/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/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:12:21,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:12:21,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:12:22,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:12:22,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:12:22,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:12:22,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:12:22,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:12:22,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:12:22,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:12:22,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:12:22,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:12:22,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:12:22,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:12:22,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:12:22,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:12:22,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:12:22,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:12:22,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:12:22,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:12:22,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:12:22,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:12:22,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:12:22,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:12:22,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:12:22,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:12:22,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:12:22,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:12:22,119 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:12:22,162 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:12:22,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:12:22,167 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:12:22,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:12:22,168 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:12:22,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:12:22,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:12:22,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:12:22,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:12:22,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:12:22,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:12:22,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:12:22,171 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:12:22,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:12:22,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:12:22,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:12:22,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:12:22,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:12:22,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:12:22,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:12:22,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:12:22,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:12:22,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:12:22,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:12:22,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:12:22,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:12:22,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:12:22,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:12:22,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:12:22,670 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:12:22,671 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:12:22,672 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test24-2.c [2021-01-06 16:12:22,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0e4bcc1df/b93448b4a3c04500ac215246d99e21b9/FLAG2c6849956 [2021-01-06 16:12:23,343 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:12:23,344 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test24-2.c [2021-01-06 16:12:23,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0e4bcc1df/b93448b4a3c04500ac215246d99e21b9/FLAG2c6849956 [2021-01-06 16:12:23,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0e4bcc1df/b93448b4a3c04500ac215246d99e21b9 [2021-01-06 16:12:23,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:12:23,731 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:12:23,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:12:23,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:12:23,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:12:23,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:12:23" (1/1) ... [2021-01-06 16:12:23,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@362a0d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:23, skipping insertion in model container [2021-01-06 16:12:23,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:12:23" (1/1) ... [2021-01-06 16:12:23,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:12:23,788 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~ad1~0,],[IdentifierExpression[~j~0,]]],a] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~ad1~0,],[IdentifierExpression[~j~0,]]],b] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ad2~0,] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~ad1~0,],[IdentifierExpression[~i~0,]]],a] left hand side expression in assignment: lhs: VariableLHS[~pa~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:12:24,023 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/ldv-regression/test24-2.c[807,820] [2021-01-06 16:12:24,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:12:24,035 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#ad1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#ad1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#ad1~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#ad1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~j~0,]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ad2~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#ad1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#ad1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~pa~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:12:24,057 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/ldv-regression/test24-2.c[807,820] [2021-01-06 16:12:24,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:12:24,075 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:12:24,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:24 WrapperNode [2021-01-06 16:12:24,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:12:24,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:12:24,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:12:24,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:12:24,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:24" (1/1) ... [2021-01-06 16:12:24,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:24" (1/1) ... [2021-01-06 16:12:24,118 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:12:24,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:12:24,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:12:24,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:12:24,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:24" (1/1) ... [2021-01-06 16:12:24,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:24" (1/1) ... [2021-01-06 16:12:24,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:24" (1/1) ... [2021-01-06 16:12:24,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:24" (1/1) ... [2021-01-06 16:12:24,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:24" (1/1) ... [2021-01-06 16:12:24,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:24" (1/1) ... [2021-01-06 16:12:24,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:24" (1/1) ... [2021-01-06 16:12:24,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:12:24,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:12:24,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:12:24,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:12:24,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:12:24,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:12:24,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:12:24,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:12:24,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:12:24,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:12:24,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:12:24,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:12:24,524 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:12:24,524 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 16:12:24,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:24 BoogieIcfgContainer [2021-01-06 16:12:24,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:12:24,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:12:24,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:12:24,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:12:24,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:12:23" (1/3) ... [2021-01-06 16:12:24,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b92c308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:12:24, skipping insertion in model container [2021-01-06 16:12:24,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:24" (2/3) ... [2021-01-06 16:12:24,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b92c308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:12:24, skipping insertion in model container [2021-01-06 16:12:24,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:24" (3/3) ... [2021-01-06 16:12:24,536 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-2.c [2021-01-06 16:12:24,543 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:12:24,549 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:12:24,572 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:12:24,628 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:12:24,629 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:12:24,629 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:12:24,629 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:12:24,629 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:12:24,629 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:12:24,630 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:12:24,630 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:12:24,653 