/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:29:53,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:29:53,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:29:53,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:29:53,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:29:53,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:29:53,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:29:53,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:29:53,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:29:53,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:29:53,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:29:53,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:29:53,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:29:53,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:29:53,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:29:53,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:29:53,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:29:53,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:29:53,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:29:53,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:29:53,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:29:53,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:29:53,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:29:53,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:29:53,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:29:53,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:29:53,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:29:53,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:29:53,523 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:29:53,579 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:29:53,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:29:53,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:29:53,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:29:53,584 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:29:53,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:29:53,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:29:53,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:29:53,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:29:53,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:29:53,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:29:53,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:29:53,587 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:29:53,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:29:53,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:29:53,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:29:53,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:29:53,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:29:53,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:29:53,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:29:53,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:29:53,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:29:53,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:29:53,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:29:53,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:29:53,590 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:29:54,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:29:54,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:29:54,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:29:54,135 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:29:54,136 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:29:54,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c [2021-01-06 10:29:54,226 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9c64866bd/5b54c9a24a5b4d8aa5b021222c118de8/FLAG8fbb6ca86 [2021-01-06 10:29:54,910 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:29:54,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c [2021-01-06 10:29:54,918 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9c64866bd/5b54c9a24a5b4d8aa5b021222c118de8/FLAG8fbb6ca86 [2021-01-06 10:29:55,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9c64866bd/5b54c9a24a5b4d8aa5b021222c118de8 [2021-01-06 10:29:55,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:29:55,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:29:55,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:29:55,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:29:55,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:29:55,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:29:55" (1/1) ... [2021-01-06 10:29:55,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@764660c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:55, skipping insertion in model container [2021-01-06 10:29:55,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:29:55" (1/1) ... [2021-01-06 10:29:55,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:29:55,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:29:55,481 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c[331,344] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:29:55,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:29:55,520 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:29:55,535 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c[331,344] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:29:55,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:29:55,568 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:29:55,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:55 WrapperNode [2021-01-06 10:29:55,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:29:55,570 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:29:55,570 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:29:55,570 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:29:55,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:55" (1/1) ... [2021-01-06 10:29:55,589 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:55" (1/1) ... [2021-01-06 10:29:55,616 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:29:55,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:29:55,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:29:55,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:29:55,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:55" (1/1) ... [2021-01-06 10:29:55,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:55" (1/1) ... [2021-01-06 10:29:55,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:55" (1/1) ... [2021-01-06 10:29:55,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:55" (1/1) ... [2021-01-06 10:29:55,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:55" (1/1) ... [2021-01-06 10:29:55,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:55" (1/1) ... [2021-01-06 10:29:55,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:55" (1/1) ... [2021-01-06 10:29:55,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:29:55,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:29:55,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:29:55,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:29:55,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:29:55,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:29:55,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:29:55,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:29:55,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:29:55,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:29:55,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:29:55,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:29:56,092 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:29:56,092 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 10:29:56,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:29:56 BoogieIcfgContainer [2021-01-06 10:29:56,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:29:56,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:29:56,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:29:56,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:29:56,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:29:55" (1/3) ... [2021-01-06 10:29:56,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aafbfcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:29:56, skipping insertion in model container [2021-01-06 10:29:56,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:55" (2/3) ... [2021-01-06 10:29:56,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aafbfcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:29:56, skipping insertion in model container [2021-01-06 10:29:56,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:29:56" (3/3) ... [2021-01-06 10:29:56,105 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_2.c [2021-01-06 10:29:56,144 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:29:56,156 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:29:56,253 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:29:56,326 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:29:56,327 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:29:56,327 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:29:56,327 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:29:56,327 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:29:56,327 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:29:56,327 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:29:56,328 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:29:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 10:29:56,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:29:56,367 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:56,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:56,369 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:56,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:56,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2021-01-06 10:29:56,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:56,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141450066] [2021-01-06 10:29:56,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:56,569 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:56,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518196626] [2021-01-06 10:29:56,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:56,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2021-01-06 10:29:56,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:29:56,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141450066] [2021-01-06 10:29:56,750 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:56,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518196626] [2021-01-06 10:29:56,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:29:56,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:29:56,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953849600] [2021-01-06 10:29:56,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:29:56,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:56,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:29:56,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:29:56,789 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 10:29:56,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:56,815 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2021-01-06 10:29:56,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:29:56,817 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 10:29:56,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:56,830 INFO L225 Difference]: With dead ends: 39 [2021-01-06 10:29:56,830 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 10:29:56,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:29:56,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 10:29:56,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 10:29:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 10:29:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-01-06 10:29:56,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2021-01-06 10:29:56,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:56,876 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-01-06 10:29:56,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:29:56,876 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-01-06 10:29:56,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:29:56,877 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:56,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:57,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-01-06 10:29:57,092 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:57,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:57,094 INFO L82 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2021-01-06 10:29:57,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:57,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664903242] [2021-01-06 