/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-fpi/ifeqn4f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:20:13,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:20:13,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:20:13,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:20:13,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:20:13,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:20:13,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:20:13,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:20:13,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:20:13,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:20:13,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:20:13,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:20:13,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:20:13,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:20:13,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:20:13,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:20:13,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:20:13,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:20:13,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:20:13,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:20:13,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:20:13,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:20:13,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:20:13,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:20:13,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:20:13,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:20:13,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:20:13,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:20:13,735 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 01:20:13,789 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:20:13,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:20:13,793 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:20:13,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:20:13,794 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:20:13,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:20:13,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:20:13,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:20:13,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:20:13,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:20:13,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:20:13,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:20:13,797 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:20:13,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:20:13,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:20:13,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:20:13,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:20:13,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:20:13,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:20:13,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:20:13,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:20:13,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:20:13,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:20:13,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:20:13,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:20:13,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:20:14,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:20:14,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:20:14,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:20:14,268 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:20:14,269 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:20:14,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn4f.c [2020-12-23 01:20:14,360 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd2dc6270/136edb3075c24469b1b2cbe679eb9a10/FLAGfb4058b35 [2020-12-23 01:20:15,002 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:20:15,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn4f.c [2020-12-23 01:20:15,018 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd2dc6270/136edb3075c24469b1b2cbe679eb9a10/FLAGfb4058b35 [2020-12-23 01:20:15,375 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd2dc6270/136edb3075c24469b1b2cbe679eb9a10 [2020-12-23 01:20:15,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:20:15,384 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:20:15,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:20:15,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:20:15,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:20:15,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:20:15" (1/1) ... [2020-12-23 01:20:15,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bdebaae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:20:15, skipping insertion in model container [2020-12-23 01:20:15,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:20:15" (1/1) ... [2020-12-23 01:20:15,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:20:15,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:20:15,603 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn4f.c[590,603] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],StructAccessExpression[IdentifierExpression[~a~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,],base],StructAccessExpression[IdentifierExpression[~b~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 01:20:15,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:20:15,676 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:20:15,700 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn4f.c[590,603] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],StructAccessExpression[IdentifierExpression[~a~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,],base],StructAccessExpression[IdentifierExpression[~b~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 01:20:15,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:20:15,762 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:20:15,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:20:15 WrapperNode [2020-12-23 01:20:15,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:20:15,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:20:15,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:20:15,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:20:15,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:20:15" (1/1) ... [2020-12-23 01:20:15,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:20:15" (1/1) ... [2020-12-23 01:20:15,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:20:15,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:20:15,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:20:15,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:20:15,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:20:15" (1/1) ... [2020-12-23 01:20:15,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:20:15" (1/1) ... [2020-12-23 01:20:15,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:20:15" (1/1) ... [2020-12-23 01:20:15,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:20:15" (1/1) ... [2020-12-23 01:20:15,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:20:15" (1/1) ... [2020-12-23 01:20:15,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:20:15" (1/1) ... [2020-12-23 01:20:15,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:20:15" (1/1) ... [2020-12-23 01:20:15,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:20:15,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:20:15,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:20:15,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:20:15,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:20:15" (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 01:20:16,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:20:16,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:20:16,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 01:20:16,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 01:20:16,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:20:16,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:20:16,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 01:20:16,524 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:20:16,524 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 01:20:16,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:20:16 BoogieIcfgContainer [2020-12-23 01:20:16,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:20:16,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:20:16,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:20:16,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:20:16,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:20:15" (1/3) ... [2020-12-23 