/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/reducercommutativity/max40-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:24:27,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:24:27,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:24:27,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:24:27,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:24:27,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:24:27,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:24:27,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:24:27,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:24:27,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:24:27,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:24:27,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:24:27,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:24:27,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:24:27,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:24:27,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:24:27,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:24:27,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:24:27,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:24:27,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:24:27,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:24:27,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:24:27,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:24:27,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:24:27,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:24:27,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:24:27,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:24:27,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:24:27,283 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:24:27,342 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:24:27,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:24:27,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:24:27,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:24:27,348 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:24:27,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:24:27,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:24:27,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:24:27,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:24:27,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:24:27,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:24:27,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:24:27,350 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:24:27,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:24:27,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:24:27,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:24:27,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:24:27,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:24:27,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:24:27,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:24:27,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:24:27,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:24:27,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:24:27,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:24:27,353 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:24:27,353 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:24:27,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:24:27,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:24:27,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:24:27,795 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:24:27,796 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:24:27,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/max40-1.i [2020-12-23 00:24:27,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/86add691a/87324511df824a57b1a300559a6ddf6c/FLAG46929f562 [2020-12-23 00:24:28,569 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:24:28,570 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max40-1.i [2020-12-23 00:24:28,579 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/86add691a/87324511df824a57b1a300559a6ddf6c/FLAG46929f562 [2020-12-23 00:24:28,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/86add691a/87324511df824a57b1a300559a6ddf6c [2020-12-23 00:24:28,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:24:28,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:24:28,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:24:28,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:24:28,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:24:28,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:24:28" (1/1) ... [2020-12-23 00:24:28,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a431d9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:24:28, skipping insertion in model container [2020-12-23 00:24:28,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:24:28" (1/1) ... [2020-12-23 00:24:28,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:24:28,964 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[39]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:24:29,183 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/reducercommutativity/max40-1.i[1290,1303] [2020-12-23 00:24:29,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:24:29,220 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[156],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:24:29,283 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/reducercommutativity/max40-1.i[1290,1303] [2020-12-23 00:24:29,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:24:29,319 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:24:29,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:24:29 WrapperNode [2020-12-23 00:24:29,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:24:29,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:24:29,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:24:29,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:24:29,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:24:29" (1/1) ... [2020-12-23 00:24:29,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:24:29" (1/1) ... [2020-12-23 00:24:29,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:24:29,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:24:29,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:24:29,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:24:29,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:24:29" (1/1) ... [2020-12-23 00:24:29,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:24:29" (1/1) ... [2020-12-23 00:24:29,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:24:29" (1/1) ... [2020-12-23 00:24:29,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:24:29" (1/1) ... [2020-12-23 00:24:29,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:24:29" (1/1) ... [2020-12-23 00:24:29,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:24:29" (1/1) ... [2020-12-23 00:24:29,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:24:29" (1/1) ... [2020-12-23 00:24:29,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:24:29,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:24:29,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:24:29,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:24:29,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:24:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:24:29,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:24:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:24:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:24:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:24:29,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:24:29,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:24:29,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:24:30,359 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:24:30,360 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-23 00:24:30,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:24:30 BoogieIcfgContainer [2020-12-23 00:24:30,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:24:30,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:24:30,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:24:30,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:24:30,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:24:28" (1/3) ... [2020-12-23 00:24:30,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20bd9e91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:24:30, skipping insertion in model container [2020-12-23 00:24:30,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:24:29" (2/3) ... [2020-12-23 00:24:30,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20bd9e91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:24:30, skipping insertion in model container [2020-12-23 00:24:30,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:24:30" (3/3) ... [2020-12-23 00:24:30,384 INFO L111 eAbstractionObserver]: Analyzing ICFG max40-1.i [2020-12-23 00:24:30,396 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:24:30,402 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:24:30,423 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:24:30,453 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:24:30,453 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:24:30,453 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:24:30,453 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:24:30,454 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:24:30,454 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:24:30,454 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:24:30,454 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:24:30,476 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-23 00:24:30,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:24:30,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:30,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:30,485 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:30,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:30,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1332003061, now seen corresponding path program 1 times [2020-12-23 00:24:30,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:30,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978585882] [2020-12-23 00:24:30,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:24:30,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978585882] [2020-12-23 00:24:30,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:24:30,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:24:30,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318856131] [2020-12-23 00:24:30,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:24:30,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:30,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:24:30,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:24:30,732 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-12-23 00:24:30,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:30,757 INFO L93 Difference]: Finished difference Result 62 states and 86 transitions. [2020-12-23 00:24:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:24:30,759 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-12-23 00:24:30,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:30,771 INFO L225 Difference]: With dead ends: 62 [2020-12-23 00:24:30,772 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 00:24:30,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:24:30,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 00:24:30,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-23 00:24:30,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 00:24:30,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-12-23 00:24:30,828 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2020-12-23 00:24:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:30,829 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-12-23 00:24:30,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:24:30,829 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-12-23 00:24:30,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:24:30,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:30,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:30,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:24:30,831 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:30,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:30,833 INFO L82 PathProgramCache]: Analyzing trace with hash 741944299, now seen corresponding path program 1 times [2020-12-23 00:24:30,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:30,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685750465] [2020-12-23 00:24:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:24:30,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685750465] [2020-12-23 00:24:30,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:24:30,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:24:30,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202608743] [2020-12-23 00:24:30,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:24:30,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:30,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:24:30,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:24:30,917 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 3 states. [2020-12-23 00:24:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:30,978 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2020-12-23 00:24:30,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:24:30,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 00:24:30,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:30,982 INFO L225 Difference]: With dead ends: 56 [2020-12-23 00:24:30,985 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 00:24:30,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:24:30,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 00:24:31,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-23 00:24:31,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:24:31,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-12-23 00:24:31,004 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2020-12-23 00:24:31,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:31,005 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-12-23 00:24:31,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:24:31,005 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-12-23 00:24:31,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:24:31,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:31,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:31,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:24:31,008 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:31,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:31,012 INFO L82 PathProgramCache]: Analyzing trace with hash -826131671, now seen corresponding path program 1 times [2020-12-23 00:24:31,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:31,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863155363] [2020-12-23 00:24:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:24:31,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863155363] [2020-12-23 00:24:31,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504249619] [2020-12-23 00:24:31,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:31,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:24:31,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:24:31,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:24:31,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:24:31,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534929505] [2020-12-23 00:24:31,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:24:31,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:31,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:24:31,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:24:31,301 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2020-12-23 00:24:31,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:31,391 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2020-12-23 00:24:31,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:24:31,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 00:24:31,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:31,394 INFO L225 Difference]: With dead ends: 62 [2020-12-23 00:24:31,394 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 00:24:31,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:24:31,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 00:24:31,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2020-12-23 00:24:31,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 00:24:31,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-12-23 00:24:31,402 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 19 [2020-12-23 00:24:31,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:31,403 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-12-23 00:24:31,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:24:31,403 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-12-23 00:24:31,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 00:24:31,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:31,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:31,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:24:31,621 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:31,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:31,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1925905852, now seen corresponding path program 1 times [2020-12-23 00:24:31,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:31,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537601317] [2020-12-23 00:24:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 00:24:31,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537601317] [2020-12-23 00:24:31,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554242676] [2020-12-23 00:24:31,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:31,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:24:31,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:24:31,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:24:31,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:24:31,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017614308] [2020-12-23 00:24:31,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:24:31,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:31,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:24:31,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:24:31,837 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 3 states. [2020-12-23 00:24:31,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:31,856 