/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-178dd20 [2021-01-06 10:28:11,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:28:11,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:28:11,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:28:11,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:28:11,266 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:28:11,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:28:11,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:28:11,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:28:11,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:28:11,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:28:11,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:28:11,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:28:11,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:28:11,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:28:11,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:28:11,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:28:11,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:28:11,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:28:11,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:28:11,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:28:11,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:28:11,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:28:11,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:28:11,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:28:11,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:28:11,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:28:11,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:28:11,353 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:28:11,399 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:28:11,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:28:11,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:28:11,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:28:11,404 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:28:11,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:28:11,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:28:11,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:28:11,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:28:11,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:28:11,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:28:11,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:28:11,406 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:28:11,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:28:11,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:28:11,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:28:11,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:28:11,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:28:11,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:28:11,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:28:11,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:28:11,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:28:11,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:28:11,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:28:11,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:28:11,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:28:11,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:28:11,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:28:11,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:28:11,873 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:28:11,874 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:28:11,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/copysome1-1.i [2021-01-06 10:28:11,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/eee655026/cd9472a8ab874b4f8d62a70515600b1d/FLAG2eee8a1b0 [2021-01-06 10:28:12,528 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:28:12,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/copysome1-1.i [2021-01-06 10:28:12,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/eee655026/cd9472a8ab874b4f8d62a70515600b1d/FLAG2eee8a1b0 [2021-01-06 10:28:12,873 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/eee655026/cd9472a8ab874b4f8d62a70515600b1d [2021-01-06 10:28:12,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:28:12,879 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:28:12,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:28:12,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:28:12,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:28:12,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:28:12" (1/1) ... [2021-01-06 10:28:12,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@523d2263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:12, skipping insertion in model container [2021-01-06 10:28:12,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:28:12" (1/1) ... [2021-01-06 10:28:12,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:28:12,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:28:13,115 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,] [2021-01-06 10:28:13,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:28:13,148 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:28:13,163 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,] [2021-01-06 10:28:13,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:28:13,189 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:28:13,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:13 WrapperNode [2021-01-06 10:28:13,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:28:13,191 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:28:13,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:28:13,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:28:13,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:13" (1/1) ... [2021-01-06 10:28:13,212 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:13" (1/1) ... [2021-01-06 10:28:13,243 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:28:13,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:28:13,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:28:13,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:28:13,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:13" (1/1) ... [2021-01-06 10:28:13,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:13" (1/1) ... [2021-01-06 10:28:13,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:13" (1/1) ... [2021-01-06 10:28:13,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:13" (1/1) ... [2021-01-06 10:28:13,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:13" (1/1) ... [2021-01-06 10:28:13,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:13" (1/1) ... [2021-01-06 10:28:13,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:13" (1/1) ... [2021-01-06 10:28:13,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:28:13,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:28:13,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:28:13,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:28:13,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:28:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:28:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:28:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:28:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:28:13,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:28:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:28:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:28:13,721 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:28:13,721 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 10:28:13,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:28:13 BoogieIcfgContainer [2021-01-06 10:28:13,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:28:13,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:28:13,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:28:13,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:28:13,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:28:12" (1/3) ... [2021-01-06 10:28:13,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e44d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:28:13, skipping insertion in model container [2021-01-06 10:28:13,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:13" (2/3) ... [2021-01-06 10:28:13,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e44d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:28:13, skipping insertion in model container [2021-01-06 10:28:13,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:28:13" (3/3) ... [2021-01-06 10:28:13,734 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome1-1.i [2021-01-06 10:28:13,743 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:28:13,748 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:28:13,797 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:28:13,863 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:28:13,864 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:28:13,864 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:28:13,864 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:28:13,865 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:28:13,865 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:28:13,865 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:28:13,865 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:28:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 10:28:13,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 10:28:13,904 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:13,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:13,906 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:13,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:13,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2021-01-06 10:28:13,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:13,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622367387] [2021-01-06 10:28:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:14,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622367387] [2021-01-06 