/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-programs/copysome1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:38:49,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:38:49,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:38:49,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:38:49,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:38:49,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:38:49,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:38:49,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:38:49,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:38:49,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:38:49,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:38:49,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:38:49,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:38:49,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:38:49,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:38:49,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:38:49,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:38:49,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:38:49,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:38:49,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:38:49,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:38:49,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:38:49,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:38:49,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:38:49,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:38:49,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:38:49,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:38:49,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:38:49,423 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:38:49,452 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:38:49,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:38:49,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:38:49,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:38:49,455 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:38:49,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:38:49,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:38:49,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:38:49,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:38:49,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:38:49,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:38:49,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:38:49,457 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:38:49,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:38:49,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:38:49,458 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:38:49,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:38:49,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:38:49,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:38:49,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:38:49,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:38:49,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:38:49,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:38:49,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:38:49,460 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:38:49,460 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:38:49,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:38:50,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:38:50,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:38:50,040 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:38:50,040 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:38:50,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/copysome1-1.i [2020-12-23 00:38:50,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/490bc8f06/9ad5e5767778402cb88f3bfb438d51c5/FLAG034379bdd [2020-12-23 00:38:50,981 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:38:50,981 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/copysome1-1.i [2020-12-23 00:38:50,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/490bc8f06/9ad5e5767778402cb88f3bfb438d51c5/FLAG034379bdd [2020-12-23 00:38:51,328 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/490bc8f06/9ad5e5767778402cb88f3bfb438d51c5 [2020-12-23 00:38:51,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:38:51,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:38:51,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:38:51,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:38:51,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:38:51,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:38:51" (1/1) ... [2020-12-23 00:38:51,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f7452e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:51, skipping insertion in model container [2020-12-23 00:38:51,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:38:51" (1/1) ... [2020-12-23 00:38:51,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:38:51,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:38:51,562 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/copysome1-1.i[806,819] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:38:51,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:38:51,596 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:38:51,615 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/copysome1-1.i[806,819] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:38:51,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:38:51,646 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:38:51,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:51 WrapperNode [2020-12-23 00:38:51,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:38:51,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:38:51,649 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:38:51,649 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:38:51,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:51" (1/1) ... [2020-12-23 00:38:51,671 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:51" (1/1) ... [2020-12-23 00:38:51,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:38:51,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:38:51,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:38:51,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:38:51,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:51" (1/1) ... [2020-12-23 00:38:51,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:51" (1/1) ... [2020-12-23 00:38:51,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:51" (1/1) ... [2020-12-23 00:38:51,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:51" (1/1) ... [2020-12-23 00:38:51,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:51" (1/1) ... [2020-12-23 00:38:51,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:51" (1/1) ... [2020-12-23 00:38:51,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:51" (1/1) ... [2020-12-23 00:38:51,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:38:51,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:38:51,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:38:51,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:38:51,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:38:51,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:38:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:38:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:38:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:38:51,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:38:51,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:38:51,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:38:52,188 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:38:52,188 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 00:38:52,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:38:52 BoogieIcfgContainer [2020-12-23 00:38:52,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:38:52,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:38:52,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:38:52,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:38:52,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:38:51" (1/3) ... [2020-12-23 00:38:52,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ee76d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:38:52, skipping insertion in model container [2020-12-23 00:38:52,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:38:51" (2/3) ... [2020-12-23 00:38:52,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ee76d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:38:52, skipping insertion in model container [2020-12-23 00:38:52,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:38:52" (3/3) ... [2020-12-23 00:38:52,203 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome1-1.i [2020-12-23 00:38:52,211 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:38:52,218 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:38:52,339 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:38:52,407 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:38:52,407 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:38:52,407 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:38:52,407 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:38:52,408 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:38:52,408 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:38:52,408 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:38:52,408 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:38:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-23 00:38:52,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:38:52,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:52,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:52,439 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:52,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:52,450 INFO L82 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2020-12-23 