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-01-06 16:12:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:12:24,658 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:24,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:24,660 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:24,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:24,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1829445793, now seen corresponding path program 1 times [2021-01-06 16:12:24,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:24,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888040837] [2021-01-06 16:12:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:24,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888040837] [2021-01-06 16:12:24,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:24,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:12:24,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628152534] [2021-01-06 16:12:25,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:12:25,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:25,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:12:25,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:12:25,046 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2021-01-06 16:12:25,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:25,071 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2021-01-06 16:12:25,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:12:25,075 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-01-06 16:12:25,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:25,087 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:12:25,087 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 16:12:25,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:12:25,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 16:12:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 16:12:25,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:12:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-01-06 16:12:25,135 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2021-01-06 16:12:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:25,136 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-01-06 16:12:25,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:12:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-01-06 16:12:25,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:12:25,138 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:25,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:25,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:12:25,141 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:25,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:25,146 INFO L82 PathProgramCache]: Analyzing trace with hash 672236885, now seen corresponding path program 1 times [2021-01-06 16:12:25,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:25,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581460345] [2021-01-06 16:12:25,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:25,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581460345] [2021-01-06 16:12:25,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:25,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:12:25,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963892697] [2021-01-06 16:12:25,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:12:25,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:25,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:12:25,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:12:25,289 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2021-01-06 16:12:25,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:25,326 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-01-06 16:12:25,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:12:25,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-01-06 16:12:25,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:25,328 INFO L225 Difference]: With dead ends: 24 [2021-01-06 16:12:25,328 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 16:12:25,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:12:25,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 16:12:25,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-01-06 16:12:25,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:12:25,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-01-06 16:12:25,339 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-01-06 16:12:25,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:25,340 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-01-06 16:12:25,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:12:25,341 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-01-06 16:12:25,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:12:25,341 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:25,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:25,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:12:25,343 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:25,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:25,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1835948819, now seen corresponding path program 1 times [2021-01-06 16:12:25,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:25,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620069331] [2021-01-06 16:12:25,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:25,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620069331] [2021-01-06 16:12:25,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417699710] [2021-01-06 16:12:25,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:25,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 16:12:25,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:25,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:25,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:12:25,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884489833] [2021-01-06 16:12:25,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:12:25,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:25,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:12:25,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:12:25,610 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2021-01-06 16:12:25,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:25,632 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-01-06 16:12:25,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:12:25,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-01-06 16:12:25,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:25,634 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:12:25,634 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 16:12:25,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:12:25,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 16:12:25,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-01-06 16:12:25,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 16:12:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-01-06 16:12:25,640 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2021-01-06 16:12:25,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:25,640 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-01-06 16:12:25,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:12:25,641 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-01-06 16:12:25,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:12:25,641 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:25,642 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:25,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:12:25,857 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:25,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:25,858 INFO L82 PathProgramCache]: Analyzing trace with hash -823346863, now seen corresponding path program 2 times [2021-01-06 16:12:25,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:25,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544079514] [2021-01-06 16:12:25,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:25,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544079514] [2021-01-06 16:12:25,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969899108] [2021-01-06 16:12:25,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:26,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:12:26,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:26,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:12:26,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:26,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:26,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:12:26,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899837084] [2021-01-06 16:12:26,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:12:26,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:26,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:12:26,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:12:26,106 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2021-01-06 16:12:26,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:26,145 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-01-06 16:12:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:12:26,146 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-06 16:12:26,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:26,148 INFO L225 Difference]: With dead ends: 28 [2021-01-06 16:12:26,148 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 16:12:26,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:12:26,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 16:12:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-01-06 16:12:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 16:12:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-01-06 16:12:26,160 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2021-01-06 16:12:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:26,160 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-01-06 16:12:26,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:12:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-01-06 16:12:26,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 16:12:26,163 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:26,163 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:26,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:26,377 