/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-patterns/array23_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:02:25,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:02:25,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:02:25,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:02:25,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:02:25,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:02:25,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:02:25,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:02:25,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:02:25,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:02:25,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:02:25,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:02:25,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:02:25,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:02:25,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:02:25,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:02:25,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:02:25,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:02:25,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:02:25,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:02:25,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:02:25,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:02:25,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:02:25,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:02:25,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:02:25,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:02:25,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:02:25,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:02:25,626 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 01:02:25,676 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:02:25,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:02:25,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:02:25,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:02:25,681 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:02:25,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:02:25,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:02:25,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:02:25,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:02:25,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:02:25,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:02:25,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:02:25,684 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:02:25,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:02:25,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:02:25,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:02:25,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:02:25,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:02:25,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:02:25,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:02:25,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:02:25,685 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:02:25,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:02:25,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:02:25,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:02:25,686 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:02:26,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:02:26,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:02:26,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:02:26,141 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:02:26,142 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:02:26,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array23_pattern.c [2020-12-23 01:02:26,225 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c81747a8b/a20ede2ecd4345deac2e7acdcb087823/FLAG83bc1e9b1 [2020-12-23 01:02:26,917 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:02:26,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-patterns/array23_pattern.c [2020-12-23 01:02:26,929 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c81747a8b/a20ede2ecd4345deac2e7acdcb087823/FLAG83bc1e9b1 [2020-12-23 01:02:27,246 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c81747a8b/a20ede2ecd4345deac2e7acdcb087823 [2020-12-23 01:02:27,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:02:27,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:02:27,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:02:27,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:02:27,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:02:27,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:02:27" (1/1) ... [2020-12-23 01:02:27,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ded6f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:27, skipping insertion in model container [2020-12-23 01:02:27,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:02:27" (1/1) ... [2020-12-23 01:02:27,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:02:27,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:02:27,436 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-patterns/array23_pattern.c[1347,1360] left hand side expression in assignment: lhs: VariableLHS[~ARR_SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~array~0,],[IdentifierExpression[~row~0,]]],[IdentifierExpression[~column~0,]]] left hand side expression in assignment: lhs: VariableLHS[~index1~0,] left hand side expression in assignment: lhs: VariableLHS[~index2~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~array~0,],[IdentifierExpression[~index1~0,]]],[IdentifierExpression[~index2~0,]]] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~array~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMINUS,IdentifierExpression[~ARR_SIZE~0,GLOBAL],IntegerLiteral[1]],IdentifierExpression[~index1~0,]]]],[IdentifierExpression[~index2~0,]]] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] [2020-12-23 01:02:27,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:02:27,473 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:02:27,488 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-patterns/array23_pattern.c[1347,1360] left hand side expression in assignment: lhs: VariableLHS[~ARR_SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~row~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~ARR_SIZE~0,GLOBAL]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~column~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~index1~0,] left hand side expression in assignment: lhs: VariableLHS[~index2~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~index1~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~ARR_SIZE~0,GLOBAL]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~index2~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,],offset],BinaryExpression[ARITHMUL,BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMINUS,IdentifierExpression[~ARR_SIZE~0,GLOBAL],IntegerLiteral[1]],IdentifierExpression[~index1~0,]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~ARR_SIZE~0,GLOBAL]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~index2~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] [2020-12-23 01:02:27,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:02:27,519 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:02:27,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:27 WrapperNode [2020-12-23 01:02:27,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:02:27,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:02:27,521 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:02:27,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:02:27,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:27" (1/1) ... [2020-12-23 01:02:27,539 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:27" (1/1) ... [2020-12-23 01:02:27,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:02:27,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:02:27,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:02:27,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:02:27,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:27" (1/1) ... [2020-12-23 01:02:27,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:27" (1/1) ... [2020-12-23 01:02:27,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:27" (1/1) ... [2020-12-23 01:02:27,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:27" (1/1) ... [2020-12-23 01:02:27,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:27" (1/1) ... [2020-12-23 01:02:27,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:27" (1/1) ... [2020-12-23 01:02:27,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:27" (1/1) ... [2020-12-23 01:02:27,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:02:27,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:02:27,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:02:27,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:02:27,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:27" (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 01:02:27,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:02:27,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:02:27,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 01:02:27,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:02:27,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:02:27,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 01:02:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 01:02:28,193 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:02:28,194 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-23 01:02:28,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:02:28 BoogieIcfgContainer [2020-12-23 01:02:28,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:02:28,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:02:28,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:02:28,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:02:28,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:02:27" (1/3) ... [2020-12-23 01:02:28,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d26170a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:02:28, skipping insertion in model container [2020-12-23 01:02:28,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:02:27" (2/3) ... [2020-12-23 01:02:28,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d26170a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:02:28, skipping insertion in model container [2020-12-23 01:02:28,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:02:28" (3/3) ... [2020-12-23 01:02:28,206 INFO L111 eAbstractionObserver]: Analyzing ICFG array23_pattern.c [2020-12-23 01:02:28,214 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:02:28,218 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:02:28,244 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:02:28,275 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:02:28,275 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:02:28,275 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:02:28,276 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:02:28,276 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:02:28,276 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:02:28,276 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:02:28,276 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:02:28,293 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-12-23 01:02:28,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 01:02:28,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:02:28,301 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:02:28,302 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:02:28,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:02:28,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1748886715, now seen corresponding path program 1 times [2020-12-23 01:02:28,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:02:28,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360547428] [2020-12-23 