10:28:14,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:28:14,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:28:14,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871726019] [2021-01-06 10:28:14,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:28:14,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:14,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:28:14,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:28:14,109 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2021-01-06 10:28:14,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:14,127 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-01-06 10:28:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:28:14,129 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-01-06 10:28:14,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:14,138 INFO L225 Difference]: With dead ends: 36 [2021-01-06 10:28:14,139 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 10:28:14,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:28:14,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 10:28:14,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 10:28:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 10:28:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-01-06 10:28:14,179 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2021-01-06 10:28:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:14,179 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-01-06 10:28:14,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:28:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-01-06 10:28:14,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 10:28:14,180 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:14,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:14,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:28:14,182 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:14,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:14,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1919336157, now seen corresponding path program 1 times [2021-01-06 10:28:14,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:14,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155893554] [2021-01-06 10:28:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:14,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155893554] [2021-01-06 10:28:14,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:28:14,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:28:14,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70202509] [2021-01-06 10:28:14,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:28:14,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:14,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:28:14,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:28:14,247 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 3 states. [2021-01-06 10:28:14,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:14,327 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-01-06 10:28:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:28:14,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 10:28:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:14,329 INFO L225 Difference]: With dead ends: 33 [2021-01-06 10:28:14,329 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 10:28:14,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:28:14,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 10:28:14,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-01-06 10:28:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 10:28:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-01-06 10:28:14,342 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-01-06 10:28:14,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:14,344 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-01-06 10:28:14,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:28:14,345 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-01-06 10:28:14,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:28:14,345 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:14,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:14,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:28:14,349 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:14,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:14,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1458340319, now seen corresponding path program 1 times [2021-01-06 10:28:14,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:14,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453205665] [2021-01-06 10:28:14,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:28:14,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453205665] [2021-01-06 10:28:14,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821874335] [2021-01-06 10:28:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:14,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:28:14,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:28:14,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:14,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:28:14,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677140292] [2021-01-06 10:28:14,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:28:14,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:14,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:28:14,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:28:14,574 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2021-01-06 10:28:14,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:14,620 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-01-06 10:28:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:28:14,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-01-06 10:28:14,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:14,621 INFO L225 Difference]: With dead ends: 39 [2021-01-06 10:28:14,621 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 10:28:14,622 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 [2021-01-06 10:28:14,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 10:28:14,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-01-06 10:28:14,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 10:28:14,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-01-06 10:28:14,627 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2021-01-06 10:28:14,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:14,628 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-01-06 10:28:14,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:28:14,628 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-01-06 10:28:14,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 10:28:14,629 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:14,629 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:14,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:28:14,844 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:14,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:14,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2030845279, now seen corresponding path program 2 times [2021-01-06 10:28:14,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:14,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672764469] [2021-01-06 10:28:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 10:28:14,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672764469] [2021-01-06 10:28:14,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123133306] [2021-01-06 10:28:14,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:15,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:15,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:15,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:28:15,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 10:28:15,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:15,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 10:28:15,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162704314] [2021-01-06 10:28:15,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:28:15,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:15,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:28:15,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:28:15,081 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 6 states. [2021-01-06 10:28:15,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:15,141 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2021-01-06 10:28:15,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:28:15,142 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2021-01-06 10:28:15,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:15,143 INFO L225 Difference]: With dead ends: 47 [2021-01-06 10:28:15,143 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 10:28:15,144 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 [2021-01-06 10:28:15,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 10:28:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-01-06 10:28:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:28:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-01-06 10:28:15,150 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 20 [2021-01-06 10:28:15,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:15,151 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-01-06 10:28:15,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:28:15,151 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-01-06 10:28:15,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:28:15,152 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:15,153 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:15,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:15,368 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:15,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:15,369 INFO L82 PathProgramCache]: Analyzing trace with hash -224231843, now seen corresponding path program 3 times [2021-01-06 