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:26,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:26,378 INFO L82 PathProgramCache]: Analyzing trace with hash -900956145, now seen corresponding path program 3 times [2021-01-06 16:12:26,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:26,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641495643] [2021-01-06 16:12:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:26,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641495643] [2021-01-06 16:12:26,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672402767] [2021-01-06 16:12:26,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:26,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:12:26,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:26,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:12:26,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:26,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:26,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:12:26,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78670678] [2021-01-06 16:12:26,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:12:26,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:26,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:12:26,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:12:26,574 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2021-01-06 16:12:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:26,599 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-01-06 16:12:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:12:26,600 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2021-01-06 16:12:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:26,601 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:12:26,601 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 16:12:26,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:12:26,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 16:12:26,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-01-06 16:12:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 16:12:26,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-01-06 16:12:26,610 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2021-01-06 16:12:26,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:26,611 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-01-06 16:12:26,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:12:26,611 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-01-06 16:12:26,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:12:26,612 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:26,612 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:26,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:26,828 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:26,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:26,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1825935181, now seen corresponding path program 4 times [2021-01-06 16:12:26,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:26,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466484342] [2021-01-06 16:12:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:26,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466484342] [2021-01-06 16:12:26,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064817587] [2021-01-06 16:12:26,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:27,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:12:27,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:27,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:12:27,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:27,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:27,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 16:12:27,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968854100] [2021-01-06 16:12:27,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:12:27,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:27,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:12:27,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:12:27,069 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2021-01-06 16:12:27,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:27,097 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-01-06 16:12:27,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:12:27,097 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2021-01-06 16:12:27,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:27,098 INFO L225 Difference]: With dead ends: 32 [2021-01-06 16:12:27,098 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 16:12:27,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:12:27,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 16:12:27,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-01-06 16:12:27,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 16:12:27,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-01-06 16:12:27,103 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2021-01-06 16:12:27,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:27,104 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-01-06 16:12:27,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:12:27,104 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-01-06 16:12:27,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:12:27,104 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:27,105 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:27,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:27,319 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:27,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:27,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1856518389, now seen corresponding path program 5 times [2021-01-06 16:12:27,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:27,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700381945] [2021-01-06 16:12:27,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:27,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700381945] [2021-01-06 16:12:27,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840027289] [2021-01-06 16:12:27,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:27,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:12:27,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:27,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:12:27,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:27,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:27,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:12:27,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112011215] [2021-01-06 16:12:27,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:12:27,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:27,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:12:27,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:12:27,587 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2021-01-06 16:12:27,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:27,627 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-01-06 16:12:27,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:12:27,628 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2021-01-06 16:12:27,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:27,629 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:12:27,629 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 16:12:27,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:12:27,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 16:12:27,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-01-06 16:12:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 16:12:27,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-01-06 16:12:27,644 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2021-01-06 16:12:27,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:27,644 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-01-06 16:12:27,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:12:27,644 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-01-06 16:12:27,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:12:27,646 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:27,646 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:27,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:12:27,861 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:27,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:27,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1641347255, now seen corresponding path program 6 times [2021-01-06 16:12:27,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:27,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232090433] [2021-01-06 16:12:27,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:27,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232090433] [2021-01-06 16:12:27,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390680098] [2021-01-06 16:12:27,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:28,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:12:28,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:28,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:12:28,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:28,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:28,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:12:28,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764920625] [2021-01-06 16:12:28,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:12:28,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:28,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:12:28,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:12:28,209 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2021-01-06 16:12:28,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:28,245 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-01-06 16:12:28,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:12:28,245 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2021-01-06 16:12:28,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:28,246 INFO L225 Difference]: With dead ends: 36 [2021-01-06 16:12:28,246 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:12:28,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:12:28,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:12:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-01-06 16:12:28,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 