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-23 00:24:31,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:24:31,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-12-23 00:24:31,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:31,858 INFO L225 Difference]: With dead ends: 46 [2020-12-23 00:24:31,859 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 00:24:31,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:24:31,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 00:24:31,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-23 00:24:31,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:24:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-12-23 00:24:31,866 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 31 [2020-12-23 00:24:31,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:31,867 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-12-23 00:24:31,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:24:31,867 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-12-23 00:24:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 00:24:31,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:31,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:32,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:32,086 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:32,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:32,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1542894914, now seen corresponding path program 1 times [2020-12-23 00:24:32,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:32,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984636876] [2020-12-23 00:24:32,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:24:32,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984636876] [2020-12-23 00:24:32,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320389043] [2020-12-23 00:24:32,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:32,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:24:32,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:24:32,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:32,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:24:32,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804981315] [2020-12-23 00:24:32,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:24:32,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:32,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:24:32,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:24:32,483 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2020-12-23 00:24:32,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:32,540 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2020-12-23 00:24:32,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:24:32,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-12-23 00:24:32,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:32,541 INFO L225 Difference]: With dead ends: 66 [2020-12-23 00:24:32,542 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 00:24:32,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:24:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 00:24:32,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-23 00:24:32,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 00:24:32,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-12-23 00:24:32,557 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 33 [2020-12-23 00:24:32,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:32,557 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-12-23 00:24:32,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:24:32,558 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-12-23 00:24:32,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:24:32,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:32,559 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:32,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:32,776 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:32,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1235585152, now seen corresponding path program 2 times [2020-12-23 00:24:32,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:32,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67938308] [2020-12-23 00:24:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:24:32,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67938308] [2020-12-23 00:24:32,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991507163] [2020-12-23 00:24:32,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:32,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:24:32,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:32,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:24:32,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:24:33,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:33,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-23 00:24:33,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594934831] [2020-12-23 00:24:33,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:24:33,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:33,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:24:33,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:24:33,070 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 7 states. [2020-12-23 00:24:33,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:33,196 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2020-12-23 00:24:33,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:24:33,197 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-23 00:24:33,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:33,198 INFO L225 Difference]: With dead ends: 89 [2020-12-23 00:24:33,198 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 00:24:33,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:24:33,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 00:24:33,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-12-23 00:24:33,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 00:24:33,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-12-23 00:24:33,211 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 35 [2020-12-23 00:24:33,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:33,212 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-12-23 00:24:33,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:24:33,212 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-12-23 00:24:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 00:24:33,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:33,214 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:33,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:33,429 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:33,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:33,431 INFO L82 PathProgramCache]: Analyzing trace with hash 145959385, now seen corresponding path program 3 times [2020-12-23 00:24:33,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:33,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602559523] [2020-12-23 00:24:33,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 00:24:33,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602559523] [2020-12-23 00:24:33,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944929955] [2020-12-23 00:24:33,516 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:33,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:24:33,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:33,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:24:33,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 00:24:33,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:33,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:24:33,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751423672] [2020-12-23 00:24:33,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:24:33,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:33,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:24:33,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:24:33,685 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 5 states. [2020-12-23 00:24:33,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:33,708 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2020-12-23 00:24:33,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:24:33,709 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-12-23 00:24:33,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:33,710 INFO L225 Difference]: With dead ends: 68 [2020-12-23 00:24:33,710 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 00:24:33,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:24:33,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 00:24:33,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-23 00:24:33,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 00:24:33,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-12-23 00:24:33,719 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2020-12-23 00:24:33,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:33,719 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-12-23 00:24:33,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:24:33,719 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-12-23 00:24:33,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 00:24:33,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:33,721 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:33,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 00:24:33,935 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:33,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:33,936 INFO L82 PathProgramCache]: Analyzing trace with hash -523940009, now seen corresponding path program 4 times [2020-12-23 00:24:33,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:33,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973027829] [2020-12-23 00:24:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 00:24:34,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973027829] [2020-12-23 00:24:34,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518481087] [2020-12-23 00:24:34,105 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:34,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:24:34,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:34,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:24:34,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 00:24:34,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:34,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:24:34,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107355968] [2020-12-23 00:24:34,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:24:34,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:34,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:24:34,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:24:34,376 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 7 states. [2020-12-23 00:24:34,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:34,416 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2020-12-23 00:24:34,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:24:34,416 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-12-23 00:24:34,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:34,422 INFO L225 Difference]: With dead ends: 98 [2020-12-23 00:24:34,423 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 00:24:34,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:24:34,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 00:24:34,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-23 00:24:34,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 00:24:34,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-12-23 00:24:34,446 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 51 [2020-12-23 00:24:34,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:34,447 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-12-23 00:24:34,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:24:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-12-23 00:24:34,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 00:24:34,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:34,449 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:34,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:34,665 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:34,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:34,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1019809557, now seen corresponding path program 5 times [2020-12-23 00:24:34,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:34,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123400579] [2020-12-23 00:24:34,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 00:24:34,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123400579] [2020-12-23 00:24:34,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816645418] [2020-12-23 00:24:34,749 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:34,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 00:24:34,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:34,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:24:34,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-23 00:24:34,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:34,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-12-23 00:24:34,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548365755] [2020-12-23 00:24:34,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:24:34,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:34,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:24:34,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:24:34,949 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 10 states. [2020-12-23 00:24:35,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:35,002 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2020-12-23 00:24:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:24:35,004 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-12-23 00:24:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:35,004 INFO L225 Difference]: With dead ends: 103 [2020-12-23 00:24:35,004 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 00:24:35,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:24:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 00:24:35,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-12-23 00:24:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 00:24:35,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-12-23 00:24:35,012 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 53 [2020-12-23 00:24:35,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:35,012 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-12-23 00:24:35,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:24:35,012 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-12-23 00:24:35,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 00:24:35,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:35,014 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:35,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:35,229 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:35,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:35,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1753708975, now seen corresponding path program 6 times [2020-12-23 00:24:35,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:35,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806729995] [2020-12-23 00:24:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 00:24:35,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806729995] [2020-12-23 00:24:35,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588318436] [2020-12-23 00:24:35,403 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:35,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:24:35,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:35,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:24:35,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 00:24:35,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:35,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-12-23 00:24:35,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370397967] [2020-12-23 00:24:35,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:24:35,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:35,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:24:35,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:24:35,713 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 11 states. [2020-12-23 00:24:35,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:35,863 INFO L93 Difference]: Finished difference Result 127 states and 156 transitions. [2020-12-23 00:24:35,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:24:35,864 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-12-23 00:24:35,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:35,865 INFO L225 Difference]: With dead ends: 127 [2020-12-23 00:24:35,865 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 00:24:35,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:24:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 00:24:35,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2020-12-23 00:24:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 00:24:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-12-23 00:24:35,894 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 57 [2020-12-23 00:24:35,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:35,895 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-12-23 00:24:35,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:24:35,895 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-12-23 00:24:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 00:24:35,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:35,901 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:36,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:24:36,117 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:36,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:36,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1901797290, now seen corresponding path program 7 times [2020-12-23 00:24:36,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:36,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232316624] [2020-12-23 00:24:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-23 00:24:36,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232316624] [2020-12-23 00:24:36,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126723989] [2020-12-23 00:24:36,239 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:36,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:24:36,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-23 