trace histogram [30, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:55:31,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 00:55:31,757 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:55:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:55:31,758 INFO L82 PathProgramCache]: Analyzing trace with hash 420018599, now seen corresponding path program 10 times [2020-12-23 00:55:31,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:55:31,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299739226] [2020-12-23 00:55:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:55:31,772 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:55:31,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715221925] [2020-12-23 00:55:31,773 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 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 [2020-12-23 00:55:31,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:55:31,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:55:31,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:55:31,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:55:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 372 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-12-23 00:55:32,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299739226] [2020-12-23 00:55:32,098 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:55:32,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715221925] [2020-12-23 00:55:32,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:55:32,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:55:32,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150427469] [2020-12-23 00:55:32,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:55:32,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:55:32,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:55:32,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:55:32,100 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand 7 states. [2020-12-23 00:55:32,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:55:32,261 INFO L93 Difference]: Finished difference Result 210 states and 244 transitions. [2020-12-23 00:55:32,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:55:32,264 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-12-23 00:55:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:55:32,266 INFO L225 Difference]: With dead ends: 210 [2020-12-23 00:55:32,266 INFO L226 Difference]: Without dead ends: 175 [2020-12-23 00:55:32,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:55:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-23 00:55:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 94. [2020-12-23 00:55:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 00:55:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2020-12-23 00:55:32,288 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 71 [2020-12-23 00:55:32,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:55:32,289 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2020-12-23 00:55:32,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:55:32,289 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2020-12-23 00:55:32,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 00:55:32,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:55:32,290 INFO L422 BasicCegarLoop]: trace histogram [40, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:55:32,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:55:32,505 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:55:32,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:55:32,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1707433302, now seen corresponding path program 11 times [2020-12-23 00:55:32,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:55:32,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155103624] [2020-12-23 00:55:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:55:32,514 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:55:32,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376693752] [2020-12-23 00:55:32,515 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 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