16:12:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-01-06 16:12:28,251 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2021-01-06 16:12:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:28,251 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-01-06 16:12:28,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:12:28,251 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-01-06 16:12:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 16:12:28,252 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:28,252 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:28,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:28,467 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:28,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:28,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1020317689, now seen corresponding path program 7 times [2021-01-06 16:12:28,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:28,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478211210] [2021-01-06 16:12:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:28,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478211210] [2021-01-06 16:12:28,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124393397] [2021-01-06 16:12:28,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:28,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:12:28,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:28,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:28,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:12:28,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043688543] [2021-01-06 16:12:28,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:12:28,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:28,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:12:28,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:12:28,769 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2021-01-06 16:12:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:28,812 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-01-06 16:12:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:12:28,813 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2021-01-06 16:12:28,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:28,813 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:12:28,814 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 16:12:28,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:12:28,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 16:12:28,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-01-06 16:12:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 16:12:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-01-06 16:12:28,818 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2021-01-06 16:12:28,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:28,818 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-01-06 16:12:28,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:12:28,818 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-01-06 16:12:28,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:12:28,819 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:28,819 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:29,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:29,033 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:29,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:29,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1211358907, now seen corresponding path program 8 times [2021-01-06 16:12:29,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:29,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273000660] [2021-01-06 16:12:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:29,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273000660] [2021-01-06 16:12:29,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80170540] [2021-01-06 16:12:29,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:29,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:12:29,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:29,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:12:29,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:29,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:29,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:12:29,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419948468] [2021-01-06 16:12:29,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:12:29,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:29,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:12:29,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:12:29,269 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2021-01-06 16:12:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:29,318 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-01-06 16:12:29,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:12:29,318 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2021-01-06 16:12:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:29,319 INFO L225 Difference]: With dead ends: 40 [2021-01-06 16:12:29,319 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 16:12:29,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:12:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 16:12:29,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-01-06 16:12:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 16:12:29,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-01-06 16:12:29,323 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2021-01-06 16:12:29,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:29,324 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-01-06 16:12:29,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:12:29,324 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-01-06 16:12:29,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 16:12:29,325 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:29,325 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:29,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:12:29,533 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:29,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:29,534 INFO L82 PathProgramCache]: Analyzing trace with hash -118375677, now seen corresponding path program 9 times [2021-01-06 16:12:29,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:29,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942233737] [2021-01-06 16:12:29,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:29,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942233737] [2021-01-06 16:12:29,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376956422] [2021-01-06 16:12:29,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:29,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:12:29,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:29,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:12:29,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:30,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:30,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:12:30,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702052740] [2021-01-06 16:12:30,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:12:30,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:30,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:12:30,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:12:30,020 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2021-01-06 16:12:30,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:30,078 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-01-06 16:12:30,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:12:30,079 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2021-01-06 16:12:30,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:30,079 INFO L225 Difference]: With dead ends: 42 [2021-01-06 16:12:30,079 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 16:12:30,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:12:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 16:12:30,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-01-06 16:12:30,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 16:12:30,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-01-06 16:12:30,084 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2021-01-06 16:12:30,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:30,084 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-01-06 16:12:30,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:12:30,084 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-01-06 16:12:30,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:12:30,085 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:30,085 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:30,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:30,295 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:30,296 INFO L82 PathProgramCache]: Analyzing trace with hash -2028479167, now seen corresponding path program 10 times [2021-01-06 16:12:30,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:30,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560521115] [2021-01-06 16:12:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:30,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560521115] [2021-01-06 16:12:30,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412697581] [2021-01-06 16:12:30,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:30,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:12:30,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:30,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:12:30,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:30,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:30,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:12:30,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541007311] [2021-01-06 16:12:30,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:12:30,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:30,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:12:30,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:12:30,568 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2021-01-06 16:12:30,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:30,622 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-01-06 16:12:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:12:30,623 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2021-01-06 