01:20:16,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24cb422d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:20:16, skipping insertion in model container [2020-12-23 01:20:16,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:20:15" (2/3) ... [2020-12-23 01:20:16,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24cb422d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:20:16, skipping insertion in model container [2020-12-23 01:20:16,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:20:16" (3/3) ... [2020-12-23 01:20:16,577 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2020-12-23 01:20:16,587 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:20:16,593 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:20:16,621 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:20:16,657 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:20:16,658 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:20:16,658 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:20:16,658 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:20:16,658 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:20:16,659 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:20:16,659 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:20:16,659 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:20:16,678 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-23 01:20:16,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 01:20:16,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:20:16,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:20:16,689 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:20:16,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:20:16,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2020-12-23 01:20:16,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:20:16,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750718080] [2020-12-23 01:20:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:20:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:20:17,020 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 01:20:17,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750718080] [2020-12-23 01:20:17,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:20:17,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 01:20:17,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127927051] [2020-12-23 01:20:17,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 01:20:17,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:20:17,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 01:20:17,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:20:17,060 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-23 01:20:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:20:17,094 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2020-12-23 01:20:17,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 01:20:17,097 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-23 01:20:17,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:20:17,128 INFO L225 Difference]: With dead ends: 42 [2020-12-23 01:20:17,129 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 01:20:17,135 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 01:20:17,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 01:20:17,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 01:20:17,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 01:20:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-23 01:20:17,197 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-12-23 01:20:17,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:20:17,198 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-23 01:20:17,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 01:20:17,198 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-23 01:20:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 01:20:17,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:20:17,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:20:17,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:20:17,203 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:20:17,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:20:17,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2020-12-23 01:20:17,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:20:17,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588265923] [2020-12-23 01:20:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:20:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:20:17,394 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 01:20:17,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588265923] [2020-12-23 01:20:17,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:20:17,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 01:20:17,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201157663] [2020-12-23 01:20:17,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 01:20:17,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:20:17,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 01:20:17,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:20:17,400 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2020-12-23 01:20:17,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:20:17,499 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-12-23 01:20:17,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:20:17,502 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-23 01:20:17,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:20:17,503 INFO L225 Difference]: With dead ends: 45 [2020-12-23 01:20:17,506 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 01:20:17,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:20:17,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 01:20:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-12-23 01:20:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 01:20:17,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-23 01:20:17,521 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-12-23 01:20:17,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:20:17,521 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-23 01:20:17,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 01:20:17,521 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-23 01:20:17,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 01:20:17,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:20:17,523 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 01:20:17,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 01:20:17,524 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:20:17,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:20:17,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2020-12-23 01:20:17,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:20:17,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18311961] [2020-12-23 01:20:17,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:20:17,561 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:20:17,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600582069] [2020-12-23 01:20:17,562 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 01:20:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:20:17,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 01:20:17,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:20:17,835 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 01:20:17,837 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:20:17,841 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:20:17,842 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:20:17,843 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-23 01:20:17,912 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 01:20:17,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18311961] [2020-12-23 01:20:17,913 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:20:17,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600582069] [2020-12-23 01:20:17,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:20:17,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 01:20:17,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011749710] [2020-12-23 01:20:17,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:20:17,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:20:17,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:20:17,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:20:17,921 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 9 states. [2020-12-23 01:20:18,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:20:18,457 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-12-23 01:20:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 01:20:18,464 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-12-23 