10:29:57,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:57,108 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:57,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238616862] [2021-01-06 10:29:57,109 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 [2021-01-06 10:29:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:57,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:29:57,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:29:57,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664903242] [2021-01-06 10:29:57,262 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:57,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238616862] [2021-01-06 10:29:57,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:29:57,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:29:57,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497823558] [2021-01-06 10:29:57,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:29:57,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:57,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:29:57,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:29:57,266 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2021-01-06 10:29:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:57,328 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-01-06 10:29:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:29:57,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-01-06 10:29:57,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:57,330 INFO L225 Difference]: With dead ends: 42 [2021-01-06 10:29:57,330 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:29:57,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:29:57,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:29:57,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2021-01-06 10:29:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 10:29:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-01-06 10:29:57,338 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2021-01-06 10:29:57,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:57,338 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-01-06 10:29:57,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:29:57,338 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-01-06 10:29:57,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:29:57,339 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:57,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:57,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:57,554 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:57,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:57,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2021-01-06 10:29:57,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:57,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685868675] [2021-01-06 10:29:57,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:57,570 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:57,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480744819] [2021-01-06 10:29:57,570 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 [2021-01-06 10:29:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:57,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:29:57,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:29:57,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685868675] [2021-01-06 10:29:57,736 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:57,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480744819] [2021-01-06 10:29:57,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:57,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 10:29:57,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899688953] [2021-01-06 10:29:57,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:29:57,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:57,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:29:57,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:29:57,740 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2021-01-06 10:29:57,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:57,814 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-01-06 10:29:57,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:29:57,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-01-06 10:29:57,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:57,816 INFO L225 Difference]: With dead ends: 54 [2021-01-06 10:29:57,816 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 10:29:57,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:29:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 10:29:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2021-01-06 10:29:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:29:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-01-06 10:29:57,825 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2021-01-06 10:29:57,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:57,826 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-01-06 10:29:57,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:29:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-01-06 10:29:57,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:29:57,827 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:57,828 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:58,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:58,046 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:58,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:58,048 INFO L82 PathProgramCache]: Analyzing trace with hash -2118808138, now seen corresponding path program 2 times [2021-01-06 10:29:58,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:58,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507548233] [2021-01-06 10:29:58,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:58,061 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:58,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584105805] [2021-01-06 10:29:58,062 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 [2021-01-06 10:29:58,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:29:58,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:58,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:29:58,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:29:58,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507548233] [2021-01-06 10:29:58,289 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:58,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584105805] [2021-01-06 10:29:58,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:29:58,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:29:58,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078743201] [2021-01-06 10:29:58,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:29:58,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:58,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:29:58,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:29:58,296 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2021-01-06 10:29:58,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:58,452 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-01-06 10:29:58,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:29:58,453 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 10:29:58,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:58,455 INFO L225 Difference]: With dead ends: 35 [2021-01-06 10:29:58,455 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:29:58,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:29:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:29:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-01-06 10:29:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 10:29:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-01-06 10:29:58,462 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2021-01-06 10:29:58,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:58,463 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-01-06 10:29:58,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:29:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-01-06 10:29:58,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:29:58,464 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:58,464 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:58,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:58,675 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:58,677 INFO L82 PathProgramCache]: Analyzing trace with hash -2118867720, now seen corresponding path program 1 times [2021-01-06 10:29:58,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:58,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810323105] [2021-01-06 10:29:58,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:58,692 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:58,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45587807] [2021-01-06 10:29:58,693 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:58,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:29:58,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:29:58,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810323105] [2021-01-06 10:29:58,894 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:58,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45587807] [2021-01-06 10:29:58,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:58,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:29:58,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098346514] [2021-01-06 10:29:58,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:29:58,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:58,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:29:58,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:29:58,899 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2021-01-06 10:29:59,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:59,005 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2021-01-06 10:29:59,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:29:59,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 10:29:59,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:59,008 INFO L225 Difference]: With dead ends: 89 [2021-01-06 10:29:59,008 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 10:29:59,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:29:59,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 10:29:59,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 34. [2021-01-06 10:29:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:29:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-01-06 10:29:59,016 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2021-01-06 10:29:59,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:59,017 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-01-06 10:29:59,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:29:59,017 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-01-06 10:29:59,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 10:29:59,018 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:59,018 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:59,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:59,231 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:59,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:59,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1636705269, now seen corresponding path program 2 times [2021-01-06 10:29:59,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:59,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875749358] [2021-01-06 10:29:59,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:59,249 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:59,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221936615] [2021-01-06 10:29:59,250 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:59,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:29:59,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:59,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:29:59,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 10:29:59,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875749358] [2021-01-06 10:29:59,439 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:59,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221936615] [2021-01-06 10:29:59,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:29:59,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:29:59,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177823893] [2021-01-06 10:29:59,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:29:59,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:59,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:29:59,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:29:59,442 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 