00:24:36,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:36,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:24:36,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054751314] [2020-12-23 00:24:36,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:24:36,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:36,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:24:36,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:24:36,482 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 10 states. [2020-12-23 00:24:36,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:36,522 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2020-12-23 00:24:36,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:24:36,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-12-23 00:24:36,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:36,525 INFO L225 Difference]: With dead ends: 132 [2020-12-23 00:24:36,525 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 00:24:36,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:24:36,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 00:24:36,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-23 00:24:36,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 00:24:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-12-23 00:24:36,546 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 71 [2020-12-23 00:24:36,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:36,546 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-12-23 00:24:36,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:24:36,546 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-12-23 00:24:36,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 00:24:36,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:36,551 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:36,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:36,770 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:36,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:36,771 INFO L82 PathProgramCache]: Analyzing trace with hash 646943848, now seen corresponding path program 8 times [2020-12-23 00:24:36,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:36,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30179075] [2020-12-23 00:24:36,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-23 00:24:36,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30179075] [2020-12-23 00:24:36,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893175971] [2020-12-23 00:24:36,888 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:37,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:24:37,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:37,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:24:37,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-23 00:24:37,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:37,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:24:37,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371052562] [2020-12-23 00:24:37,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:24:37,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:37,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:24:37,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:24:37,096 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 11 states. [2020-12-23 00:24:37,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:37,138 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2020-12-23 00:24:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:24:37,139 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 73 [2020-12-23 00:24:37,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:37,141 INFO L225 Difference]: With dead ends: 134 [2020-12-23 00:24:37,141 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 00:24:37,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:24:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 00:24:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-12-23 00:24:37,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 00:24:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2020-12-23 00:24:37,154 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 73 [2020-12-23 00:24:37,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:37,154 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2020-12-23 00:24:37,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:24:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2020-12-23 00:24:37,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 00:24:37,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:37,156 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:37,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:37,370 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:37,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:37,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1618596262, now seen corresponding path program 9 times [2020-12-23 00:24:37,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:37,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824216108] [2020-12-23 00:24:37,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-23 00:24:37,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824216108] [2020-12-23 00:24:37,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732116507] [2020-12-23 00:24:37,515 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:37,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:24:37,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:37,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:24:37,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-12-23 00:24:37,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:37,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2020-12-23 00:24:37,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483348827] [2020-12-23 00:24:37,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:24:37,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:37,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:24:37,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:24:37,949 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 15 states. [2020-12-23 00:24:38,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:38,162 INFO L93 Difference]: Finished difference Result 157 states and 192 transitions. [2020-12-23 00:24:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:24:38,163 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2020-12-23 00:24:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:38,164 INFO L225 Difference]: With dead ends: 157 [2020-12-23 00:24:38,165 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 00:24:38,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:24:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 00:24:38,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2020-12-23 00:24:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 00:24:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2020-12-23 00:24:38,181 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 75 [2020-12-23 00:24:38,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:38,185 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2020-12-23 00:24:38,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:24:38,185 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2020-12-23 00:24:38,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:24:38,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:38,190 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:38,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:24:38,391 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:38,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:38,393 INFO L82 PathProgramCache]: Analyzing trace with hash 92897279, now seen corresponding path program 10 times [2020-12-23 00:24:38,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:38,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298634552] [2020-12-23 00:24:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-23 00:24:38,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298634552] [2020-12-23 00:24:38,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660975742] [2020-12-23 00:24:38,557 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:38,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:24:38,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:38,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:24:38,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-23 00:24:38,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:38,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:24:38,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322484929] [2020-12-23 00:24:38,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:24:38,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:38,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:24:38,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:24:38,773 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand 13 states. [2020-12-23 00:24:38,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:38,815 INFO L93 Difference]: Finished difference Result 162 states and 194 transitions. [2020-12-23 00:24:38,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:24:38,816 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 89 [2020-12-23 00:24:38,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:38,817 INFO L225 Difference]: With dead ends: 162 [2020-12-23 00:24:38,817 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 00:24:38,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:24:38,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 00:24:38,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-23 00:24:38,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 00:24:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2020-12-23 00:24:38,823 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 89 [2020-12-23 00:24:38,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:38,823 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2020-12-23 00:24:38,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:24:38,823 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2020-12-23 00:24:38,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 00:24:38,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:38,824 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:39,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:24:39,035 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:39,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:39,036 INFO L82 PathProgramCache]: Analyzing trace with hash 779977021, now seen corresponding path program 11 times [2020-12-23 00:24:39,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:39,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413418156] [2020-12-23 00:24:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:39,206 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-23 00:24:39,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413418156] [2020-12-23 00:24:39,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556464352] [2020-12-23 00:24:39,207 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:39,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 00:24:39,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:39,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:24:39,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-12-23 00:24:39,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:39,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2020-12-23 00:24:39,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175144463] [2020-12-23 00:24:39,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:24:39,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:39,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:24:39,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:24:39,637 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 17 states. [2020-12-23 00:24:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:39,736 INFO L93 Difference]: Finished difference Result 167 states and 200 transitions. [2020-12-23 00:24:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:24:39,736 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-12-23 00:24:39,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:39,737 INFO L225 Difference]: With dead ends: 167 [2020-12-23 00:24:39,737 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 00:24:39,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:24:39,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 00:24:39,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-12-23 00:24:39,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 00:24:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2020-12-23 00:24:39,743 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 91 [2020-12-23 00:24:39,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:39,743 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2020-12-23 00:24:39,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:24:39,743 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2020-12-23 00:24:39,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-23 00:24:39,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:39,744 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:39,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:24:39,959 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:39,960 INFO L82 PathProgramCache]: Analyzing trace with hash -105056391, now seen corresponding path program 12 times [2020-12-23 00:24:39,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:39,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246219844] [2020-12-23 00:24:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:24:40,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246219844] [2020-12-23 00:24:40,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344539353] [2020-12-23 00:24:40,191 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:41,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:24:41,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:41,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:24:41,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2020-12-23 00:24:41,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:41,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2020-12-23 00:24:41,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680841921] [2020-12-23 00:24:41,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:24:41,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:41,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:24:41,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:24:41,329 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand 19 states. [2020-12-23 00:24:41,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:41,451 INFO L93 Difference]: Finished difference Result 173 states and 206 transitions. [2020-12-23 00:24:41,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:24:41,452 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 95 [2020-12-23 00:24:41,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:41,453 INFO L225 Difference]: With dead ends: 173 [2020-12-23 00:24:41,453 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 00:24:41,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:24:41,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 00:24:41,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-12-23 00:24:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 00:24:41,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2020-12-23 00:24:41,459 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 95 [2020-12-23 00:24:41,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:41,459 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2020-12-23 00:24:41,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:24:41,459 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2020-12-23 00:24:41,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 00:24:41,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:41,460 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:41,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:41,676 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:41,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:41,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1954054069, now seen corresponding path program 13 times [2020-12-23 00:24:41,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:41,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088851802] [2020-12-23 00:24:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 00:24:41,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088851802] [2020-12-23 00:24:41,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894944783] [2020-12-23 00:24:41,861 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:41,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:24:41,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 00:24:42,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:42,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 00:24:42,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234940786] [2020-12-23 00:24:42,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:24:42,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:42,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:24:42,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:24:42,108 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand 16 states. [2020-12-23 00:24:42,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:42,175 INFO L93 Difference]: Finished difference Result 176 states and 208 transitions. [2020-12-23 00:24:42,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:24:42,176 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-12-23 00:24:42,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:42,177 INFO L225 Difference]: With dead ends: 176 [2020-12-23 00:24:42,177 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 00:24:42,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:24:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 00:24:42,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-12-23 00:24:42,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 00:24:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2020-12-23 00:24:42,183 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 99 [2020-12-23 00:24:42,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:42,183 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2020-12-23 00:24:42,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:24:42,183 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2020-12-23 00:24:42,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 00:24:42,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:42,184 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:42,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:24:42,398 