00:38:52,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:52,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625451109] [2020-12-23 00:38:52,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:38:52,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625451109] [2020-12-23 00:38:52,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:38:52,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:38:52,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849973352] [2020-12-23 00:38:52,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:38:52,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:52,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:38:52,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:38:52,853 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-23 00:38:52,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:52,897 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2020-12-23 00:38:52,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:38:52,900 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 00:38:52,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:52,928 INFO L225 Difference]: With dead ends: 36 [2020-12-23 00:38:52,929 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 00:38:52,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:38:52,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 00:38:52,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 00:38:52,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 00:38:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2020-12-23 00:38:52,999 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2020-12-23 00:38:53,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:53,000 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-12-23 00:38:53,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:38:53,000 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2020-12-23 00:38:53,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:38:53,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:53,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:53,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:38:53,006 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:53,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:53,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1919336157, now seen corresponding path program 1 times [2020-12-23 00:38:53,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:53,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310329697] [2020-12-23 00:38:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:38:53,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310329697] [2020-12-23 00:38:53,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:38:53,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:38:53,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275128764] [2020-12-23 00:38:53,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:38:53,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:53,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:38:53,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:38:53,174 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 3 states. [2020-12-23 00:38:53,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:53,295 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2020-12-23 00:38:53,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:38:53,296 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 00:38:53,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:53,298 INFO L225 Difference]: With dead ends: 33 [2020-12-23 00:38:53,298 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 00:38:53,301 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 [2020-12-23 00:38:53,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 00:38:53,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-12-23 00:38:53,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 00:38:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-12-23 00:38:53,322 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2020-12-23 00:38:53,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:53,323 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-12-23 00:38:53,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:38:53,324 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-12-23 00:38:53,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:38:53,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:53,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:53,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:38:53,328 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:53,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:53,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1458340319, now seen corresponding path program 1 times [2020-12-23 00:38:53,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:53,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981602240] [2020-12-23 00:38:53,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:38:53,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981602240] [2020-12-23 00:38:53,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873401013] [2020-12-23 00:38:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:53,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:38:53,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:38:53,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:53,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:38:53,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694767581] [2020-12-23 00:38:53,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:38:53,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:53,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:38:53,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:38:53,666 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2020-12-23 00:38:53,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:53,726 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2020-12-23 00:38:53,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:38:53,727 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 00:38:53,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:53,728 INFO L225 Difference]: With dead ends: 39 [2020-12-23 00:38:53,728 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 00:38:53,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:38:53,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 00:38:53,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-12-23 00:38:53,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 00:38:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-23 00:38:53,735 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2020-12-23 00:38:53,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:53,736 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-23 00:38:53,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:38:53,736 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-23 00:38:53,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 00:38:53,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:53,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:53,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:38:53,954 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:53,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:53,955 INFO L82 PathProgramCache]: Analyzing trace with hash -2030845279, now seen corresponding path program 2 times [2020-12-23 00:38:53,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:53,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472954318] [2020-12-23 00:38:53,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:38:54,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472954318] [2020-12-23 00:38:54,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3659905] [2020-12-23 00:38:54,040 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 [2020-12-23 00:38:54,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:38:54,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:54,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:38:54,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:38:54,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:54,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 00:38:54,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952156217] [2020-12-23 00:38:54,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:38:54,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:54,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:38:54,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:38:54,164 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 6 states. [2020-12-23 00:38:54,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:54,235 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2020-12-23 00:38:54,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:38:54,235 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-23 00:38:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:54,236 INFO L225 Difference]: With dead ends: 47 [2020-12-23 00:38:54,237 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 00:38:54,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:38:54,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 00:38:54,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-12-23 00:38:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 00:38:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-23 00:38:54,245 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 20 [2020-12-23 00:38:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:54,246 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-23 00:38:54,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:38:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-23 00:38:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 00:38:54,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:54,247 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:54,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:54,462 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:54,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:54,464 INFO L82 PathProgramCache]: Analyzing trace with hash -224231843, now seen corresponding path program 3 times [2020-12-23 00:38:54,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:54,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303027845] [2020-12-23 00:38:54,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:38:54,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303027845] [2020-12-23 00:38:54,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802439642] [2020-12-23 00:38:54,551 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 [2020-12-23 00:38:54,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:38:54,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:54,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:38:54,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:38:54,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:54,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:38:54,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134047575] [2020-12-23 00:38:54,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:38:54,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:54,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:38:54,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:38:54,720 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 7 states. [2020-12-23 00:38:54,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:54,798 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2020-12-23 00:38:54,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:38:54,798 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-12-23 00:38:54,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:54,800 INFO L225 Difference]: With dead ends: 55 [2020-12-23 00:38:54,800 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 00:38:54,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:38:54,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 00:38:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-12-23 00:38:54,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 00:38:54,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-12-23 00:38:54,808 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 25 [2020-12-23 00:38:54,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:54,809 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-12-23 00:38:54,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:38:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-12-23 00:38:54,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 00:38:54,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:54,811 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:55,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:55,027 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:55,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:55,028 INFO L82 PathProgramCache]: Analyzing trace with hash -736833947, now seen corresponding path program 4 times [2020-12-23 00:38:55,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:55,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734198277] [2020-12-23 00:38:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 00:38:55,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734198277] [2020-12-23 00:38:55,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727530546] [2020-12-23 00:38:55,159 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 [2020-12-23 00:38:55,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:38:55,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:55,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:38:55,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 00:38:55,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:55,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 00:38:55,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272475949] [2020-12-23 00:38:55,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:38:55,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:55,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:38:55,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:38:55,300 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 8 states. [2020-12-23 00:38:55,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:55,377 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2020-12-23 00:38:55,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:38:55,377 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-12-23 00:38:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:55,378 INFO L225 Difference]: With dead ends: 63 [2020-12-23 00:38:55,379 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 00:38:55,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:38:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 00:38:55,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-12-23 00:38:55,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 00:38:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-12-23 00:38:55,386 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 30 [2020-12-23 00:38:55,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:55,386 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-12-23 00:38:55,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:38:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-12-23 00:38:55,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:38:55,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:55,388 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:55,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:55,603 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:55,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:55,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1407538841, now seen corresponding path program 5 times [2020-12-23 00:38:55,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:55,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542129815] [2020-12-23 00:38:55,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 00:38:55,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542129815] [2020-12-23 00:38:55,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991801981] [2020-12-23 00:38:55,713 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 [2020-12-23 00:38:55,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 00:38:55,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:55,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:38:55,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 00:38:56,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:56,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 00:38:56,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119487232] [2020-12-23 00:38:56,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:38:56,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:56,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:38:56,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:38:56,062 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 9 states. [2020-12-23 00:38:56,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:56,151 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2020-12-23 00:38:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:38:56,152 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-12-23 00:38:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:56,158 INFO L225 Difference]: With dead ends: 71 [2020-12-23 00:38:56,159 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 00:38:56,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:38:56,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 00:38:56,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-12-23 00:38:56,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 00:38:56,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-12-23 00:38:56,177 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 35 [2020-12-23 00:38:56,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:56,178 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-12-23 00:38:56,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:38:56,178 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-12-23 00:38:56,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 00:38:56,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:56,183 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:56,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 00:38:56,398 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:56,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:56,399 INFO L82 PathProgramCache]: Analyzing trace with hash 968499753, now seen corresponding path program 6 times [2020-12-23 00:38:56,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:56,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844742341] [2020-12-23 00:38:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 00:38:56,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844742341] [2020-12-23 00:38:56,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268248933] [2020-12-23 00:38:56,551 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 [2020-12-23 00:38:56,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:38:56,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:56,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:38:56,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 00:38:56,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:56,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:38:56,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533660387] [2020-12-23 00:38:56,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:38:56,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:56,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:38:56,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:38:56,932 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 10 states. [2020-12-23 00:38:57,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:57,051 INFO L93 Difference]: Finished difference Result 79 states and 100 transitions. [2020-12-23 00:38:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:38:57,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-12-23 