10:28:15,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:15,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488099232] [2021-01-06 10:28:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 10:28:15,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488099232] [2021-01-06 10:28:15,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135953545] [2021-01-06 10:28:15,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:15,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:28:15,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:15,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:28:15,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 10:28:15,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:15,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:28:15,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749325735] [2021-01-06 10:28:15,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:28:15,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:15,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:28:15,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:28:15,583 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 7 states. [2021-01-06 10:28:15,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:15,657 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2021-01-06 10:28:15,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:28:15,657 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2021-01-06 10:28:15,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:15,659 INFO L225 Difference]: With dead ends: 55 [2021-01-06 10:28:15,659 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 10:28:15,660 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 [2021-01-06 10:28:15,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 10:28:15,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-01-06 10:28:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 10:28:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-01-06 10:28:15,667 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 25 [2021-01-06 10:28:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:15,667 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-01-06 10:28:15,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:28:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-01-06 10:28:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 10:28:15,669 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:15,669 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:15,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:15,883 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:15,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:15,885 INFO L82 PathProgramCache]: Analyzing trace with hash -736833947, now seen corresponding path program 4 times [2021-01-06 10:28:15,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:15,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864427073] [2021-01-06 10:28:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:28:15,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864427073] [2021-01-06 10:28:15,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936219375] [2021-01-06 10:28:15,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:16,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:28:16,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:16,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:28:16,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:28:16,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:16,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 10:28:16,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986710728] [2021-01-06 10:28:16,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:28:16,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:16,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:28:16,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:28:16,188 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 8 states. [2021-01-06 10:28:16,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:16,299 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2021-01-06 10:28:16,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:28:16,300 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2021-01-06 10:28:16,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:16,305 INFO L225 Difference]: With dead ends: 63 [2021-01-06 10:28:16,305 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 10:28:16,308 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 [2021-01-06 10:28:16,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 10:28:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-01-06 10:28:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 10:28:16,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-01-06 10:28:16,328 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 30 [2021-01-06 10:28:16,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:16,328 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-01-06 10:28:16,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:28:16,328 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-01-06 10:28:16,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:28:16,330 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:16,330 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:16,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:16,532 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:16,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:16,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1407538841, now seen corresponding path program 5 times [2021-01-06 10:28:16,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:16,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669971256] [2021-01-06 10:28:16,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 10:28:16,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669971256] [2021-01-06 10:28:16,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202762658] [2021-01-06 10:28:16,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:16,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 10:28:16,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:16,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:28:16,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 10:28:16,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:16,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 10:28:16,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655868506] [2021-01-06 10:28:16,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:28:16,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:16,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:28:16,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:16,971 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 9 states. [2021-01-06 10:28:17,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:17,051 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2021-01-06 10:28:17,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:28:17,052 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2021-01-06 10:28:17,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:17,053 INFO L225 Difference]: With dead ends: 71 [2021-01-06 10:28:17,053 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 10:28:17,054 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 [2021-01-06 10:28:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 10:28:17,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-01-06 10:28:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 10:28:17,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-01-06 10:28:17,060 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 35 [2021-01-06 10:28:17,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:17,060 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-01-06 10:28:17,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:28:17,061 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-01-06 10:28:17,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 10:28:17,062 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:17,062 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:17,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 10:28:17,276 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:17,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:17,277 INFO L82 PathProgramCache]: Analyzing trace with hash 968499753, now seen corresponding path program 6 times [2021-01-06 10:28:17,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:17,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496989339] [2021-01-06 10:28:17,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 10:28:17,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496989339] [2021-01-06 10:28:17,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618215984] [2021-01-06 10:28:17,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:17,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:28:17,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:17,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:28:17,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 10:28:17,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:17,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:28:17,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742477910] [2021-01-06 10:28:17,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:28:17,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:17,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:28:17,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:28:17,725 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 10 states. [2021-01-06 10:28:17,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:17,820 INFO L93 Difference]: Finished difference Result 79 states and 100 transitions. [2021-01-06 10:28:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:28:17,821 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2021-01-06 10:28:17,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:17,822 INFO L225 Difference]: With dead ends: 79 [2021-01-06 10:28:17,823 