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:42,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:42,399 INFO L82 PathProgramCache]: Analyzing trace with hash -259880077, now seen corresponding path program 14 times [2020-12-23 00:24:42,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:42,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613200325] [2020-12-23 00:24:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 00:24:42,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613200325] [2020-12-23 00:24:42,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526592238] [2020-12-23 00:24:42,624 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:42,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:24:42,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:42,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:24:42,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 00:24:42,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:42,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 00:24:42,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238821806] [2020-12-23 00:24:42,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:24:42,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:42,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:24:42,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:24:42,877 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand 17 states. [2020-12-23 00:24:42,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:42,933 INFO L93 Difference]: Finished difference Result 178 states and 210 transitions. [2020-12-23 00:24:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:24:42,933 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2020-12-23 00:24:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:42,934 INFO L225 Difference]: With dead ends: 178 [2020-12-23 00:24:42,934 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 00:24:42,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:24:42,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 00:24:42,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-12-23 00:24:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 00:24:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-12-23 00:24:42,942 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 101 [2020-12-23 00:24:42,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:42,942 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-12-23 00:24:42,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:24:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-12-23 00:24:42,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 00:24:42,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:42,944 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:43,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:24:43,158 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:43,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:43,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1841782863, now seen corresponding path program 15 times [2020-12-23 00:24:43,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:43,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640023845] [2020-12-23 00:24:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 00:24:43,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640023845] [2020-12-23 00:24:43,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782488382] [2020-12-23 00:24:43,392 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 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 [2020-12-23 00:24:43,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:24:43,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:43,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:24:43,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2020-12-23 00:24:43,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:43,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2020-12-23 00:24:43,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754240477] [2020-12-23 00:24:43,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:24:43,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:43,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:24:43,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:24:43,960 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 22 states. [2020-12-23 00:24:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:44,197 INFO L93 Difference]: Finished difference Result 201 states and 242 transitions. [2020-12-23 00:24:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:24:44,197 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 103 [2020-12-23 00:24:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:44,198 INFO L225 Difference]: With dead ends: 201 [2020-12-23 00:24:44,199 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 00:24:44,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:24:44,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 00:24:44,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2020-12-23 00:24:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 00:24:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 137 transitions. [2020-12-23 00:24:44,204 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 137 transitions. Word has length 103 [2020-12-23 00:24:44,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:44,205 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 137 transitions. [2020-12-23 00:24:44,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:24:44,205 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 137 transitions. [2020-12-23 00:24:44,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-23 00:24:44,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:44,206 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:44,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:44,421 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:44,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:44,422 INFO L82 PathProgramCache]: Analyzing trace with hash 868849802, now seen corresponding path program 16 times [2020-12-23 00:24:44,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:44,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660742007] [2020-12-23 00:24:44,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-12-23 00:24:44,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660742007] [2020-12-23 00:24:44,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023549464] [2020-12-23 00:24:44,652 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:44,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:24:44,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:44,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:24:44,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-12-23 00:24:44,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:44,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 00:24:44,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295737576] [2020-12-23 00:24:44,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:24:44,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:44,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:24:44,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:24:44,996 INFO L87 Difference]: Start difference. First operand 118 states and 137 transitions. Second operand 19 states. [2020-12-23 00:24:45,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:45,063 INFO L93 Difference]: Finished difference Result 206 states and 244 transitions. [2020-12-23 00:24:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:24:45,063 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 117 [2020-12-23 00:24:45,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:45,064 INFO L225 Difference]: With dead ends: 206 [2020-12-23 00:24:45,064 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 00:24:45,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:24:45,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 00:24:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-12-23 00:24:45,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 00:24:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2020-12-23 00:24:45,070 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 117 [2020-12-23 00:24:45,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:45,071 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2020-12-23 00:24:45,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:24:45,071 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2020-12-23 00:24:45,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 00:24:45,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:45,072 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:45,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:45,287 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:45,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:45,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2012967112, now seen corresponding path program 17 times [2020-12-23 00:24:45,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:45,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230163971] [2020-12-23 00:24:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-12-23 00:24:45,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230163971] [2020-12-23 00:24:45,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745991960] [2020-12-23 00:24:45,546 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:46,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-23 00:24:46,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:46,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:24:46,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-12-23 00:24:46,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:46,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:24:46,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192860825] [2020-12-23 00:24:46,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:24:46,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:46,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:24:46,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:24:46,523 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand 20 states. [2020-12-23 00:24:46,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:46,594 INFO L93 Difference]: Finished difference Result 208 states and 246 transitions. [2020-12-23 00:24:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:24:46,595 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-12-23 00:24:46,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:46,596 INFO L225 Difference]: With dead ends: 208 [2020-12-23 00:24:46,596 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 00:24:46,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:24:46,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 00:24:46,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-12-23 00:24:46,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-23 00:24:46,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2020-12-23 00:24:46,601 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 119 [2020-12-23 00:24:46,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:46,602 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2020-12-23 00:24:46,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:24:46,602 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2020-12-23 00:24:46,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-23 00:24:46,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:46,603 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:46,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:46,817 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:46,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:46,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1998074246, now seen corresponding path program 18 times [2020-12-23 00:24:46,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:46,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206260607] [2020-12-23 00:24:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-12-23 00:24:47,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206260607] [2020-12-23 00:24:47,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418581271] [2020-12-23 00:24:47,090 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:47,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 00:24:47,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:47,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:24:47,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2020-12-23 00:24:48,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:48,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2020-12-23 00:24:48,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113444143] [2020-12-23 00:24:48,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:24:48,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:48,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:24:48,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:24:48,104 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand 26 states. [2020-12-23 00:24:48,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:48,371 INFO L93 Difference]: Finished difference Result 231 states and 278 transitions. [2020-12-23 00:24:48,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:24:48,375 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 121 [2020-12-23 00:24:48,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:48,376 INFO L225 Difference]: With dead ends: 231 [2020-12-23 00:24:48,376 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 00:24:48,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:24:48,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 00:24:48,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2020-12-23 00:24:48,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 00:24:48,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 158 transitions. [2020-12-23 00:24:48,381 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 158 transitions. Word has length 121 [2020-12-23 00:24:48,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:48,382 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 158 transitions. [2020-12-23 00:24:48,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:24:48,382 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 158 transitions. [2020-12-23 00:24:48,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 00:24:48,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:48,384 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:48,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:24:48,599 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:48,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:48,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1951654049, now seen corresponding path program 19 times [2020-12-23 00:24:48,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:48,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108578745] [2020-12-23 00:24:48,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-12-23 00:24:48,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108578745] [2020-12-23 00:24:48,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863794358] [2020-12-23 00:24:48,897 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:49,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:24:49,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-12-23 00:24:49,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:49,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 00:24:49,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717683185] [2020-12-23 00:24:49,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:24:49,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:49,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:24:49,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:24:49,213 INFO L87 Difference]: Start difference. First operand 136 states and 158 transitions. Second operand 22 states. [2020-12-23 00:24:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:49,281 INFO L93 Difference]: Finished difference Result 236 states and 280 transitions. [2020-12-23 00:24:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:24:49,282 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 135 [2020-12-23 00:24:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:49,283 INFO L225 Difference]: With dead ends: 236 [2020-12-23 00:24:49,283 INFO L226 Difference]: Without dead ends: 139 [2020-12-23 00:24:49,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:24:49,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-23 00:24:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-12-23 00:24:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-23 00:24:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2020-12-23 00:24:49,288 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 135 [2020-12-23 00:24:49,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:49,288 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2020-12-23 00:24:49,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:24:49,289 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2020-12-23 00:24:49,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-23 00:24:49,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:49,290 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:49,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:24:49,506 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:49,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:49,507 INFO L82 PathProgramCache]: Analyzing trace with hash 391881757, now seen corresponding path program 20 times [2020-12-23 00:24:49,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:49,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905508676] [2020-12-23 00:24:49,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-12-23 00:24:49,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905508676] [2020-12-23 00:24:49,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660578684] [2020-12-23 00:24:49,842 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:49,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:24:49,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:49,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:24:49,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-12-23 00:24:50,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:50,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 00:24:50,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105473578] [2020-12-23 00:24:50,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:24:50,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:50,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:24:50,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:24:50,179 