01:20:18,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:20:18,466 INFO L225 Difference]: With dead ends: 45 [2020-12-23 01:20:18,466 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 01:20:18,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:20:18,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 01:20:18,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 25. [2020-12-23 01:20:18,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 01:20:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-23 01:20:18,490 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2020-12-23 01:20:18,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:20:18,494 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-23 01:20:18,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:20:18,494 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-23 01:20:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 01:20:18,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:20:18,498 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 01:20:18,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 01:20:18,700 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:20:18,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:20:18,702 INFO L82 PathProgramCache]: Analyzing trace with hash -748772581, now seen corresponding path program 1 times [2020-12-23 01:20:18,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:20:18,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836149741] [2020-12-23 01:20:18,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:20:18,740 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:20:18,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161644960] [2020-12-23 01:20:18,741 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 01:20:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:20:18,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:20:18,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:20:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 01:20:18,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836149741] [2020-12-23 01:20:18,941 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:20:18,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161644960] [2020-12-23 01:20:18,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:20:18,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 01:20:18,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831951777] [2020-12-23 01:20:18,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:20:18,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:20:18,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:20:18,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:20:18,945 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-12-23 01:20:19,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:20:19,114 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-12-23 01:20:19,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:20:19,115 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-23 01:20:19,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:20:19,116 INFO L225 Difference]: With dead ends: 65 [2020-12-23 01:20:19,117 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 01:20:19,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:20:19,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 01:20:19,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-12-23 01:20:19,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 01:20:19,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-12-23 01:20:19,126 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-12-23 01:20:19,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:20:19,126 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-12-23 01:20:19,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:20:19,127 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-12-23 01:20:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 01:20:19,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:20:19,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:20:19,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:20:19,343 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:20:19,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:20:19,344 INFO L82 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2020-12-23 01:20:19,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:20:19,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977186961] [2020-12-23 01:20:19,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:20:19,371 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:20:19,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317338663] [2020-12-23 01:20:19,372 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 01:20:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 01:20:19,447 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 01:20:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 01:20:19,477 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 01:20:19,544 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 01:20:19,544 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 01:20:19,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:20:19,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 01:20:19 BoogieIcfgContainer [2020-12-23 01:20:19,810 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 01:20:19,811 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 01:20:19,811 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 01:20:19,811 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 01:20:19,812 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:20:16" (3/4) ... [2020-12-23 01:20:19,815 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 01:20:19,941 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-fpi/ifeqn4f.c-witness.graphml [2020-12-23 01:20:19,941 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 01:20:19,944 INFO L168 Benchmark]: Toolchain (without parser) took 4559.73 ms. Allocated memory was 152.0 MB in the beginning and 197.1 MB in the end (delta: 45.1 MB). Free memory was 127.0 MB in the beginning and 98.0 MB in the end (delta: 29.0 MB). Peak memory consumption was 74.8 MB. Max. memory is 8.0 GB. [2020-12-23 01:20:19,944 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 152.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 01:20:19,945 INFO L168 Benchmark]: CACSL2BoogieTranslator took 376.46 ms. Allocated memory is still 152.0 MB. Free memory was 126.8 MB in the beginning and 116.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 01:20:19,946 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.35 ms. Allocated memory is still 152.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 01:20:19,947 INFO L168 Benchmark]: Boogie Preprocessor took 78.03 ms. Allocated memory is still 152.0 MB. Free memory was 115.0 MB in the beginning and 113.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 01:20:19,948 INFO L168 Benchmark]: RCFGBuilder took 584.62 ms. Allocated memory is still 152.0 MB. Free memory was 113.7 MB in the beginning and 98.4 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-12-23 01:20:19,949 INFO L168 Benchmark]: TraceAbstraction took 3247.69 ms. Allocated memory was 152.0 MB in the beginning and 197.1 MB in the end (delta: 45.1 MB). Free memory was 134.3 MB in the beginning and 101.7 MB in the end (delta: 32.6 MB). Peak memory consumption was 77.6 MB. Max. memory is 8.0 GB. [2020-12-23 01:20:19,950 INFO L168 Benchmark]: Witness Printer took 130.68 ms. Allocated memory is still 197.1 MB. Free memory was 101.7 MB in the beginning and 98.0 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-23 01:20:19,957 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 152.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 376.46 ms. Allocated memory is still 152.0 MB. Free memory was 126.8 MB in the beginning and 116.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 88.35 ms. Allocated memory is still 152.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 78.03 ms. Allocated memory is still 152.0 MB. Free memory was 115.0 MB in the beginning and 113.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 584.62 ms. Allocated memory is still 152.0 MB. Free memory was 113.7 MB in the beginning and 98.4 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3247.69 ms. Allocated memory was 152.0 MB in the beginning and 197.1 MB in the end (delta: 45.1 MB). Free memory was 134.3 MB in the beginning and 101.7 MB in the end (delta: 32.6 MB). Peak memory consumption was 77.6 MB. Max. memory is 8.0 GB. * Witness Printer took 130.68 ms. Allocated memory is still 197.1 MB. Free memory was 101.7 MB in the beginning and 98.0 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [N=2] [L31] COND TRUE i