01:02:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:02:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:02:28,502 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 01:02:28,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360547428] [2020-12-23 01:02:28,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:02:28,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 01:02:28,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376652797] [2020-12-23 01:02:28,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 01:02:28,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:02:28,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 01:02:28,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:02:28,530 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-12-23 01:02:28,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:02:28,558 INFO L93 Difference]: Finished difference Result 67 states and 102 transitions. [2020-12-23 01:02:28,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 01:02:28,560 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 01:02:28,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:02:28,587 INFO L225 Difference]: With dead ends: 67 [2020-12-23 01:02:28,587 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 01:02:28,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:02:28,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 01:02:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-23 01:02:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 01:02:28,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-12-23 01:02:28,642 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 11 [2020-12-23 01:02:28,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:02:28,642 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-12-23 01:02:28,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 01:02:28,642 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-12-23 01:02:28,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 01:02:28,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:02:28,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:02:28,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:02:28,646 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:02:28,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:02:28,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1811974448, now seen corresponding path program 1 times [2020-12-23 01:02:28,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:02:28,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095994182] [2020-12-23 01:02:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:02:28,698 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:02:28,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983113226] [2020-12-23 01:02:28,699 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 01:02:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:02:28,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 01:02:28,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:02:29,100 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 01:02:29,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095994182] [2020-12-23 01:02:29,101 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:02:29,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983113226] [2020-12-23 01:02:29,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:02:29,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 01:02:29,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746697621] [2020-12-23 01:02:29,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 01:02:29,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:02:29,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 01:02:29,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:02:29,105 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 5 states. [2020-12-23 01:02:29,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:02:29,316 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2020-12-23 01:02:29,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:02:29,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-12-23 01:02:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:02:29,318 INFO L225 Difference]: With dead ends: 63 [2020-12-23 01:02:29,318 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 01:02:29,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:02:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 01:02:29,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-12-23 01:02:29,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 01:02:29,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-12-23 01:02:29,327 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 24 [2020-12-23 01:02:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:02:29,327 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-12-23 01:02:29,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 01:02:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-12-23 01:02:29,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 01:02:29,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:02:29,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:02:29,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 01:02:29,544 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:02:29,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:02:29,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1100083622, now seen corresponding path program 1 times [2020-12-23 01:02:29,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:02:29,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047967069] [2020-12-23 01:02:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:02:29,562 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:02:29,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277593165] [2020-12-23 01:02:29,563 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 01:02:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:02:29,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 01:02:29,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:02:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 01:02:29,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047967069] [2020-12-23 01:02:29,741 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:02:29,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277593165] [2020-12-23 01:02:29,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:02:29,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 01:02:29,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253112713] [2020-12-23 01:02:29,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 01:02:29,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:02:29,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 01:02:29,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:02:29,751 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 4 states. [2020-12-23 01:02:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:02:29,850 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-12-23 01:02:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:02:29,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-12-23 01:02:29,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:02:29,852 INFO L225 Difference]: With dead ends: 65 [2020-12-23 01:02:29,853 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 01:02:29,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:02:29,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 01:02:29,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-12-23 01:02:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 01:02:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-12-23 01:02:29,872 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 30 [2020-12-23 01:02:29,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:02:29,872 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-12-23 01:02:29,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 01:02:29,873 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-12-23 01:02:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 01:02:29,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:02:29,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:02:30,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:30,089 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:02:30,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:02:30,090 INFO L82 PathProgramCache]: Analyzing trace with hash 418919962, now seen corresponding path program 1 times [2020-12-23 01:02:30,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:02:30,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251579057] [2020-12-23 01:02:30,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:02:30,106 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:02:30,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270151126] [2020-12-23 01:02:30,106 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 01:02:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:02:30,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:02:30,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:02:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 01:02:30,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251579057] [2020-12-23 01:02:30,279 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:02:30,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270151126] [2020-12-23 01:02:30,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:02:30,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 01:02:30,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949106990] [2020-12-23 01:02:30,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 01:02:30,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:02:30,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 01:02:30,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:02:30,281 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 6 states. [2020-12-23 01:02:30,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:02:30,438 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2020-12-23 01:02:30,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:02:30,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-12-23 01:02:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:02:30,440 INFO L225 Difference]: With dead ends: 72 [2020-12-23 01:02:30,440 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 01:02:30,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:02:30,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 01:02:30,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-12-23 01:02:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 01:02:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-12-23 01:02:30,447 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 34 [2020-12-23 01:02:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:02:30,448 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-12-23 01:02:30,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 01:02:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-12-23 01:02:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 01:02:30,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:02:30,449 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:02:30,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:02:30,663 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:02:30,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:02:30,664 INFO L82 PathProgramCache]: Analyzing trace with hash 842854106, now seen corresponding path program 2 times [2020-12-23 01:02:30,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:02:30,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192630951] [2020-12-23 01:02:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:02:30,681 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:02:30,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668905557] [2020-12-23 01:02:30,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true