16:12:30,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:30,623 INFO L225 Difference]: With dead ends: 44 [2021-01-06 16:12:30,623 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 16:12:30,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:12:30,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 16:12:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-01-06 16:12:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 16:12:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-01-06 16:12:30,628 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2021-01-06 16:12:30,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:30,629 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-01-06 16:12:30,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:12:30,629 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-01-06 16:12:30,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 16:12:30,630 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:30,630 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:30,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:30,844 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:30,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:30,845 INFO L82 PathProgramCache]: Analyzing trace with hash 608069631, now seen corresponding path program 11 times [2021-01-06 16:12:30,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:30,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976004032] [2021-01-06 16:12:30,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:31,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976004032] [2021-01-06 16:12:31,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542462896] [2021-01-06 16:12:31,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:31,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 16:12:31,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:31,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:12:31,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:31,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:31,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:12:31,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497652313] [2021-01-06 16:12:31,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:12:31,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:31,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:12:31,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:12:31,438 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 15 states. [2021-01-06 16:12:31,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:31,510 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-01-06 16:12:31,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:12:31,511 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2021-01-06 16:12:31,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:31,511 INFO L225 Difference]: With dead ends: 46 [2021-01-06 16:12:31,512 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 16:12:31,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:12:31,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 16:12:31,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-01-06 16:12:31,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 16:12:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-01-06 16:12:31,516 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2021-01-06 16:12:31,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:31,517 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-01-06 16:12:31,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:12:31,517 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-01-06 16:12:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:12:31,518 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:31,518 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:31,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:12:31,733 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:31,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:31,734 INFO L82 PathProgramCache]: Analyzing trace with hash 300759869, now seen corresponding path program 12 times [2021-01-06 16:12:31,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:31,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920840478] [2021-01-06 16:12:31,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:31,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920840478] [2021-01-06 16:12:31,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280833503] [2021-01-06 16:12:31,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:33,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 16:12:33,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:33,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:12:33,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:33,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:33,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:12:33,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648844993] [2021-01-06 16:12:33,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:12:33,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:33,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:12:33,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:12:33,314 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 16 states. [2021-01-06 16:12:33,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:33,374 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-01-06 16:12:33,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:12:33,374 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2021-01-06 16:12:33,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:33,375 INFO L225 Difference]: With dead ends: 48 [2021-01-06 16:12:33,375 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 16:12:33,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:12:33,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 16:12:33,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-01-06 16:12:33,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 16:12:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-01-06 16:12:33,380 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2021-01-06 16:12:33,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:33,380 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-01-06 16:12:33,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:12:33,381 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-01-06 16:12:33,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 16:12:33,381 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:33,381 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:33,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:12:33,596 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:33,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1328822011, now seen corresponding path program 13 times [2021-01-06 16:12:33,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:33,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008638226] [2021-01-06 16:12:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:33,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008638226] [2021-01-06 16:12:33,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047878802] [2021-01-06 16:12:33,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:33,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:12:33,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:34,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:34,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:12:34,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216560364] [2021-01-06 16:12:34,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:12:34,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:34,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:12:34,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:12:34,005 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2021-01-06 16:12:34,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:34,070 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-01-06 16:12:34,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:12:34,070 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2021-01-06 16:12:34,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:34,075 INFO L225 Difference]: With dead ends: 50 [2021-01-06 16:12:34,075 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 16:12:34,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:12:34,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 16:12:34,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-01-06 16:12:34,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 16:12:34,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-01-06 16:12:34,098 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2021-01-06 16:12:34,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:34,100 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-01-06 16:12:34,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:12:34,100 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-01-06 16:12:34,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:12:34,101 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:34,101 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:34,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:12:34,302 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:34,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:34,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1454062393, now seen corresponding path program 14 times [2021-01-06 16:12:34,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:34,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277731058] [2021-01-06 16:12:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:34,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277731058] [2021-01-06 16:12:34,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440722880] [2021-01-06 16:12:34,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:34,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:12:34,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:34,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:12:34,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:34,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:34,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:12:34,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110891043] [2021-01-06 