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 23 states. [2020-12-23 00:24:50,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:50,256 INFO L93 Difference]: Finished difference Result 238 states and 282 transitions. [2020-12-23 00:24:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:24:50,257 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 137 [2020-12-23 00:24:50,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:50,258 INFO L225 Difference]: With dead ends: 238 [2020-12-23 00:24:50,258 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 00:24:50,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:24:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 00:24:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-12-23 00:24:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-23 00:24:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2020-12-23 00:24:50,264 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 137 [2020-12-23 00:24:50,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:50,264 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2020-12-23 00:24:50,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:24:50,265 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2020-12-23 00:24:50,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-23 00:24:50,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:50,267 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:50,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:50,474 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:50,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:50,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1966928219, now seen corresponding path program 21 times [2020-12-23 00:24:50,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:50,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729713642] [2020-12-23 00:24:50,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-12-23 00:24:50,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729713642] [2020-12-23 00:24:50,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75822873] [2020-12-23 00:24:50,847 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:51,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:24:51,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:51,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:24:51,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2020-12-23 00:24:51,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:51,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2020-12-23 00:24:51,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994307450] [2020-12-23 00:24:51,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:24:51,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:51,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:24:51,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:24:51,440 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand 29 states. [2020-12-23 00:24:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:51,610 INFO L93 Difference]: Finished difference Result 243 states and 288 transitions. [2020-12-23 00:24:51,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 00:24:51,610 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 139 [2020-12-23 00:24:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:51,612 INFO L225 Difference]: With dead ends: 243 [2020-12-23 00:24:51,612 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 00:24:51,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:24:51,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 00:24:51,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2020-12-23 00:24:51,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-23 00:24:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 166 transitions. [2020-12-23 00:24:51,632 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 166 transitions. Word has length 139 [2020-12-23 00:24:51,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:51,632 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 166 transitions. [2020-12-23 00:24:51,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:24:51,632 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 166 transitions. [2020-12-23 00:24:51,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-23 00:24:51,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:51,634 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:51,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 00:24:51,849 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:51,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:51,850 INFO L82 PathProgramCache]: Analyzing trace with hash 177802135, now seen corresponding path program 22 times [2020-12-23 00:24:51,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:51,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425528869] [2020-12-23 00:24:51,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-23 00:24:52,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425528869] [2020-12-23 00:24:52,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650321774] [2020-12-23 00:24:52,268 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:52,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:24:52,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:52,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:24:52,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-23 00:24:52,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:52,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 00:24:52,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655630469] [2020-12-23 00:24:52,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 00:24:52,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:52,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 00:24:52,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:24:52,574 INFO L87 Difference]: Start difference. First operand 144 states and 166 transitions. Second operand 25 states. [2020-12-23 00:24:52,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:52,668 INFO L93 Difference]: Finished difference Result 246 states and 290 transitions. [2020-12-23 00:24:52,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:24:52,669 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 143 [2020-12-23 00:24:52,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:52,670 INFO L225 Difference]: With dead ends: 246 [2020-12-23 00:24:52,671 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 00:24:52,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:24:52,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 00:24:52,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-12-23 00:24:52,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-23 00:24:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 168 transitions. [2020-12-23 00:24:52,676 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 168 transitions. Word has length 143 [2020-12-23 00:24:52,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:52,677 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 168 transitions. [2020-12-23 00:24:52,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 00:24:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 168 transitions. [2020-12-23 00:24:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-23 00:24:52,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:52,679 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:52,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:52,893 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:52,894 INFO L82 PathProgramCache]: Analyzing trace with hash -884018603, now seen corresponding path program 23 times [2020-12-23 00:24:52,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:52,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740234076] [2020-12-23 00:24:52,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-23 00:24:53,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740234076] [2020-12-23 00:24:53,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572131681] [2020-12-23 00:24:53,370 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:55,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-23 00:24:55,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:55,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:24:55,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2020-12-23 00:24:55,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:55,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2020-12-23 00:24:55,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507665596] [2020-12-23 00:24:55,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:24:55,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:55,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:24:55,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:24:55,599 INFO L87 Difference]: Start difference. First operand 146 states and 168 transitions. Second operand 32 states. [2020-12-23 00:24:55,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:55,985 INFO L93 Difference]: Finished difference Result 269 states and 322 transitions. [2020-12-23 00:24:55,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:24:55,986 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 145 [2020-12-23 00:24:55,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:55,987 INFO L225 Difference]: With dead ends: 269 [2020-12-23 00:24:55,988 INFO L226 Difference]: Without dead ends: 170 [2020-12-23 00:24:55,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:24:55,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-23 00:24:55,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2020-12-23 00:24:55,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-23 00:24:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 185 transitions. [2020-12-23 00:24:55,994 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 185 transitions. Word has length 145 [2020-12-23 00:24:55,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:55,995 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 185 transitions. [2020-12-23 00:24:55,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:24:55,995 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 185 transitions. [2020-12-23 00:24:55,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-23 00:24:55,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:55,996 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:56,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:24:56,210 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:56,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:56,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2042535342, now seen corresponding path program 24 times [2020-12-23 00:24:56,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:56,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779824142] [2020-12-23 00:24:56,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2020-12-23 00:24:56,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779824142] [2020-12-23 00:24:56,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811489121] [2020-12-23 00:24:56,701 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:57,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 00:24:57,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:24:57,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:24:57,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2020-12-23 00:24:57,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:57,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2020-12-23 00:24:57,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467590912] [2020-12-23 00:24:57,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 00:24:57,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:57,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 00:24:57,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:24:57,944 INFO L87 Difference]: Start difference. First operand 160 states and 185 transitions. Second operand 33 states. [2020-12-23 00:24:58,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:58,091 INFO L93 Difference]: Finished difference Result 277 states and 328 transitions. [2020-12-23 00:24:58,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 00:24:58,093 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 159 [2020-12-23 00:24:58,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:58,095 INFO L225 Difference]: With dead ends: 277 [2020-12-23 00:24:58,095 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 00:24:58,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:24:58,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 00:24:58,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-12-23 00:24:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 00:24:58,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2020-12-23 00:24:58,100 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 159 [2020-12-23 00:24:58,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:58,101 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2020-12-23 00:24:58,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 00:24:58,101 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2020-12-23 00:24:58,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-23 00:24:58,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:58,102 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:58,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:24:58,318 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:58,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:58,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2098595818, now seen corresponding path program 25 times [2020-12-23 00:24:58,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:58,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095776363] [2020-12-23 00:24:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-12-23 00:24:58,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095776363] [2020-12-23 00:24:58,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817754984] [2020-12-23 00:24:58,839 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:24:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:58,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:24:59,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:24:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-12-23 00:24:59,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:24:59,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 00:24:59,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041628905] [2020-12-23 00:24:59,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:24:59,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:24:59,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:24:59,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:24:59,168 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand 28 states. [2020-12-23 00:24:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:24:59,282 INFO L93 Difference]: Finished difference Result 280 states and 330 transitions. [2020-12-23 00:24:59,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:24:59,283 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 163 [2020-12-23 00:24:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:24:59,284 INFO L225 Difference]: With dead ends: 280 [2020-12-23 00:24:59,284 INFO L226 Difference]: Without dead ends: 167 [2020-12-23 00:24:59,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:24:59,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-23 00:24:59,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-12-23 00:24:59,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-23 00:24:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 191 transitions. [2020-12-23 00:24:59,289 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 191 transitions. Word has length 163 [2020-12-23 00:24:59,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:24:59,290 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 191 transitions. [2020-12-23 00:24:59,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:24:59,290 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 191 transitions. [2020-12-23 00:24:59,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-23 00:24:59,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:24:59,291 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:24:59,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:24:59,505 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:24:59,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:24:59,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1755110488, now seen corresponding path program 26 times [2020-12-23 00:24:59,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:24:59,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109169879] [2020-12-23 00:24:59,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:24:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-12-23 00:25:00,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109169879] [2020-12-23 00:25:00,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885877826] [2020-12-23 00:25:00,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:00,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:00,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:00,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:25:00,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-12-23 00:25:00,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:00,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 00:25:00,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870432162] [2020-12-23 00:25:00,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:25:00,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:00,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:25:00,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:25:00,467 INFO L87 Difference]: Start difference. First operand 166 states and 191 transitions. Second operand 29 states. [2020-12-23 00:25:00,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:00,576 INFO L93 Difference]: Finished difference Result 282 states and 332 transitions. [2020-12-23 00:25:00,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:25:00,576 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 165 [2020-12-23 00:25:00,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:00,578 INFO L225 Difference]: With dead ends: 282 [2020-12-23 00:25:00,578 INFO L226 Difference]: Without dead ends: 169 [2020-12-23 00:25:00,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:25:00,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-23 00:25:00,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2020-12-23 00:25:00,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-12-23 00:25:00,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 193 transitions. [2020-12-23 00:25:00,586 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 193 transitions. Word has length 165 [2020-12-23 00:25:00,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:00,586 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 193 transitions. [2020-12-23 00:25:00,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:25:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 193 transitions. [2020-12-23 00:25:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-23 00:25:00,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:00,591 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:00,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:00,805 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:00,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:00,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1389905894, now seen corresponding path program 27 times [2020-12-23 00:25:00,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:00,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403475618] [2020-12-23 00:25:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-12-23 00:25:01,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403475618] [2020-12-23 00:25:01,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570322921] [2020-12-23 00:25:01,376 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:01,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 00:25:01,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:01,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 00:25:01,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:01,920 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 00:25:01,922 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:25:01,928 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:25:01,930 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:25:01,931 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-12-23 00:25:02,249 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:25:02,249 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2020-12-23 00:25:02,251 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:25:02,261 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:25:02,262 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:25:02,263 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:18 [2020-12-23 00:25:02,455 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:25:02,455 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2020-12-23 00:25:02,457 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:25:02,461 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:25:02,462 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:25:02,462 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2020-12-23 00:25:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 34 proven. 