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 10:28:17,824 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 [2021-01-06 10:28:17,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 10:28:17,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2021-01-06 10:28:17,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:28:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-01-06 10:28:17,846 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 40 [2021-01-06 10:28:17,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:17,846 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-01-06 10:28:17,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:28:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-01-06 10:28:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 10:28:17,855 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:17,857 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:18,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:18,073 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:18,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:18,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1016346923, now seen corresponding path program 7 times [2021-01-06 10:28:18,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:18,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128868379] [2021-01-06 10:28:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:28:18,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128868379] [2021-01-06 10:28:18,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43292481] [2021-01-06 10:28:18,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:18,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:28:18,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:28:18,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:18,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 10:28:18,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649343086] [2021-01-06 10:28:18,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:28:18,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:18,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:28:18,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:18,327 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 11 states. [2021-01-06 10:28:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:18,425 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2021-01-06 10:28:18,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:28:18,426 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2021-01-06 10:28:18,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:18,427 INFO L225 Difference]: With dead ends: 87 [2021-01-06 10:28:18,427 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 10:28:18,428 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 [2021-01-06 10:28:18,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 10:28:18,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-01-06 10:28:18,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 10:28:18,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2021-01-06 10:28:18,433 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 45 [2021-01-06 10:28:18,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:18,434 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-01-06 10:28:18,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:28:18,434 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2021-01-06 10:28:18,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 10:28:18,435 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:18,435 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:18,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:18,651 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:18,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:18,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1143734803, now seen corresponding path program 8 times [2021-01-06 10:28:18,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:18,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707976506] [2021-01-06 10:28:18,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-06 10:28:18,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707976506] [2021-01-06 10:28:18,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444317195] [2021-01-06 10:28:18,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:18,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:18,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:18,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:28:18,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-06 10:28:18,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:18,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 10:28:18,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355658732] [2021-01-06 10:28:18,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:28:18,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:18,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:28:18,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:28:18,960 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 12 states. [2021-01-06 10:28:19,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:19,073 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2021-01-06 10:28:19,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:28:19,074 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2021-01-06 10:28:19,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:19,074 INFO L225 Difference]: With dead ends: 95 [2021-01-06 10:28:19,075 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 10:28:19,075 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 [2021-01-06 10:28:19,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 10:28:19,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2021-01-06 10:28:19,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 10:28:19,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2021-01-06 10:28:19,081 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 50 [2021-01-06 10:28:19,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:19,081 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2021-01-06 10:28:19,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:28:19,081 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2021-01-06 10:28:19,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 10:28:19,082 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:19,082 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:19,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:28:19,297 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:19,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:19,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1908772625, now seen corresponding path program 9 times [2021-01-06 10:28:19,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:19,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732562910] [2021-01-06 10:28:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-06 10:28:19,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732562910] [2021-01-06 10:28:19,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128905972] [2021-01-06 10:28:19,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:21,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 10:28:21,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:21,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:28:21,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-06 10:28:21,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:21,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:28:21,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048309833] [2021-01-06 10:28:21,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:28:21,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:21,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:28:21,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:28:21,231 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 13 states. [2021-01-06 10:28:21,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:21,349 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2021-01-06 10:28:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:28:21,350 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2021-01-06 10:28:21,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:21,351 INFO L225 Difference]: With dead ends: 103 [2021-01-06 10:28:21,351 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 10:28:21,352 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 [2021-01-06 10:28:21,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 10:28:21,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-01-06 10:28:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 10:28:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-01-06 10:28:21,357 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 55 [2021-01-06 10:28:21,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:21,358 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-01-06 10:28:21,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:28:21,358 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-01-06 10:28:21,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 10:28:21,359 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:21,359 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:21,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:21,574 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:21,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:21,574 INFO L82 PathProgramCache]: Analyzing trace with hash -967663183, now seen corresponding path program 10 times [2021-01-06 10:28:21,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:21,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603902726] [2021-01-06 10:28:21,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-06 10:28:21,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603902726] [2021-01-06 10:28:21,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716982827] [2021-01-06 