16:12:34,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:12:34,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:34,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:12:34,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:12:34,653 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2021-01-06 16:12:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:34,728 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-01-06 16:12:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:12:34,729 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2021-01-06 16:12:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:34,731 INFO L225 Difference]: With dead ends: 52 [2021-01-06 16:12:34,731 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 16:12:34,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:12:34,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 16:12:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-01-06 16:12:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 16:12:34,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-01-06 16:12:34,737 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2021-01-06 16:12:34,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:34,739 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-01-06 16:12:34,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:12:34,739 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-01-06 16:12:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 16:12:34,742 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:34,742 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:34,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:34,956 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:34,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1550985207, now seen corresponding path program 15 times [2021-01-06 16:12:34,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:34,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997539803] [2021-01-06 16:12:34,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:35,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997539803] [2021-01-06 16:12:35,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049533606] [2021-01-06 16:12:35,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:37,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 16:12:37,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:37,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:12:37,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:37,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:37,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:12:37,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421509138] [2021-01-06 16:12:37,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:12:37,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:37,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:12:37,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:12:37,430 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 19 states. [2021-01-06 16:12:37,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:37,508 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-01-06 16:12:37,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:12:37,508 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2021-01-06 16:12:37,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:37,509 INFO L225 Difference]: With dead ends: 54 [2021-01-06 16:12:37,509 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 16:12:37,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:12:37,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 16:12:37,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-01-06 16:12:37,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 16:12:37,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-01-06 16:12:37,514 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2021-01-06 16:12:37,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:37,514 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-01-06 16:12:37,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:12:37,514 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-01-06 16:12:37,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 16:12:37,515 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:37,515 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:37,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:12:37,729 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:37,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:37,730 INFO L82 PathProgramCache]: Analyzing trace with hash 204528949, now seen corresponding path program 16 times [2021-01-06 16:12:37,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:37,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440007003] [2021-01-06 16:12:37,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:38,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440007003] [2021-01-06 16:12:38,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23716610] [2021-01-06 16:12:38,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:38,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:12:38,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:38,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:12:38,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:38,263 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:38,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:38,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:12:38,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547573345] [2021-01-06 16:12:38,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:12:38,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:38,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:12:38,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:12:38,266 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2021-01-06 16:12:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:38,337 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-01-06 16:12:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:12:38,338 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2021-01-06 16:12:38,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:38,338 INFO L225 Difference]: With dead ends: 56 [2021-01-06 16:12:38,339 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 16:12:38,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:12:38,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 16:12:38,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-01-06 16:12:38,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 16:12:38,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-01-06 16:12:38,354 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2021-01-06 16:12:38,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:38,355 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-01-06 16:12:38,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:12:38,355 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-01-06 16:12:38,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 16:12:38,355 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:38,356 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:38,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:12:38,564 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:38,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:38,564 INFO L82 PathProgramCache]: Analyzing trace with hash -954778893, now seen corresponding path program 17 times [2021-01-06 16:12:38,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:38,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879343778] [2021-01-06 16:12:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:38,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879343778] [2021-01-06 16:12:38,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984906932] [2021-01-06 16:12:38,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:40,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 16:12:40,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:40,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:12:40,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:41,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:41,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 16:12:41,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026811134] [2021-01-06 16:12:41,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:12:41,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:41,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:12:41,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:12:41,047 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 21 states. [2021-01-06 16:12:41,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:41,123 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-01-06 16:12:41,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:12:41,124 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2021-01-06 16:12:41,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:41,124 INFO L225 Difference]: With dead ends: 58 [2021-01-06 16:12:41,124 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 16:12:41,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:12:41,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 16:12:41,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-01-06 16:12:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 16:12:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-01-06 16:12:41,129 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2021-01-06 16:12:41,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:41,129 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-01-06 16:12:41,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:12:41,129 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-01-06 16:12:41,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:12:41,130 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:41,130 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:41,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:41,346 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:41,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:41,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1641881905, now seen corresponding path program 18 times [2021-01-06 16:12:41,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:41,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605668743] [2021-01-06 