38 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2020-12-23 00:25:02,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:02,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 14] total 41 [2020-12-23 00:25:02,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724080631] [2020-12-23 00:25:02,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:25:02,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:02,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:25:02,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:25:02,594 INFO L87 Difference]: Start difference. First operand 168 states and 193 transitions. Second operand 41 states. [2020-12-23 00:25:04,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:04,936 INFO L93 Difference]: Finished difference Result 387 states and 459 transitions. [2020-12-23 00:25:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:25:04,937 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 167 [2020-12-23 00:25:04,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:04,938 INFO L225 Difference]: With dead ends: 387 [2020-12-23 00:25:04,938 INFO L226 Difference]: Without dead ends: 274 [2020-12-23 00:25:04,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1297, Invalid=4253, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 00:25:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-12-23 00:25:04,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 205. [2020-12-23 00:25:04,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-12-23 00:25:04,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 238 transitions. [2020-12-23 00:25:04,950 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 238 transitions. Word has length 167 [2020-12-23 00:25:04,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:04,951 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 238 transitions. [2020-12-23 00:25:04,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:25:04,951 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 238 transitions. [2020-12-23 00:25:04,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-23 00:25:04,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:04,952 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:05,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 00:25:05,165 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:05,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:05,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1827777062, now seen corresponding path program 1 times [2020-12-23 00:25:05,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:05,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522622113] [2020-12-23 00:25:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-12-23 00:25:05,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522622113] [2020-12-23 00:25:05,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440226429] [2020-12-23 00:25:05,789 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:05,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 00:25:05,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-12-23 00:25:06,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:06,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 00:25:06,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170543047] [2020-12-23 00:25:06,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:25:06,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:06,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:25:06,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:25:06,182 INFO L87 Difference]: Start difference. First operand 205 states and 238 transitions. Second operand 31 states. [2020-12-23 00:25:06,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:06,312 INFO L93 Difference]: Finished difference Result 356 states and 422 transitions. [2020-12-23 00:25:06,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:25:06,314 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 169 [2020-12-23 00:25:06,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:06,316 INFO L225 Difference]: With dead ends: 356 [2020-12-23 00:25:06,316 INFO L226 Difference]: Without dead ends: 208 [2020-12-23 00:25:06,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:25:06,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-23 00:25:06,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2020-12-23 00:25:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-23 00:25:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 240 transitions. [2020-12-23 00:25:06,326 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 240 transitions. Word has length 169 [2020-12-23 00:25:06,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:06,326 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 240 transitions. [2020-12-23 00:25:06,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:25:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 240 transitions. [2020-12-23 00:25:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-23 00:25:06,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:06,328 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:06,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:06,542 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:06,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:06,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1688108900, now seen corresponding path program 2 times [2020-12-23 00:25:06,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:06,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218206766] [2020-12-23 00:25:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-12-23 00:25:07,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218206766] [2020-12-23 00:25:07,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649449790] [2020-12-23 00:25:07,182 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:07,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:07,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:07,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 00:25:07,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-12-23 00:25:07,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:07,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 00:25:07,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292403935] [2020-12-23 00:25:07,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:25:07,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:07,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:25:07,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:25:07,522 INFO L87 Difference]: Start difference. First operand 207 states and 240 transitions. Second operand 32 states. [2020-12-23 00:25:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:07,648 INFO L93 Difference]: Finished difference Result 358 states and 424 transitions. [2020-12-23 00:25:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 00:25:07,649 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 171 [2020-12-23 00:25:07,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:07,650 INFO L225 Difference]: With dead ends: 358 [2020-12-23 00:25:07,650 INFO L226 Difference]: Without dead ends: 210 [2020-12-23 00:25:07,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:25:07,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-23 00:25:07,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2020-12-23 00:25:07,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-23 00:25:07,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 242 transitions. [2020-12-23 00:25:07,658 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 242 transitions. Word has length 171 [2020-12-23 00:25:07,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:07,659 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 242 transitions. [2020-12-23 00:25:07,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:25:07,659 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 242 transitions. [2020-12-23 00:25:07,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-23 00:25:07,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:07,660 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:07,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 00:25:07,874 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:07,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:07,875 INFO L82 PathProgramCache]: Analyzing trace with hash 610991394, now seen corresponding path program 3 times [2020-12-23 00:25:07,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:07,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309862833] [2020-12-23 00:25:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-12-23 00:25:08,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309862833] [2020-12-23 00:25:08,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545272712] [2020-12-23 00:25:08,578 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:09,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:25:09,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:09,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:25:09,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1114 trivial. 0 not checked. [2020-12-23 00:25:09,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:09,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 10] total 40 [2020-12-23 00:25:09,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195861081] [2020-12-23 00:25:09,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:25:09,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:09,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:25:09,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=1020, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:25:09,713 INFO L87 Difference]: Start difference. First operand 209 states and 242 transitions. Second operand 40 states. [2020-12-23 00:25:09,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:09,935 INFO L93 Difference]: Finished difference Result 363 states and 430 transitions. [2020-12-23 00:25:09,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:25:09,939 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 173 [2020-12-23 00:25:09,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:09,941 INFO L225 Difference]: With dead ends: 363 [2020-12-23 00:25:09,941 INFO L226 Difference]: Without dead ends: 215 [2020-12-23 00:25:09,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=540, Invalid=1020, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:25:09,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-12-23 00:25:09,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2020-12-23 00:25:09,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-23 00:25:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 246 transitions. [2020-12-23 00:25:09,950 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 246 transitions. Word has length 173 [2020-12-23 00:25:09,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:09,950 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 246 transitions. [2020-12-23 00:25:09,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:25:09,950 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 246 transitions. [2020-12-23 00:25:09,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-12-23 00:25:09,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:09,951 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:10,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 00:25:10,166 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:10,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:10,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2116474334, now seen corresponding path program 4 times [2020-12-23 00:25:10,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:10,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410828805] [2020-12-23 00:25:10,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2020-12-23 00:25:10,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410828805] [2020-12-23 00:25:10,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796202033] [2020-12-23 00:25:10,845 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:11,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:25:11,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:11,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 00:25:11,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2020-12-23 00:25:11,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:11,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 00:25:11,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281763090] [2020-12-23 00:25:11,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:25:11,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:11,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:25:11,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:25:11,223 INFO L87 Difference]: Start difference. First operand 213 states and 246 transitions. Second operand 34 states. [2020-12-23 00:25:11,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:11,373 INFO L93 Difference]: Finished difference Result 366 states and 432 transitions. [2020-12-23 00:25:11,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 00:25:11,374 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 177 [2020-12-23 00:25:11,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:11,375 INFO L225 Difference]: With dead ends: 366 [2020-12-23 00:25:11,376 INFO L226 Difference]: Without dead ends: 216 [2020-12-23 00:25:11,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:25:11,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-23 00:25:11,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2020-12-23 00:25:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-23 00:25:11,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 248 transitions. [2020-12-23 00:25:11,384 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 248 transitions. Word has length 177 [2020-12-23 00:25:11,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:11,384 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 248 transitions. [2020-12-23 00:25:11,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:25:11,384 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 248 transitions. [2020-12-23 00:25:11,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-12-23 00:25:11,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:11,386 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:11,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 00:25:11,602 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:11,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:11,603 INFO L82 PathProgramCache]: Analyzing trace with hash -490631908, now seen corresponding path program 5 times [2020-12-23 00:25:11,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:11,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132223897] [2020-12-23 00:25:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2020-12-23 00:25:12,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132223897] [2020-12-23 00:25:12,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291548536] [2020-12-23 00:25:12,381 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:44,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2020-12-23 00:25:44,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:44,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:25:44,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2020-12-23 00:25:44,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:44,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 10] total 42 [2020-12-23 00:25:44,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314939216] [2020-12-23 00:25:44,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 00:25:44,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:44,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 00:25:44,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=1117, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:25:44,654 INFO L87 Difference]: Start difference. First operand 215 states and 248 transitions. Second operand 42 states. [2020-12-23 00:25:45,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:45,166 INFO L93 Difference]: Finished difference Result 396 states and 474 transitions. [2020-12-23 00:25:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:25:45,166 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 179 [2020-12-23 00:25:45,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:45,168 INFO L225 Difference]: With dead ends: 396 [2020-12-23 00:25:45,168 INFO L226 Difference]: Without dead ends: 246 [2020-12-23 00:25:45,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=1117, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:25:45,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-23 00:25:45,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 233. [2020-12-23 00:25:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-12-23 00:25:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 270 transitions. [2020-12-23 00:25:45,177 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 270 transitions. Word has length 179 [2020-12-23 00:25:45,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:45,177 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 270 transitions. [2020-12-23 00:25:45,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 00:25:45,178 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 270 transitions. [2020-12-23 00:25:45,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-12-23 00:25:45,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:45,179 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:45,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 00:25:45,394 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:45,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:45,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1882803339, now seen corresponding path program 6 times [2020-12-23 00:25:45,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:45,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570704605] [2020-12-23 00:25:45,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2020-12-23 00:25:46,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570704605] [2020-12-23 00:25:46,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050450764] [2020-12-23 00:25:46,179 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:48,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 00:25:48,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:48,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:25:48,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1328 trivial. 