10:28:21,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:21,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:28:21,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:21,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:28:21,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-06 10:28:22,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:22,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 10:28:22,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124166568] [2021-01-06 10:28:22,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:28:22,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:22,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:28:22,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:28:22,030 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 14 states. [2021-01-06 10:28:22,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:22,181 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2021-01-06 10:28:22,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:28:22,181 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2021-01-06 10:28:22,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:22,183 INFO L225 Difference]: With dead ends: 111 [2021-01-06 10:28:22,183 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 10:28:22,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:28:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 10:28:22,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-01-06 10:28:22,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 10:28:22,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-01-06 10:28:22,191 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 60 [2021-01-06 10:28:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:22,193 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-01-06 10:28:22,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:28:22,193 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-01-06 10:28:22,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 10:28:22,194 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:22,194 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:22,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:22,409 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:22,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:22,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2055049395, now seen corresponding path program 11 times [2021-01-06 10:28:22,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:22,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812547738] [2021-01-06 10:28:22,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-01-06 10:28:22,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812547738] [2021-01-06 10:28:22,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504069423] [2021-01-06 10:28:22,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:51,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 10:28:51,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:51,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:28:51,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-01-06 10:28:51,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:51,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 10:28:51,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236642674] [2021-01-06 10:28:51,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:28:51,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:51,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:28:51,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:28:51,392 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 15 states. [2021-01-06 10:28:51,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:51,530 INFO L93 Difference]: Finished difference Result 119 states and 150 transitions. [2021-01-06 10:28:51,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:28:51,531 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2021-01-06 10:28:51,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:51,532 INFO L225 Difference]: With dead ends: 119 [2021-01-06 10:28:51,532 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 10:28:51,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:28:51,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 10:28:51,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-01-06 10:28:51,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 10:28:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2021-01-06 10:28:51,538 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 65 [2021-01-06 10:28:51,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:51,538 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2021-01-06 10:28:51,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:28:51,538 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2021-01-06 10:28:51,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 10:28:51,539 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:51,540 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:51,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:28:51,755 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:51,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:51,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1898335605, now seen corresponding path program 12 times [2021-01-06 10:28:51,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:51,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293840776] [2021-01-06 10:28:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 10:28:51,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293840776] [2021-01-06 10:28:51,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729022997] [2021-01-06 10:28:51,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:02,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:29:02,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:02,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 10:29:02,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 23 proven. 210 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 10:29:02,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:29:02,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 18 [2021-01-06 10:29:02,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344881252] [2021-01-06 10:29:02,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:29:02,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:02,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:29:02,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:29:02,430 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 18 states. [2021-01-06 10:29:02,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:02,573 INFO L93 Difference]: Finished difference Result 129 states and 164 transitions. [2021-01-06 10:29:02,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:29:02,573 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2021-01-06 10:29:02,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:02,574 INFO L225 Difference]: With dead ends: 129 [2021-01-06 10:29:02,574 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 10:29:02,575 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 [2021-01-06 10:29:02,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 10:29:02,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-01-06 10:29:02,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 10:29:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2021-01-06 10:29:02,580 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 70 [2021-01-06 10:29:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:02,580 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2021-01-06 10:29:02,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:29:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2021-01-06 10:29:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 10:29:02,582 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:02,582 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:02,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:29:02,798 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:02,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:02,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1002487495, now seen corresponding path program 13 times [2021-01-06 10:29:02,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:02,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395782341] [2021-01-06 10:29:02,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-01-06 10:29:03,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395782341] [2021-01-06 10:29:03,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970631295] [2021-01-06 10:29:03,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:03,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:29:03,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-01-06 10:29:03,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:29:03,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 10:29:03,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828399255] [2021-01-06 10:29:03,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:29:03,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:03,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:29:03,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:29:03,193 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 18 states. [2021-01-06 10:29:03,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:03,355 INFO L93 Difference]: Finished difference Result 143 states and 180 transitions. [2021-01-06 10:29:03,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:29:03,355 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2021-01-06 10:29:03,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:03,356 INFO L225 Difference]: With dead ends: 143 [2021-01-06 10:29:03,356 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 10:29:03,357 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 [2021-01-06 10:29:03,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 10:29:03,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-01-06 10:29:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 