16:12:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:41,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605668743] [2021-01-06 16:12:41,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386738598] [2021-01-06 16:12:41,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:47,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 16:12:47,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:12:47,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:12:47,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:47,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:47,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 16:12:47,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206043615] [2021-01-06 16:12:47,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:12:47,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:47,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:12:47,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:12:47,829 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 22 states. [2021-01-06 16:12:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:47,901 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-01-06 16:12:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:12:47,902 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2021-01-06 16:12:47,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:47,902 INFO L225 Difference]: With dead ends: 60 [2021-01-06 16:12:47,903 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 16:12:47,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:12:47,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 16:12:47,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-01-06 16:12:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 16:12:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-01-06 16:12:47,906 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2021-01-06 16:12:47,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:47,907 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-01-06 16:12:47,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:12:47,907 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-01-06 16:12:47,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 16:12:47,907 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:47,908 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:48,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:48,122 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:48,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:48,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1656909807, now seen corresponding path program 19 times [2021-01-06 16:12:48,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:48,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536810450] [2021-01-06 16:12:48,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:48,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536810450] [2021-01-06 16:12:48,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475475904] [2021-01-06 16:12:48,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:48,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:12:48,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:48,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:48,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:12:48,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589070540] [2021-01-06 16:12:48,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:12:48,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:48,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:12:48,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:12:48,642 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 23 states. [2021-01-06 16:12:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:48,714 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-01-06 16:12:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:12:48,714 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2021-01-06 16:12:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:48,715 INFO L225 Difference]: With dead ends: 61 [2021-01-06 16:12:48,715 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 16:12:48,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:12:48,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 16:12:48,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-01-06 16:12:48,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 16:12:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-01-06 16:12:48,719 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2021-01-06 16:12:48,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:48,719 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-01-06 16:12:48,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:12:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-01-06 16:12:48,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 16:12:48,720 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:48,720 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:48,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:48,935 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:48,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:48,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1081145555, now seen corresponding path program 20 times [2021-01-06 16:12:48,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:48,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272336482] [2021-01-06 16:12:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:12:49,064 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:12:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:12:49,168 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:12:49,204 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:12:49,204 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:12:49,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-01-06 16:12:49,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:12:49 BoogieIcfgContainer [2021-01-06 16:12:49,266 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:12:49,267 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:12:49,267 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:12:49,267 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:12:49,268 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:24" (3/4) ... [2021-01-06 16:12:49,270 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 16:12:49,342 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/test24-2.c-witness.graphml [2021-01-06 16:12:49,342 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:12:49,344 INFO L168 Benchmark]: Toolchain (without parser) took 25613.02 ms. Allocated memory was 156.2 MB in the beginning and 225.4 MB in the end (delta: 69.2 MB). Free memory was 131.9 MB in the beginning and 124.3 MB in the end (delta: 7.6 MB). Peak memory consumption was 78.3 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:49,344 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 156.2 MB. Free memory is still 134.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:12:49,345 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.88 ms. Allocated memory is still 156.2 MB. Free memory was 131.5 MB in the beginning and 121.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:49,345 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.02 ms. Allocated memory is still 156.2 MB. Free memory was 121.5 MB in the beginning and 120.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:49,346 INFO L168 Benchmark]: Boogie Preprocessor took 30.42 ms. Allocated memory is still 156.2 MB. Free memory was 120.2 MB in the beginning and 118.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:49,346 INFO L168 Benchmark]: RCFGBuilder took 376.42 ms. Allocated memory is still 156.2 MB. Free memory was 118.9 MB in the beginning and 104.8 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:49,347 INFO L168 Benchmark]: TraceAbstraction took 24737.93 ms. Allocated memory was 156.2 MB in the beginning and 225.4 MB in the end (delta: 69.2 MB). Free memory was 104.4 MB in the beginning and 129.0 MB in the end (delta: -24.6 MB). Peak memory consumption was 44.8 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:49,347 INFO L168 Benchmark]: Witness Printer took 75.38 ms. Allocated memory is still 225.4 MB. Free memory was 129.0 MB in the beginning and 124.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:49,350 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 156.2 MB. Free memory is still 134.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 340.88 ms. Allocated memory is still 156.2 MB. Free memory was 131.5 MB in the beginning and 121.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.02 ms. Allocated memory is still 156.2 MB. Free memory was 121.5 MB in the beginning and 120.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.42 ms. Allocated memory is still 156.2 MB. Free memory was 120.2 MB in the beginning and 118.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 376.42 ms. Allocated memory is still 156.2 MB. Free memory was 118.9 MB in the beginning and 104.8 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 24737.93 ms. Allocated memory was 156.2 MB in the beginning and 225.4 MB in the end (delta: 69.2 MB). Free memory was 104.4 MB in the beginning and 129.0 MB in the end (delta: -24.6 MB). Peak memory consumption was 44.8 MB. Max. memory is 8.0 GB. * Witness Printer took 75.38 ms. Allocated memory is still 225.4 MB. Free memory was 129.0 MB in the beginning and 124.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] struct dummy ad1[20], *ad2; [L18] int i, j, *pa; [L19] j=0 [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND FALSE !(j<20) [L23] i = __VERIFIER_nondet_int() [L24] COND TRUE i >= 0 && i < 10 [L25] ad2 = ad1 [L26] ad1[i].a = i [L27] pa = &ad1[i].a [L28] EXPR ad2[i].a [L28] i = ad2[i].a + 10 [L29] EXPR \read(*pa) [L29] COND FALSE !(i < *pa) [L12] EXPR ad1[b].a [L12] return ad1[b].a == b; [L32] COND TRUE !check(ad1, i) [L39] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 24.6s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 210 SDslu, 1430 SDs, 0 SdLazy, 618 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 13.0s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 1250 NumberOfCodeBlocks, 1250 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1159 ConstructedInterpolants, 0 QuantifiedInterpolants, 95961 SizeOfPredicates, 0 NumberOfNonLiveVariables, 3097 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...