0 not checked. [2020-12-23 00:25:48,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:48,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 11] total 44 [2020-12-23 00:25:48,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073162359] [2020-12-23 00:25:48,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 00:25:48,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:48,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 00:25:48,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1243, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:25:48,690 INFO L87 Difference]: Start difference. First operand 233 states and 270 transitions. Second operand 44 states. [2020-12-23 00:25:49,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:49,229 INFO L93 Difference]: Finished difference Result 430 states and 516 transitions. [2020-12-23 00:25:49,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 00:25:49,230 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 193 [2020-12-23 00:25:49,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:49,231 INFO L225 Difference]: With dead ends: 430 [2020-12-23 00:25:49,231 INFO L226 Difference]: Without dead ends: 264 [2020-12-23 00:25:49,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=649, Invalid=1243, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:25:49,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-23 00:25:49,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 251. [2020-12-23 00:25:49,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-12-23 00:25:49,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 292 transitions. [2020-12-23 00:25:49,241 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 292 transitions. Word has length 193 [2020-12-23 00:25:49,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:49,241 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 292 transitions. [2020-12-23 00:25:49,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 00:25:49,241 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 292 transitions. [2020-12-23 00:25:49,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-12-23 00:25:49,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:49,243 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:49,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 00:25:49,456 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:49,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:49,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1473902542, now seen corresponding path program 7 times [2020-12-23 00:25:49,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:49,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774114717] [2020-12-23 00:25:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1612 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2020-12-23 00:25:50,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774114717] [2020-12-23 00:25:50,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93556588] [2020-12-23 00:25:50,298 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:50,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 00:25:50,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1612 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2020-12-23 00:25:50,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:50,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 00:25:50,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129328966] [2020-12-23 00:25:50,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:25:50,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:50,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:25:50,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:25:50,685 INFO L87 Difference]: Start difference. First operand 251 states and 292 transitions. Second operand 37 states. [2020-12-23 00:25:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:50,824 INFO L93 Difference]: Finished difference Result 436 states and 518 transitions. [2020-12-23 00:25:50,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 00:25:50,825 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 207 [2020-12-23 00:25:50,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:50,826 INFO L225 Difference]: With dead ends: 436 [2020-12-23 00:25:50,826 INFO L226 Difference]: Without dead ends: 254 [2020-12-23 00:25:50,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:25:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-12-23 00:25:50,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2020-12-23 00:25:50,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-12-23 00:25:50,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 294 transitions. [2020-12-23 00:25:50,836 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 294 transitions. Word has length 207 [2020-12-23 00:25:50,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:50,836 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 294 transitions. [2020-12-23 00:25:50,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:25:50,836 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 294 transitions. [2020-12-23 00:25:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-12-23 00:25:50,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:50,838 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:51,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 00:25:51,052 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:51,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1434784116, now seen corresponding path program 8 times [2020-12-23 00:25:51,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:51,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24510581] [2020-12-23 00:25:51,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1679 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2020-12-23 00:25:51,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24510581] [2020-12-23 00:25:51,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154599909] [2020-12-23 00:25:51,962 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:52,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:52,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:52,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 00:25:52,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1679 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2020-12-23 00:25:52,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:52,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 00:25:52,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773347983] [2020-12-23 00:25:52,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 00:25:52,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:52,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 00:25:52,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:25:52,369 INFO L87 Difference]: Start difference. First operand 253 states and 294 transitions. Second operand 38 states. [2020-12-23 00:25:52,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:52,506 INFO L93 Difference]: Finished difference Result 438 states and 520 transitions. [2020-12-23 00:25:52,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:25:52,507 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 209 [2020-12-23 00:25:52,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:52,508 INFO L225 Difference]: With dead ends: 438 [2020-12-23 00:25:52,508 INFO L226 Difference]: Without dead ends: 256 [2020-12-23 00:25:52,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:25:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-23 00:25:52,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2020-12-23 00:25:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-12-23 00:25:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 296 transitions. [2020-12-23 00:25:52,517 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 296 transitions. Word has length 209 [2020-12-23 00:25:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:52,518 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 296 transitions. [2020-12-23 00:25:52,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 00:25:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 296 transitions. [2020-12-23 00:25:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-12-23 00:25:52,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:52,519 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:52,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 00:25:52,735 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:52,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:52,735 INFO L82 PathProgramCache]: Analyzing trace with hash -658952758, now seen corresponding path program 9 times [2020-12-23 00:25:52,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:52,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094392664] [2020-12-23 00:25:52,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1748 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2020-12-23 00:25:53,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094392664] [2020-12-23 00:25:53,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059543678] [2020-12-23 00:25:53,684 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:54,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 00:25:54,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:54,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:25:54,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1748 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1684 trivial. 0 not checked. [2020-12-23 00:25:54,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:54,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 11] total 47 [2020-12-23 00:25:54,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803744562] [2020-12-23 00:25:54,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 00:25:54,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:54,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 00:25:54,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=1405, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:25:54,669 INFO L87 Difference]: Start difference. First operand 255 states and 296 transitions. Second operand 47 states. [2020-12-23 00:25:54,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:54,884 INFO L93 Difference]: Finished difference Result 443 states and 526 transitions. [2020-12-23 00:25:54,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 00:25:54,885 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 211 [2020-12-23 00:25:54,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:54,886 INFO L225 Difference]: With dead ends: 443 [2020-12-23 00:25:54,887 INFO L226 Difference]: Without dead ends: 261 [2020-12-23 00:25:54,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=757, Invalid=1405, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:25:54,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-12-23 00:25:54,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 259. [2020-12-23 00:25:54,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-23 00:25:54,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 300 transitions. [2020-12-23 00:25:54,896 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 300 transitions. Word has length 211 [2020-12-23 00:25:54,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:54,897 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 300 transitions. [2020-12-23 00:25:54,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 00:25:54,897 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 300 transitions. [2020-12-23 00:25:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-12-23 00:25:54,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:54,898 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:55,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 00:25:55,112 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:55,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:55,113 INFO L82 PathProgramCache]: Analyzing trace with hash -409852538, now seen corresponding path program 10 times [2020-12-23 00:25:55,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:55,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438784833] [2020-12-23 00:25:55,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2020-12-23 00:25:56,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438784833] [2020-12-23 00:25:56,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663302179] [2020-12-23 00:25:56,027 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:56,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:25:56,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:56,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 00:25:56,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2020-12-23 00:25:56,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:56,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 00:25:56,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539803967] [2020-12-23 00:25:56,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:25:56,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:56,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:25:56,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:25:56,416 INFO L87 Difference]: Start difference. First operand 259 states and 300 transitions. Second operand 40 states. [2020-12-23 00:25:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:56,576 INFO L93 Difference]: Finished difference Result 446 states and 528 transitions. [2020-12-23 00:25:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 00:25:56,576 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 215 [2020-12-23 00:25:56,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:56,578 INFO L225 Difference]: With dead ends: 446 [2020-12-23 00:25:56,578 INFO L226 Difference]: Without dead ends: 262 [2020-12-23 00:25:56,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:25:56,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-23 00:25:56,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2020-12-23 00:25:56,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-12-23 00:25:56,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 302 transitions. [2020-12-23 00:25:56,588 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 302 transitions. Word has length 215 [2020-12-23 00:25:56,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:56,588 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 302 transitions. [2020-12-23 00:25:56,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:25:56,588 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 302 transitions. [2020-12-23 00:25:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-12-23 00:25:56,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:56,590 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:56,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:56,803 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:56,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1739030084, now seen corresponding path program 11 times [2020-12-23 00:25:56,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:56,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104685396] [2020-12-23 00:25:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1909 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2020-12-23 00:25:57,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104685396] [2020-12-23 00:25:57,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582024561] [2020-12-23 00:25:57,907 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:58,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2020-12-23 00:26:58,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:58,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 00:26:58,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1909 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2020-12-23 00:26:58,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:58,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 00:26:58,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019209457] [2020-12-23 00:26:58,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:26:58,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:58,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:26:58,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:26:58,884 INFO L87 Difference]: Start difference. First operand 261 states and 302 transitions. Second operand 41 states. [2020-12-23 00:26:59,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:59,060 INFO L93 Difference]: Finished difference Result 448 states and 530 transitions. [2020-12-23 00:26:59,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:26:59,062 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 217 [2020-12-23 00:26:59,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:59,063 INFO L225 Difference]: With dead ends: 448 [2020-12-23 00:26:59,064 INFO L226 Difference]: Without dead ends: 264 [2020-12-23 00:26:59,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:26:59,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-23 00:26:59,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2020-12-23 00:26:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-12-23 00:26:59,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 304 transitions. [2020-12-23 00:26:59,089 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 304 transitions. Word has length 217 [2020-12-23 00:26:59,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:59,089 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 304 transitions. [2020-12-23 00:26:59,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:26:59,090 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 304 transitions. [2020-12-23 00:26:59,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-12-23 00:26:59,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:59,091 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:59,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:59,304 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:59,305 INFO L82 PathProgramCache]: Analyzing trace with hash 935960450, now seen corresponding path program 12 times [2020-12-23 00:26:59,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:59,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832711310] [2020-12-23 00:26:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2020-12-23 00:27:00,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832711310] [2020-12-23 00:27:00,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515902463] [2020-12-23 00:27:00,359 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:27:01,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 00:27:01,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:27:01,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:27:01,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:27:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1831 trivial. 