6 states. [2021-01-06 10:29:59,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:59,558 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-01-06 10:29:59,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:29:59,559 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2021-01-06 10:29:59,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:59,560 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:29:59,560 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 10:29:59,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:29:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 10:29:59,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2021-01-06 10:29:59,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 10:29:59,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-01-06 10:29:59,568 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2021-01-06 10:29:59,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:59,568 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-01-06 10:29:59,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:29:59,569 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-01-06 10:29:59,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 10:29:59,570 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:59,570 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:59,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:59,786 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:59,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:59,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1380764901, now seen corresponding path program 1 times [2021-01-06 10:29:59,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:59,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7812922] [2021-01-06 10:29:59,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:59,797 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:59,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340264777] [2021-01-06 10:29:59,798 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:59,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:29:59,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:29:59,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7812922] [2021-01-06 10:29:59,997 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:59,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340264777] [2021-01-06 10:29:59,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:59,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:29:59,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902347764] [2021-01-06 10:29:59,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:29:59,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:59,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:30:00,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:30:00,000 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 7 states. [2021-01-06 10:30:00,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:00,146 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2021-01-06 10:30:00,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:30:00,147 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2021-01-06 10:30:00,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:00,148 INFO L225 Difference]: With dead ends: 127 [2021-01-06 10:30:00,149 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:30:00,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:30:00,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:30:00,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 44. [2021-01-06 10:30:00,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 10:30:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-01-06 10:30:00,158 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 31 [2021-01-06 10:30:00,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:00,158 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-01-06 10:30:00,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:30:00,158 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-01-06 10:30:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 10:30:00,159 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:00,159 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:00,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:00,373 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:00,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:00,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1775597512, now seen corresponding path program 2 times [2021-01-06 10:30:00,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:00,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061563453] [2021-01-06 10:30:00,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:00,386 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:00,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975775551] [2021-01-06 10:30:00,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:00,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:30:00,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:00,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:30:00,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:30:00,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061563453] [2021-01-06 10:30:00,635 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:00,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975775551] [2021-01-06 10:30:00,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:00,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:30:00,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118538721] [2021-01-06 10:30:00,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:30:00,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:00,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:30:00,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:30:00,638 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2021-01-06 10:30:00,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:00,768 INFO L93 Difference]: Finished difference Result 149 states and 180 transitions. [2021-01-06 10:30:00,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:30:00,768 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2021-01-06 10:30:00,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:00,770 INFO L225 Difference]: With dead ends: 149 [2021-01-06 10:30:00,770 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 10:30:00,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:30:00,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 10:30:00,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 49. [2021-01-06 10:30:00,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 10:30:00,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-01-06 10:30:00,780 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 36 [2021-01-06 10:30:00,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:00,780 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-01-06 10:30:00,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:30:00,780 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-01-06 10:30:00,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:30:00,782 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:00,782 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:00,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-06 10:30:00,996 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:00,997 INFO L82 PathProgramCache]: Analyzing trace with hash -599004987, now seen corresponding path program 3 times [2021-01-06 10:30:00,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:00,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028591086] [2021-01-06 10:30:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:01,008 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:01,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756130246] [2021-01-06 10:30:01,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:01,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:30:01,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:01,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:30:01,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 10:30:01,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028591086] [2021-01-06 10:30:01,313 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:01,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756130246] [2021-01-06 10:30:01,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:01,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:30:01,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621547527] [2021-01-06 10:30:01,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:30:01,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:01,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:30:01,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:30:01,316 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 8 states. [2021-01-06 10:30:01,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:01,469 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-01-06 10:30:01,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:30:01,469 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2021-01-06 10:30:01,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:01,470 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:30:01,471 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 10:30:01,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:30:01,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 10:30:01,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2021-01-06 10:30:01,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 10:30:01,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-01-06 10:30:01,479 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 41 [2021-01-06 10:30:01,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:01,480 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-01-06 10:30:01,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:30:01,480 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-01-06 10:30:01,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:30:01,481 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:01,481 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:01,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:01,695 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:01,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:01,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1681892459, now seen corresponding path program 4 times [2021-01-06 10:30:01,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:01,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573883227] [2021-01-06 10:30:01,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:01,706 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:01,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613857273] [2021-01-06 10:30:01,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:01,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:30:01,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:01,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:30:01,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:01,864 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 17 treesize of output 13 [2021-01-06 10:30:01,865 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:30:01,873 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:30:01,874 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:30:01,874 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:30:01,903 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-01-06 10:30:01,905 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:30:01,907 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:30:01,907 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:30:01,908 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-01-06 10:30:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-01-06 10:30:01,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573883227] [2021-01-06 10:30:01,942 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:01,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613857273] [2021-01-06 10:30:01,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:01,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:30:01,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653462899] [2021-01-06 10:30:01,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:30:01,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:01,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:30:01,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:30:01,944 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 6 states. [2021-01-06 10:30:02,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:02,016 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2021-01-06 