00:38:57,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:57,052 INFO L225 Difference]: With dead ends: 79 [2020-12-23 00:38:57,052 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 00:38:57,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:38:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 00:38:57,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-12-23 00:38:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:38:57,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-12-23 00:38:57,059 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 40 [2020-12-23 00:38:57,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:57,060 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-12-23 00:38:57,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:38:57,060 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-12-23 00:38:57,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:38:57,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:57,061 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:57,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:57,272 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:57,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:57,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1016346923, now seen corresponding path program 7 times [2020-12-23 00:38:57,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:57,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966400479] [2020-12-23 00:38:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:38:57,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966400479] [2020-12-23 00:38:57,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829076100] [2020-12-23 00:38:57,418 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 [2020-12-23 00:38:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:57,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:38:57,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:38:57,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:57,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:38:57,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294261286] [2020-12-23 00:38:57,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:38:57,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:57,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:38:57,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:38:57,563 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 11 states. [2020-12-23 00:38:57,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:57,696 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2020-12-23 00:38:57,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:38:57,697 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-12-23 00:38:57,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:57,698 INFO L225 Difference]: With dead ends: 87 [2020-12-23 00:38:57,698 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 00:38:57,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:38:57,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 00:38:57,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-12-23 00:38:57,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 00:38:57,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-12-23 00:38:57,709 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 45 [2020-12-23 00:38:57,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:57,709 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-12-23 00:38:57,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:38:57,709 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-12-23 00:38:57,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 00:38:57,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:57,711 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:57,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:57,926 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:57,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:57,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1143734803, now seen corresponding path program 8 times [2020-12-23 00:38:57,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:57,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009142908] [2020-12-23 00:38:57,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:38:58,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009142908] [2020-12-23 00:38:58,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456650426] [2020-12-23 00:38:58,071 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 [2020-12-23 00:38:58,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:38:58,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:58,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:38:58,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:38:58,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:58,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:38:58,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74526602] [2020-12-23 00:38:58,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:38:58,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:58,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:38:58,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:38:58,294 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 12 states. [2020-12-23 00:38:58,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:58,431 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-12-23 00:38:58,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:38:58,432 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-12-23 00:38:58,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:58,433 INFO L225 Difference]: With dead ends: 95 [2020-12-23 00:38:58,433 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 00:38:58,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:38:58,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 00:38:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-12-23 00:38:58,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 00:38:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-12-23 00:38:58,454 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 50 [2020-12-23 00:38:58,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:58,456 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-12-23 00:38:58,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:38:58,457 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-12-23 00:38:58,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 00:38:58,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:58,459 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:58,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:38:58,675 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:58,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1908772625, now seen corresponding path program 9 times [2020-12-23 00:38:58,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:58,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155672039] [2020-12-23 00:38:58,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 00:38:58,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155672039] [2020-12-23 00:38:58,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416465769] [2020-12-23 00:38:58,866 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 [2020-12-23 00:39:01,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 00:39:01,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:01,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:39:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 00:39:01,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:01,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:39:01,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806184015] [2020-12-23 00:39:01,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:39:01,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:01,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:39:01,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:39:01,201 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 13 states. [2020-12-23 00:39:01,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:01,351 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2020-12-23 00:39:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:39:01,352 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-12-23 00:39:01,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:01,353 INFO L225 Difference]: With dead ends: 103 [2020-12-23 00:39:01,353 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 00:39:01,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:39:01,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 00:39:01,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-12-23 00:39:01,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 00:39:01,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-12-23 00:39:01,361 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 55 [2020-12-23 00:39:01,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:01,361 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-12-23 00:39:01,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:39:01,362 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-12-23 00:39:01,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 00:39:01,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:01,363 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:01,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:01,578 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:01,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:01,579 INFO L82 PathProgramCache]: Analyzing trace with hash -967663183, now seen corresponding path program 10 times [2020-12-23 00:39:01,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:01,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379576088] [2020-12-23 00:39:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 00:39:01,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379576088] [2020-12-23 00:39:01,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039998365] [2020-12-23 00:39:01,756 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 [2020-12-23 