0 not checked. [2020-12-23 00:27:02,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:27:02,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 12] total 51 [2020-12-23 00:27:02,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571299541] [2020-12-23 00:27:02,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 00:27:02,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:27:02,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 00:27:02,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=1665, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 00:27:02,429 INFO L87 Difference]: Start difference. First operand 263 states and 304 transitions. Second operand 51 states. [2020-12-23 00:27:03,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:27:03,035 INFO L93 Difference]: Finished difference Result 478 states and 572 transitions. [2020-12-23 00:27:03,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 00:27:03,035 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 219 [2020-12-23 00:27:03,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:27:03,037 INFO L225 Difference]: With dead ends: 478 [2020-12-23 00:27:03,037 INFO L226 Difference]: Without dead ends: 294 [2020-12-23 00:27:03,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=885, Invalid=1665, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 00:27:03,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-12-23 00:27:03,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 281. [2020-12-23 00:27:03,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-12-23 00:27:03,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 326 transitions. [2020-12-23 00:27:03,048 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 326 transitions. Word has length 219 [2020-12-23 00:27:03,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:27:03,048 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 326 transitions. [2020-12-23 00:27:03,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 00:27:03,049 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 326 transitions. [2020-12-23 00:27:03,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-23 00:27:03,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:27:03,050 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:27:03,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 00:27:03,263 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:27:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:27:03,264 INFO L82 PathProgramCache]: Analyzing trace with hash 203381979, now seen corresponding path program 13 times [2020-12-23 00:27:03,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:27:03,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168463211] [2020-12-23 00:27:03,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:27:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2172 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-23 00:27:04,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168463211] [2020-12-23 00:27:04,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3061774] [2020-12-23 00:27:04,411 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:27:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:04,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 00:27:04,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:27:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2172 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-23 00:27:04,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:27:04,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 00:27:04,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118870711] [2020-12-23 00:27:04,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 00:27:04,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:27:04,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 00:27:04,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:27:04,870 INFO L87 Difference]: Start difference. First operand 281 states and 326 transitions. Second operand 43 states. [2020-12-23 00:27:05,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:27:05,046 INFO L93 Difference]: Finished difference Result 483 states and 573 transitions. [2020-12-23 00:27:05,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:27:05,046 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 233 [2020-12-23 00:27:05,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:27:05,048 INFO L225 Difference]: With dead ends: 483 [2020-12-23 00:27:05,048 INFO L226 Difference]: Without dead ends: 283 [2020-12-23 00:27:05,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:27:05,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-23 00:27:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2020-12-23 00:27:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-12-23 00:27:05,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 328 transitions. [2020-12-23 00:27:05,058 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 328 transitions. Word has length 233 [2020-12-23 00:27:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:27:05,058 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 328 transitions. [2020-12-23 00:27:05,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 00:27:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 328 transitions. [2020-12-23 00:27:05,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-23 00:27:05,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:27:05,060 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:27:05,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:27:05,274 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:27:05,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:27:05,275 INFO L82 PathProgramCache]: Analyzing trace with hash -956087783, now seen corresponding path program 14 times [2020-12-23 00:27:05,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:27:05,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540913788] [2020-12-23 00:27:05,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:27:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2061 trivial. 0 not checked. [2020-12-23 00:27:05,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540913788] [2020-12-23 00:27:05,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692859009] [2020-12-23 00:27:05,488 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:27:05,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:27:05,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:27:05,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:27:05,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:27:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2061 trivial. 0 not checked. [2020-12-23 00:27:05,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:27:05,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:27:05,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863681034] [2020-12-23 00:27:05,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:27:05,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:27:05,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:27:05,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:27:05,895 INFO L87 Difference]: Start difference. First operand 283 states and 328 transitions. Second operand 14 states. [2020-12-23 00:27:06,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:27:06,129 INFO L93 Difference]: Finished difference Result 430 states and 510 transitions. [2020-12-23 00:27:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:27:06,130 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 235 [2020-12-23 00:27:06,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:27:06,132 INFO L225 Difference]: With dead ends: 430 [2020-12-23 00:27:06,132 INFO L226 Difference]: Without dead ends: 311 [2020-12-23 00:27:06,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:27:06,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-12-23 00:27:06,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 299. [2020-12-23 00:27:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-12-23 00:27:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 348 transitions. [2020-12-23 00:27:06,142 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 348 transitions. Word has length 235 [2020-12-23 00:27:06,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:27:06,143 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 348 transitions. [2020-12-23 00:27:06,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:27:06,143 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 348 transitions. [2020-12-23 00:27:06,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-12-23 00:27:06,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:27:06,145 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:27:06,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:27:06,359 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:27:06,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:27:06,360 INFO L82 PathProgramCache]: Analyzing trace with hash 388823092, now seen corresponding path program 15 times [2020-12-23 00:27:06,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:27:06,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144493930] [2020-12-23 00:27:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:27:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 2143 trivial. 0 not checked. [2020-12-23 00:27:06,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144493930] [2020-12-23 00:27:06,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852351779] [2020-12-23 00:27:06,617 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:27:07,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 00:27:07,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:27:07,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:27:07,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:27:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2293 trivial. 0 not checked. [2020-12-23 00:27:08,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:27:08,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-12-23 00:27:08,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324837234] [2020-12-23 00:27:08,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 00:27:08,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:27:08,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 00:27:08,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:27:08,057 INFO L87 Difference]: Start difference. First operand 299 states and 348 transitions. Second operand 24 states. [2020-12-23 00:27:08,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:27:08,380 INFO L93 Difference]: Finished difference Result 457 states and 544 transitions. [2020-12-23 00:27:08,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:27:08,381 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 247 [2020-12-23 00:27:08,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:27:08,383 INFO L225 Difference]: With dead ends: 457 [2020-12-23 00:27:08,383 INFO L226 Difference]: Without dead ends: 330 [2020-12-23 00:27:08,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:27:08,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-12-23 00:27:08,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 317. [2020-12-23 00:27:08,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-12-23 00:27:08,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 370 transitions. [2020-12-23 00:27:08,395 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 370 transitions. Word has length 247 [2020-12-23 00:27:08,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:27:08,395 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 370 transitions. [2020-12-23 00:27:08,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 00:27:08,396 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 370 transitions. [2020-12-23 00:27:08,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-23 00:27:08,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:27:08,397 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:27:08,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 00:27:08,611 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:27:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:27:08,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1410638669, now seen corresponding path program 16 times [2020-12-23 00:27:08,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:27:08,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236598198] [2020-12-23 00:27:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:27:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 2252 trivial. 0 not checked. [2020-12-23 00:27:08,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236598198] [2020-12-23 00:27:08,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945306139] [2020-12-23 00:27:08,864 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:27:09,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:27:09,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:27:09,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:27:09,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:27:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 2252 trivial. 0 not checked. [2020-12-23 00:27:09,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:27:09,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 00:27:09,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204202809] [2020-12-23 00:27:09,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:27:09,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:27:09,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:27:09,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:27:09,317 INFO L87 Difference]: Start difference. First operand 317 states and 370 transitions. Second operand 16 states. [2020-12-23 00:27:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:27:09,580 INFO L93 Difference]: Finished difference Result 482 states and 574 transitions. [2020-12-23 00:27:09,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:27:09,581 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 261 [2020-12-23 00:27:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:27:09,583 INFO L225 Difference]: With dead ends: 482 [2020-12-23 00:27:09,583 INFO L226 Difference]: Without dead ends: 345 [2020-12-23 00:27:09,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:27:09,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-12-23 00:27:09,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 333. [2020-12-23 00:27:09,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-12-23 00:27:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 390 transitions. [2020-12-23 00:27:09,594 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 390 transitions. Word has length 261 [2020-12-23 00:27:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:27:09,594 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 390 transitions. [2020-12-23 00:27:09,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:27:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 390 transitions. [2020-12-23 00:27:09,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-12-23 00:27:09,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:27:09,596 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:27:09,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 00:27:09,809 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:27:09,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:27:09,810 INFO L82 PathProgramCache]: Analyzing trace with hash -556367512, now seen corresponding path program 17 times [2020-12-23 00:27:09,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:27:09,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315941593] [2020-12-23 00:27:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:27:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2350 trivial. 0 not checked. [2020-12-23 00:27:10,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315941593] [2020-12-23 00:27:10,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034061649] [2020-12-23 00:27:10,081 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true