10:30:02,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:30:02,017 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-01-06 10:30:02,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:02,017 INFO L225 Difference]: With dead ends: 116 [2021-01-06 10:30:02,017 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 10:30:02,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:30:02,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 10:30:02,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-01-06 10:30:02,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 10:30:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-01-06 10:30:02,026 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 46 [2021-01-06 10:30:02,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:02,026 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-01-06 10:30:02,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:30:02,026 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-01-06 10:30:02,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:30:02,027 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:02,027 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:02,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:02,234 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:02,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:02,235 INFO L82 PathProgramCache]: Analyzing trace with hash -562090839, now seen corresponding path program 1 times [2021-01-06 10:30:02,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:02,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724414428] [2021-01-06 10:30:02,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:02,256 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:02,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852243078] [2021-01-06 10:30:02,257 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:30:02,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:30:02,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:30:02,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724414428] [2021-01-06 10:30:02,466 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:02,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852243078] [2021-01-06 10:30:02,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:02,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:30:02,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006788627] [2021-01-06 10:30:02,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:30:02,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:02,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:30:02,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:30:02,469 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 9 states. [2021-01-06 10:30:02,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:02,621 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2021-01-06 10:30:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:30:02,622 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2021-01-06 10:30:02,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:02,624 INFO L225 Difference]: With dead ends: 197 [2021-01-06 10:30:02,624 INFO L226 Difference]: Without dead ends: 169 [2021-01-06 10:30:02,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:30:02,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-01-06 10:30:02,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 59. [2021-01-06 10:30:02,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 10:30:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-01-06 10:30:02,633 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 46 [2021-01-06 10:30:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:02,634 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-01-06 10:30:02,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:30:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-01-06 10:30:02,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:30:02,635 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:02,635 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:02,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 10:30:02,851 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:02,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:02,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1943967942, now seen corresponding path program 2 times [2021-01-06 10:30:02,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:02,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152897796] [2021-01-06 10:30:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:02,861 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:02,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284586368] [2021-01-06 10:30:02,861 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:02,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:30:02,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:02,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:30:02,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:30:03,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152897796] [2021-01-06 10:30:03,171 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:03,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284586368] [2021-01-06 10:30:03,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:03,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:30:03,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799484014] [2021-01-06 10:30:03,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:30:03,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:03,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:30:03,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:30:03,174 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 10 states. [2021-01-06 10:30:03,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:03,336 INFO L93 Difference]: Finished difference Result 224 states and 268 transitions. [2021-01-06 10:30:03,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:30:03,336 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2021-01-06 10:30:03,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:03,338 INFO L225 Difference]: With dead ends: 224 [2021-01-06 10:30:03,338 INFO L226 Difference]: Without dead ends: 196 [2021-01-06 10:30:03,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:30:03,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-01-06 10:30:03,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 64. [2021-01-06 10:30:03,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 10:30:03,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2021-01-06 10:30:03,347 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 51 [2021-01-06 10:30:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:03,348 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2021-01-06 10:30:03,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:30:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2021-01-06 10:30:03,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:30:03,349 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:03,349 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:03,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:03,564 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:03,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:03,565 INFO L82 PathProgramCache]: Analyzing trace with hash 71442249, now seen corresponding path program 3 times [2021-01-06 10:30:03,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:03,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315374246] [2021-01-06 10:30:03,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:03,574 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:03,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492852230] [2021-01-06 10:30:03,575 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:03,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:30:03,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:03,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:30:03,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:03,802 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 17 treesize of output 13 [2021-01-06 10:30:03,803 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:30:03,809 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:30:03,810 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:30:03,810 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:30:03,837 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-01-06 10:30:03,839 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:30:03,843 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:30:03,844 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:30:03,844 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2021-01-06 10:30:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-01-06 10:30:03,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315374246] [2021-01-06 10:30:03,916 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:03,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492852230] [2021-01-06 10:30:03,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:30:03,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 10:30:03,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764196961] [2021-01-06 10:30:03,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:30:03,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:03,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:30:03,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:30:03,919 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 7 states. [2021-01-06 10:30:04,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:04,069 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2021-01-06 10:30:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:30:04,070 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2021-01-06 10:30:04,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:04,071 INFO L225 Difference]: With dead ends: 136 [2021-01-06 10:30:04,072 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:30:04,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:30:04,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:30:04,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2021-01-06 10:30:04,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:30:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2021-01-06 10:30:04,080 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 56 [2021-01-06 10:30:04,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:04,080 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2021-01-06 10:30:04,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:30:04,080 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2021-01-06 10:30:04,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:30:04,081 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:04,082 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:04,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:30:04,292 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:04,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:04,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1617501493, now seen corresponding path program 4 times [2021-01-06 10:30:04,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:04,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128152903] [2021-01-06 10:30:04,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:04,301 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:04,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795649007] [2021-01-06 10:30:04,302 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:04,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:30:04,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:04,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:30:04,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:04,389 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 17 treesize of output 13 [2021-01-06 10:30:04,390 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:30:04,396 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:30:04,397 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:30:04,397 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:30:04,414 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-06 10:30:04,416 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:30:04,418 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:30:04,419 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:30:04,419 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2021-01-06 10:30:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:30:04,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128152903] [2021-01-06 10:30:04,462 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:04,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795649007] [2021-01-06 