10:29:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2021-01-06 10:29:03,362 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 80 [2021-01-06 10:29:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:03,362 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2021-01-06 10:29:03,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:29:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2021-01-06 10:29:03,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-01-06 10:29:03,363 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:03,363 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:03,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:29:03,577 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:03,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:03,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1385924667, now seen corresponding path program 14 times [2021-01-06 10:29:03,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:03,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128163508] [2021-01-06 10:29:03,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-01-06 10:29:03,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128163508] [2021-01-06 10:29:03,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973194239] [2021-01-06 10:29:03,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:03,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:03,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:03,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:29:03,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-01-06 10:29:03,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:29:03,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 10:29:03,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15928180] [2021-01-06 10:29:03,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:29:03,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:03,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:29:03,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:29:03,999 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand 19 states. [2021-01-06 10:29:04,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:04,164 INFO L93 Difference]: Finished difference Result 151 states and 190 transitions. [2021-01-06 10:29:04,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:29:04,165 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2021-01-06 10:29:04,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:04,166 INFO L225 Difference]: With dead ends: 151 [2021-01-06 10:29:04,166 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 10:29:04,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:29:04,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 10:29:04,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2021-01-06 10:29:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 10:29:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2021-01-06 10:29:04,171 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 85 [2021-01-06 10:29:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:04,171 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2021-01-06 10:29:04,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:29:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2021-01-06 10:29:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-01-06 10:29:04,172 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:04,173 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:04,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:04,385 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:04,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:04,386 INFO L82 PathProgramCache]: Analyzing trace with hash -74597123, now seen corresponding path program 15 times [2021-01-06 10:29:04,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:04,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934692943] [2021-01-06 10:29:04,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-01-06 10:29:04,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934692943] [2021-01-06 10:29:04,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810731369] [2021-01-06 10:29:04,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:34,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-01-06 10:29:34,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:34,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:29:34,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-01-06 10:29:34,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:29:34,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 10:29:34,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561981877] [2021-01-06 10:29:34,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:29:34,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:34,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:29:34,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:29:34,532 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand 20 states. [2021-01-06 10:29:34,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:34,752 INFO L93 Difference]: Finished difference Result 159 states and 200 transitions. [2021-01-06 10:29:34,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:29:34,753 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 90 [2021-01-06 10:29:34,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:34,754 INFO L225 Difference]: With dead ends: 159 [2021-01-06 10:29:34,754 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 10:29:34,755 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 [2021-01-06 10:29:34,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 10:29:34,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2021-01-06 10:29:34,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 10:29:34,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2021-01-06 10:29:34,759 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 90 [2021-01-06 10:29:34,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:34,760 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2021-01-06 10:29:34,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:29:34,760 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2021-01-06 10:29:34,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-01-06 10:29:34,761 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:34,761 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:34,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:29:34,976 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:34,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:34,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2024349697, now seen corresponding path program 16 times [2021-01-06 10:29:34,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:34,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171263134] [2021-01-06 10:29:34,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-01-06 10:29:35,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171263134] [2021-01-06 10:29:35,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973746100] [2021-01-06 10:29:35,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:35,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:35,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:35,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:29:35,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-01-06 10:29:35,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:29:35,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 10:29:35,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466374309] [2021-01-06 10:29:35,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:29:35,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:35,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:29:35,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:29:35,741 INFO L87 Difference]: Start difference. First operand 98 states and 118 transitions. Second operand 21 states. [2021-01-06 10:29:35,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:35,966 INFO L93 Difference]: Finished difference Result 167 states and 210 transitions. [2021-01-06 10:29:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:29:35,967 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 95 [2021-01-06 10:29:35,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:35,968 INFO L225 Difference]: With dead ends: 167 [2021-01-06 10:29:35,968 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 10:29:35,968 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 [2021-01-06 10:29:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 10:29:35,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2021-01-06 10:29:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-01-06 10:29:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2021-01-06 10:29:35,973 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 95 [2021-01-06 10:29:35,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:35,973 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2021-01-06 10:29:35,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:29:35,973 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2021-01-06 10:29:35,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 10:29:35,974 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:35,974 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:36,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:29:36,184 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:36,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:36,185 INFO L82 PathProgramCache]: Analyzing trace with hash -889061183, now seen corresponding path program 17 times [2021-01-06 10:29:36,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:36,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546995730] [2021-01-06 10:29:36,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-01-06 10:29:36,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546995730] [2021-01-06 10:29:36,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641658228] [2021-01-06 10:29:36,472 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