00:39:01,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:39:01,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:01,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:39:01,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 00:39:02,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:02,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:39:02,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932020815] [2020-12-23 00:39:02,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:39:02,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:02,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:39:02,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:39:02,025 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 14 states. [2020-12-23 00:39:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:02,186 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2020-12-23 00:39:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:39:02,186 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-12-23 00:39:02,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:02,187 INFO L225 Difference]: With dead ends: 111 [2020-12-23 00:39:02,187 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 00:39:02,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:39:02,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 00:39:02,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-12-23 00:39:02,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 00:39:02,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2020-12-23 00:39:02,194 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 60 [2020-12-23 00:39:02,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:02,194 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2020-12-23 00:39:02,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:39:02,195 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2020-12-23 00:39:02,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 00:39:02,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:02,196 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:02,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:02,411 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:02,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:02,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2055049395, now seen corresponding path program 11 times [2020-12-23 00:39:02,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:02,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787475175] [2020-12-23 00:39:02,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-23 00:39:02,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787475175] [2020-12-23 00:39:02,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833357510] [2020-12-23 00:39:02,591 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 [2020-12-23 00:39:40,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 00:39:40,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:40,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:39:40,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-23 00:39:41,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:41,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 00:39:41,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417654722] [2020-12-23 00:39:41,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:39:41,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:41,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:39:41,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:39:41,064 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 15 states. [2020-12-23 00:39:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:41,241 INFO L93 Difference]: Finished difference Result 119 states and 150 transitions. [2020-12-23 00:39:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:39:41,242 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2020-12-23 00:39:41,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:41,244 INFO L225 Difference]: With dead ends: 119 [2020-12-23 00:39:41,244 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 00:39:41,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:39:41,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 00:39:41,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-12-23 00:39:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 00:39:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2020-12-23 00:39:41,264 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 65 [2020-12-23 00:39:41,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:41,265 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2020-12-23 00:39:41,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:39:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2020-12-23 00:39:41,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 00:39:41,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:41,266 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:41,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:39:41,481 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:41,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:41,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1898335605, now seen corresponding path program 12 times [2020-12-23 00:39:41,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:41,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843549177] [2020-12-23 00:39:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 00:39:41,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843549177] [2020-12-23 00:39:41,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95513655] [2020-12-23 00:39:41,708 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 [2020-12-23 00:39:55,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 00:39:55,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:55,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:39:55,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 23 proven. 210 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 00:39:55,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:55,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 18 [2020-12-23 00:39:55,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607802805] [2020-12-23 00:39:55,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:39:55,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:55,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:39:55,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:39:55,358 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 18 states. [2020-12-23 00:39:55,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:55,556 INFO L93 Difference]: Finished difference Result 129 states and 164 transitions. [2020-12-23 00:39:55,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:39:55,557 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-12-23 00:39:55,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:55,558 INFO L225 Difference]: With dead ends: 129 [2020-12-23 00:39:55,558 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 00:39:55,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:39:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 00:39:55,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-12-23 00:39:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 00:39:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-12-23 00:39:55,586 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 70 [2020-12-23 00:39:55,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:55,586 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-12-23 00:39:55,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:39:55,586 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-12-23 00:39:55,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 00:39:55,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:55,587 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:55,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:39:55,790 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:55,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:55,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1002487495, now seen corresponding path program 13 times [2020-12-23 00:39:55,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:55,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640538887] [2020-12-23 00:39:55,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-23 00:39:56,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640538887] [2020-12-23 00:39:56,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632376197] [2020-12-23 00:39:56,088 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 [2020-12-23 00:39:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:56,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:39:56,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-23 00:39:56,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:56,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 00:39:56,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446069836] [2020-12-23 00:39:56,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:39:56,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:56,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:39:56,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:39:56,340 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 18 states. [2020-12-23 00:39:56,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:56,526 INFO L93 Difference]: Finished difference Result 143 states and 180 transitions. [2020-12-23 00:39:56,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:39:56,527 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-23 00:39:56,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:56,528 INFO L225 Difference]: With dead ends: 143 [2020-12-23 00:39:56,528 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 00:39:56,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:39:56,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 00:39:56,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-12-23 00:39:56,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 