10:30:04,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:30:04,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:30:04,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684288755] [2021-01-06 10:30:04,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:30:04,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:04,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:30:04,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:30:04,465 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 5 states. [2021-01-06 10:30:04,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:04,525 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2021-01-06 10:30:04,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:30:04,526 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2021-01-06 10:30:04,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:04,527 INFO L225 Difference]: With dead ends: 132 [2021-01-06 10:30:04,527 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 10:30:04,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:30:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 10:30:04,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2021-01-06 10:30:04,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:30:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2021-01-06 10:30:04,535 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 56 [2021-01-06 10:30:04,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:04,535 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2021-01-06 10:30:04,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:30:04,536 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2021-01-06 10:30:04,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:30:04,537 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:04,537 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:04,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:04,753 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:04,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:04,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1633020211, now seen corresponding path program 5 times [2021-01-06 10:30:04,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:04,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528741693] [2021-01-06 10:30:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:04,764 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:04,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038472051] [2021-01-06 10:30:04,764 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:04,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 10:30:04,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:04,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:30:04,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:04,843 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 17 treesize of output 13 [2021-01-06 10:30:04,844 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:30:04,846 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:30:04,847 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:30:04,847 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2021-01-06 10:30:04,977 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:30:04,978 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 71 [2021-01-06 10:30:04,985 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:30:05,015 INFO L625 ElimStorePlain]: treesize reduction 30, result has 55.2 percent of original size [2021-01-06 10:30:05,017 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:30:05,018 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:37 [2021-01-06 10:30:05,070 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:30:05,071 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2021-01-06 10:30:05,073 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:30:05,087 INFO L625 ElimStorePlain]: treesize reduction 12, result has 57.1 percent of original size [2021-01-06 10:30:05,089 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:30:05,089 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:3 [2021-01-06 10:30:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-01-06 10:30:05,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528741693] [2021-01-06 10:30:05,123 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:05,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038472051] [2021-01-06 10:30:05,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:05,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:30:05,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802920861] [2021-01-06 10:30:05,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:30:05,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:05,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:30:05,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:30:05,125 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 8 states. [2021-01-06 10:30:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:05,269 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2021-01-06 10:30:05,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:30:05,270 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2021-01-06 10:30:05,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:05,271 INFO L225 Difference]: With dead ends: 140 [2021-01-06 10:30:05,271 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 10:30:05,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:30:05,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 10:30:05,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2021-01-06 10:30:05,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 10:30:05,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-01-06 10:30:05,281 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 56 [2021-01-06 10:30:05,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:05,281 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-01-06 10:30:05,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:30:05,281 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-01-06 10:30:05,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:30:05,282 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:05,283 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:05,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:30:05,498 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:05,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:05,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1670153675, now seen corresponding path program 6 times [2021-01-06 10:30:05,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:05,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914358726] [2021-01-06 10:30:05,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:05,507 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:05,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [822577445] [2021-01-06 10:30:05,508 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:05,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:30:05,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:05,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 10:30:05,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-01-06 10:30:05,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914358726] [2021-01-06 10:30:05,929 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:05,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822577445] [2021-01-06 10:30:05,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:05,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:30:05,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379176976] [2021-01-06 10:30:05,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:30:05,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:05,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:30:05,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:30:05,932 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 10 states. [2021-01-06 10:30:06,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:06,188 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2021-01-06 10:30:06,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:30:06,189 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2021-01-06 10:30:06,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:06,190 INFO L225 Difference]: With dead ends: 103 [2021-01-06 10:30:06,190 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 10:30:06,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:30:06,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 10:30:06,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2021-01-06 10:30:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 10:30:06,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2021-01-06 10:30:06,205 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 56 [2021-01-06 10:30:06,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:06,205 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2021-01-06 10:30:06,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:30:06,205 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2021-01-06 10:30:06,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 10:30:06,206 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:06,206 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:06,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:30:06,420 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:06,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:06,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1477851941, now seen corresponding path program 7 times [2021-01-06 10:30:06,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:06,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806136625] [2021-01-06 10:30:06,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:06,429 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:06,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202839172] [2021-01-06 10:30:06,430 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:30:06,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:30:06,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:30:06,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806136625] [2021-01-06 10:30:06,667 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:06,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202839172] [2021-01-06 10:30:06,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:06,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:30:06,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563839385] [2021-01-06 10:30:06,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:30:06,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:06,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:30:06,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:30:06,678 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand 11 states. [2021-01-06 10:30:06,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:06,869 INFO L93 Difference]: Finished difference Result 336 states and 400 transitions. [2021-01-06 10:30:06,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:30:06,870 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2021-01-06 10:30:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:06,873 INFO L225 Difference]: With dead ends: 336 [2021-01-06 10:30:06,873 INFO L226 Difference]: Without dead ends: 291 [2021-01-06 10:30:06,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:30:06,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-01-06 10:30:06,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 106. [2021-01-06 10:30:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 10:30:06,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2021-01-06 10:30:06,885 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 61 [2021-01-06 10:30:06,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:06,886 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2021-01-06 10:30:06,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:30:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2021-01-06 10:30:06,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 10:30:06,887 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:06,887 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:07,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:30:07,102 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:07,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:07,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1255875722, now seen corresponding path program 8 times [2021-01-06 10:30:07,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:07,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747460240] [2021-01-06 10:30:07,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:07,115 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:07,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491275296] [2021-01-06 10:30:07,115 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:07,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:30:07,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:07,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:30:07,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:30:07,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747460240] [2021-01-06 10:30:07,489 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:07,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491275296] [2021-01-06 10:30:07,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:07,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:30:07,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122657609] [2021-01-06 10:30:07,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:30:07,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:07,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:30:07,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:30:07,491 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand 12 states. [2021-01-06 10:30:07,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:07,689 INFO L93 Difference]: Finished difference Result 373 states and 443 transitions. [2021-01-06 10:30:07,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:30:07,690 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2021-01-06 10:30:07,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:07,692 INFO L225 Difference]: With dead ends: 373 [2021-01-06 10:30:07,692 INFO L226 Difference]: Without dead ends: 328 [2021-01-06 10:30:07,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:30:07,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-01-06 10:30:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 116. [2021-01-06 10:30:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 10:30:07,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2021-01-06 10:30:07,705 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 66 [2021-01-06 10:30:07,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:07,705 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2021-01-06 10:30:07,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:30:07,706 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2021-01-06 10:30:07,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 10:30:07,707 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:07,707 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:07,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:30:07,921 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:07,922 INFO L82 PathProgramCache]: Analyzing trace with hash -495794747, now seen corresponding path program 9 times [2021-01-06 10:30:07,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:07,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467266959] [2021-01-06 10:30:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:07,939 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:07,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556350431] [2021-01-06 10:30:07,940 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:08,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:30:08,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:08,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 10:30:08,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-01-06 10:30:08,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467266959] [2021-01-06 10:30:08,396 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:08,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556350431] [2021-01-06 10:30:08,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:08,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:30:08,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438024688] [2021-01-06 10:30:08,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:30:08,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:08,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:30:08,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:30:08,399 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand 10 states. [2021-01-06 10:30:08,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:08,692 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2021-01-06 10:30:08,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:30:08,693 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2021-01-06 10:30:08,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:08,694 INFO L225 Difference]: With dead ends: 128 [2021-01-06 10:30:08,694 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 10:30:08,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:30:08,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 10:30:08,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2021-01-06 10:30:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-01-06 10:30:08,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2021-01-06 10:30:08,704 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 71 [2021-01-06 10:30:08,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:08,704 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2021-01-06 10:30:08,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:30:08,704 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2021-01-06 10:30:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 10:30:08,705 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:08,705 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:08,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:08,912 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:08,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:08,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1692067691, now seen corresponding path program 10 times [2021-01-06 10:30:08,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:08,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173334322] [2021-01-06 10:30:08,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:08,921 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:08,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112028461] [2021-01-06 10:30:08,922 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 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 [2021-01-06 10:30:08,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:30:08,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:08,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:30:08,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:09,024 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 17 treesize of output 13 [2021-01-06 10:30:09,025 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:30:09,030 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:30:09,031 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:30:09,031 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:30:09,060 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-01-06 10:30:09,063 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:30:09,067 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:30:09,069 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:30:09,069 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:28, output treesize:3 [2021-01-06 10:30:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:30:09,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173334322] [2021-01-06 10:30:09,114 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:09,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112028461] [2021-01-06 10:30:09,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:09,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:30:09,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195641767] [2021-01-06 10:30:09,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:30:09,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:09,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:30:09,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:30:09,116 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 7 states. [2021-01-06 10:30:09,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:09,213 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2021-01-06 10:30:09,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:30:09,214 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2021-01-06 10:30:09,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:09,215 INFO L225 Difference]: With dead ends: 176 [2021-01-06 10:30:09,215 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:30:09,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:30:09,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:30:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2021-01-06 10:30:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 10:30:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-01-06 10:30:09,222 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 76 [2021-01-06 10:30:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:09,222 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-01-06 10:30:09,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:30:09,223 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-01-06 10:30:09,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 10:30:09,223 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:09,224 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:09,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:09,439 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:09,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2042199827, now seen corresponding path program 1 times [2021-01-06 10:30:09,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:09,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441313153] [2021-01-06 10:30:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:09,447 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:09,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071658182] [2021-01-06 10:30:09,447 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 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 [2021-01-06 10:30:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:30:09,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:30:09,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:30:09,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441313153] [2021-01-06 10:30:09,773 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:09,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071658182] [2021-01-06 10:30:09,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:09,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:30:09,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896551053] [2021-01-06 10:30:09,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:30:09,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:09,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:30:09,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:30:09,775 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 13 states. [2021-01-06 10:30:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:09,993 INFO L93 Difference]: Finished difference Result 386 states and 451 transitions. [2021-01-06 10:30:09,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:30:09,993 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2021-01-06 10:30:09,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:09,995 INFO L225 Difference]: With dead ends: 386 [2021-01-06 10:30:09,995 INFO L226 Difference]: Without dead ends: 346 [2021-01-06 10:30:09,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:30:09,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-01-06 10:30:10,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 91. [2021-01-06 10:30:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 10:30:10,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-01-06 10:30:10,004 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 76 [2021-01-06 10:30:10,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:10,005 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-01-06 10:30:10,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:30:10,005 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-01-06 10:30:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 10:30:10,006 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:10,006 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:10,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 10:30:10,220 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:10,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:10,222 INFO L82 PathProgramCache]: Analyzing trace with hash 279020216, now seen corresponding path program 2 times [2021-01-06 10:30:10,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:10,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863149297] [2021-01-06 10:30:10,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:10,230 