00:39:56,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2020-12-23 00:39:56,534 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 80 [2020-12-23 00:39:56,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:56,535 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2020-12-23 00:39:56,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:39:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2020-12-23 00:39:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 00:39:56,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:56,536 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:56,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:39:56,751 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:56,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:56,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1385924667, now seen corresponding path program 14 times [2020-12-23 00:39:56,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:56,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963069000] [2020-12-23 00:39:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 00:39:57,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963069000] [2020-12-23 00:39:57,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520876281] [2020-12-23 00:39:57,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:57,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:39:57,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:57,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:39:57,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 00:39:57,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:57,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 00:39:57,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874497130] [2020-12-23 00:39:57,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:39:57,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:57,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:39:57,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:39:57,314 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand 19 states. [2020-12-23 00:39:57,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:57,514 INFO L93 Difference]: Finished difference Result 151 states and 190 transitions. [2020-12-23 00:39:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:39:57,515 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-12-23 00:39:57,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:57,516 INFO L225 Difference]: With dead ends: 151 [2020-12-23 00:39:57,516 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 00:39:57,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:39:57,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 00:39:57,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-12-23 00:39:57,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 00:39:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2020-12-23 00:39:57,523 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 85 [2020-12-23 00:39:57,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:57,523 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2020-12-23 00:39:57,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:39:57,524 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2020-12-23 00:39:57,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 00:39:57,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:57,525 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:57,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:57,738 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:57,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:57,739 INFO L82 PathProgramCache]: Analyzing trace with hash -74597123, now seen corresponding path program 15 times [2020-12-23 00:39:57,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:57,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211962145] [2020-12-23 00:39:57,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-23 00:39:58,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211962145] [2020-12-23 00:39:58,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903945319] [2020-12-23 00:39:58,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:40:39,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-12-23 00:40:39,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:40:39,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:40:39,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-23 00:40:39,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:40:39,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:40:39,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088628418] [2020-12-23 00:40:39,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:40:39,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:39,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:40:39,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:40:39,301 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand 20 states. [2020-12-23 00:40:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:39,541 INFO L93 Difference]: Finished difference Result 159 states and 200 transitions. [2020-12-23 00:40:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:40:39,542 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 90 [2020-12-23 00:40:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:39,543 INFO L225 Difference]: With dead ends: 159 [2020-12-23 00:40:39,543 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 00:40:39,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:40:39,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 00:40:39,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-12-23 00:40:39,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 00:40:39,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2020-12-23 00:40:39,550 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 90 [2020-12-23 00:40:39,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:39,550 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2020-12-23 00:40:39,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:40:39,551 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2020-12-23 00:40:39,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-23 00:40:39,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:39,552 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:39,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:40:39,753 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:39,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:39,754 INFO L82 PathProgramCache]: Analyzing trace with hash 2024349697, now seen corresponding path program 16 times [2020-12-23 00:40:39,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:39,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123495034] [2020-12-23 00:40:39,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:40:40,103 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-23 00:40:40,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123495034] [2020-12-23 00:40:40,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204682544] [2020-12-23 00:40:40,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:40:40,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:40:40,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:40:40,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:40:40,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-23 00:40:40,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:40:40,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 00:40:40,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971535054] [2020-12-23 00:40:40,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:40:40,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:40,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:40:40,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:40:40,696 INFO L87 Difference]: Start difference. First operand 98 states and 118 transitions. Second operand 21 states. [2020-12-23 00:40:40,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:40,944 INFO L93 Difference]: Finished difference Result 167 states and 210 transitions. [2020-12-23 00:40:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:40:40,944 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 95 [2020-12-23 00:40:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:40,946 INFO L225 Difference]: With dead ends: 167 [2020-12-23 00:40:40,946 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 00:40:40,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:40:40,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 00:40:40,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-12-23 00:40:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 00:40:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2020-12-23 00:40:40,952 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 95 [2020-12-23 00:40:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:40,953 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2020-12-23 00:40:40,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:40:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2020-12-23 00:40:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 00:40:40,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:40,954 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:41,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:40:41,169 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:41,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:41,170 INFO L82 PathProgramCache]: Analyzing trace with hash -889061183, now seen corresponding path program 17 times [2020-12-23 00:40:41,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:41,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565474255] [2020-12-23 00:40:41,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:40:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-23 00:40:41,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565474255] [2020-12-23 00:40:41,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815039814] [2020-12-23 00:40:41,560 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