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:10,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861228320] [2021-01-06 10:30:10,230 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 [2021-01-06 10:30:10,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:30:10,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:10,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:30:10,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:30:10,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863149297] [2021-01-06 10:30:10,615 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:10,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861228320] [2021-01-06 10:30:10,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:10,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:30:10,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897131492] [2021-01-06 10:30:10,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:30:10,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:10,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:30:10,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:30:10,617 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 14 states. [2021-01-06 10:30:10,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:10,899 INFO L93 Difference]: Finished difference Result 423 states and 494 transitions. [2021-01-06 10:30:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:30:10,901 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2021-01-06 10:30:10,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:10,903 INFO L225 Difference]: With dead ends: 423 [2021-01-06 10:30:10,903 INFO L226 Difference]: Without dead ends: 383 [2021-01-06 10:30:10,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:30:10,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-01-06 10:30:10,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 96. [2021-01-06 10:30:10,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 10:30:10,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2021-01-06 10:30:10,915 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 81 [2021-01-06 10:30:10,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:10,915 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2021-01-06 10:30:10,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:30:10,915 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2021-01-06 10:30:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:30:10,916 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:10,917 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:11,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:11,131 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:11,132 INFO L82 PathProgramCache]: Analyzing trace with hash -697899059, now seen corresponding path program 3 times [2021-01-06 10:30:11,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:11,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888097696] [2021-01-06 10:30:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:11,151 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:11,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653287383] [2021-01-06 10:30:11,155 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 [2021-01-06 10:30:11,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:30:11,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:11,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:30:11,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:27,601 WARN L197 SmtUtils]: Spent 16.31 s on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 10:30:29,772 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 18 [2021-01-06 10:30:30,046 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:30:30,053 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:30:30,059 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:30:30,062 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:30:32,129 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 17 [2021-01-06 10:30:34,210 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 19 [2021-01-06 10:30:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-01-06 10:30:34,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888097696] [2021-01-06 10:30:34,306 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:34,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653287383] [2021-01-06 10:30:34,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:34,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:30:34,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580602613] [2021-01-06 10:30:34,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:30:34,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:34,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:30:34,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:30:34,309 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 7 states. [2021-01-06 10:30:41,544 WARN L197 SmtUtils]: Spent 7.15 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-01-06 10:30:49,507 WARN L197 SmtUtils]: Spent 7.93 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-01-06 10:30:57,984 WARN L197 SmtUtils]: Spent 8.37 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-01-06 10:31:02,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:02,501 INFO L93 Difference]: Finished difference Result 197 states and 227 transitions. [2021-01-06 10:31:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:31:02,505 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2021-01-06 10:31:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:02,508 INFO L225 Difference]: With dead ends: 197 [2021-01-06 10:31:02,508 INFO L226 Difference]: Without dead ends: 164 [2021-01-06 10:31:02,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:31:02,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-01-06 10:31:02,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 105. [2021-01-06 10:31:02,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 10:31:02,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2021-01-06 10:31:02,521 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 86 [2021-01-06 10:31:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:02,521 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2021-01-06 10:31:02,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:31:02,521 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2021-01-06 10:31:02,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 10:31:02,522 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:02,522 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:02,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:31:02,737 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:02,737 INFO L82 PathProgramCache]: Analyzing trace with hash -459469228, now seen corresponding path program 1 times [2021-01-06 10:31:02,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:02,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227804505] [2021-01-06 10:31:02,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:02,752 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:02,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490201300] [2021-01-06 10:31:02,753 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 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 [2021-01-06 10:31:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:02,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:31:02,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:31:03,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227804505] [2021-01-06 10:31:03,393 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:03,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490201300] [2021-01-06 10:31:03,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:03,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 10:31:03,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456888218] [2021-01-06 10:31:03,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:31:03,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:03,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:31:03,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:31:03,395 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 16 states. [2021-01-06 10:31:03,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:03,957 INFO L93 Difference]: Finished difference Result 515 states and 604 transitions. [2021-01-06 10:31:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:31:03,959 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2021-01-06 10:31:03,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:03,962 INFO L225 Difference]: With dead ends: 515 [2021-01-06 10:31:03,963 INFO L226 Difference]: Without dead ends: 466 [2021-01-06 10:31:03,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:31:03,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-01-06 10:31:03,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 115. [2021-01-06 10:31:03,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 10:31:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2021-01-06 10:31:03,981 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 91 [2021-01-06 10:31:03,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:03,981 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2021-01-06 10:31:03,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:31:03,982 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2021-01-06 10:31:03,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:31:03,983 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:03,983 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:04,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:04,197 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:04,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:04,197 INFO L82 PathProgramCache]: Analyzing trace with hash -830076044, now seen corresponding path program 2 times [2021-01-06 10:31:04,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:04,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655452054] [2021-01-06 10:31:04,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:04,207 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:04,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271072252] [2021-01-06 10:31:04,207 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 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 [2021-01-06 10:31:04,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:31:04,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:04,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:31:04,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:31:05,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655452054] [2021-01-06 10:31:05,094 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:05,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271072252] [2021-01-06 10:31:05,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:05,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-01-06 10:31:05,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459491027] [2021-01-06 10:31:05,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:31:05,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:05,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:31:05,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:31:05,097 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand 18 states. [2021-01-06 10:31:05,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:05,722 INFO L93 Difference]: Finished difference Result 589 states and 690 transitions. [2021-01-06 10:31:05,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:31:05,723 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2021-01-06 10:31:05,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:05,726 INFO L225 Difference]: With dead ends: 589 [2021-01-06 10:31:05,726 INFO L226 Difference]: Without dead ends: 540 [2021-01-06 10:31:05,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:31:05,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-01-06 10:31:05,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 125. [2021-01-06 10:31:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 10:31:05,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2021-01-06 10:31:05,744 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 101 [2021-01-06 10:31:05,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:05,744 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2021-01-06 10:31:05,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:31:05,744 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2021-01-06 10:31:05,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 10:31:05,745 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:05,746 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:05,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:31:05,951 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:05,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:05,951 INFO L82 PathProgramCache]: Analyzing trace with hash 397222036, now seen corresponding path program 3 times [2021-01-06 10:31:05,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:05,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209856740] [2021-01-06 10:31:05,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:05,960 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:05,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281806683] [2021-01-06 10:31:05,961 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 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 [2021-01-06 10:31:06,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:31:06,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:06,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:31:06,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:06,390 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 17 treesize of output 13 [2021-01-06 10:31:06,391 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:06,407 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:06,408 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:06,408 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2021-01-06 10:31:06,446 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-01-06 10:31:06,447 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:06,463 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:06,464 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:06,464 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:12 [2021-01-06 10:31:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2021-01-06 10:31:06,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209856740] [2021-01-06 10:31:06,625 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:06,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281806683] [2021-01-06 10:31:06,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:06,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:31:06,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658752477] [2021-01-06 10:31:06,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:31:06,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:06,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:31:06,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:31:06,627 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand 9 states. [2021-01-06 10:31:06,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:06,946 INFO L93 Difference]: Finished difference Result 171 states and 191 transitions. [2021-01-06 10:31:06,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:31:06,947 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 111 [2021-01-06 10:31:06,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:06,948 INFO L225 Difference]: With dead ends: 171 [2021-01-06 10:31:06,948 INFO L226 Difference]: Without dead ends: 138 [2021-01-06 10:31:06,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:31:06,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-06 10:31:06,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 127. [2021-01-06 10:31:06,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 10:31:06,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 139 transitions. [2021-01-06 10:31:06,963 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 139 transitions. Word has length 111 [2021-01-06 10:31:06,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:06,963 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 139 transitions. [2021-01-06 10:31:06,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:31:06,963 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 139 transitions. [2021-01-06 10:31:06,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 10:31:06,964 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:06,964 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:07,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:31:07,169 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:07,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:07,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1783425430, now seen corresponding path program 1 times [2021-01-06 10:31:07,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:07,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271001435] [2021-01-06 10:31:07,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:07,178 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:07,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675496188] [2021-01-06 10:31:07,178 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 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 [2021-01-06 10:31:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:07,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:31:07,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:31:08,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271001435] [2021-01-06 10:31:08,029 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:08,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675496188] [2021-01-06 10:31:08,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:08,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-01-06 10:31:08,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379570926] [2021-01-06 10:31:08,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:31:08,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:08,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:31:08,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:31:08,032 INFO L87 Difference]: Start difference. First operand 127 states and 139 transitions. Second operand 20 states. [2021-01-06 10:31:08,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:08,699 INFO L93 Difference]: Finished difference Result 667 states and 780 transitions. [2021-01-06 10:31:08,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:31:08,700 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 111 [2021-01-06 10:31:08,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:08,706 INFO L225 Difference]: With dead ends: 667 [2021-01-06 10:31:08,706 INFO L226 Difference]: Without dead ends: 616 [2021-01-06 10:31:08,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:31:08,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-01-06 10:31:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 137. [2021-01-06 10:31:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 10:31:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 149 transitions. [2021-01-06 10:31:08,725 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 149 transitions. Word has length 111 [2021-01-06 10:31:08,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:08,726 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 149 transitions. [2021-01-06 10:31:08,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:31:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 149 transitions. [2021-01-06 10:31:08,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-01-06 10:31:08,727 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:08,727 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:08,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:31:08,941 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:08,941 INFO L82 PathProgramCache]: Analyzing trace with hash 234100406, now seen corresponding path program 2 times [2021-01-06 10:31:08,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:08,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087459934] [2021-01-06 10:31:08,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:08,949 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:08,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701068128] [2021-01-06 10:31:08,950 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 [2021-01-06 10:31:09,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:31:09,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:09,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:31:09,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:31:10,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087459934] [2021-01-06 10:31:10,001 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:10,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701068128] [2021-01-06 10:31:10,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:10,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-01-06 10:31:10,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479250444] [2021-01-06 10:31:10,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:31:10,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:10,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:31:10,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:31:10,005 INFO L87 Difference]: Start difference. First operand 137 states and 149 transitions. Second operand 22 states. [2021-01-06 10:31:10,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:10,797 INFO L93 Difference]: Finished difference Result 741 states and 866 transitions. [2021-01-06 10:31:10,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:31:10,798 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2021-01-06 10:31:10,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:10,802 INFO L225 Difference]: With dead ends: 741 [2021-01-06 10:31:10,802 INFO L226 Difference]: Without dead ends: 690 [2021-01-06 10:31:10,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:31:10,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-01-06 10:31:10,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 147. [2021-01-06 10:31:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-01-06 10:31:10,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 159 transitions. [2021-01-06 10:31:10,823 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 159 transitions. Word has length 121 [2021-01-06 10:31:10,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:10,824 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 159 transitions. [2021-01-06 10:31:10,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:31:10,824 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 159 transitions. [2021-01-06 10:31:10,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-01-06 10:31:10,825 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:10,825 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:11,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:31:11,040 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:11,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:11,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1558010838, now seen corresponding path program 3 times [2021-01-06 10:31:11,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:11,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257924000] [2021-01-06 10:31:11,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:11,049 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:11,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724006917] [2021-01-06 10:31:11,050 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 [2021-01-06 10:31:11,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:31:11,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:11,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:31:11,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:11,390 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:31:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 165 proven. 4 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-01-06 10:31:11,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257924000] [2021-01-06 10:31:11,542 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:11,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724006917] [2021-01-06 10:31:11,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:11,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:31:11,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277490521] [2021-01-06 10:31:11,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:31:11,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:11,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:31:11,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:31:11,544 INFO L87 Difference]: Start difference. First operand 147 states and 159 transitions. Second operand 7 states. [2021-01-06 10:31:11,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:11,889 INFO L93 Difference]: Finished difference Result 231 states and 263 transitions. [2021-01-06 10:31:11,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:31:11,891 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2021-01-06 10:31:11,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:11,892 INFO L225 Difference]: With dead ends: 231 [2021-01-06 10:31:11,892 INFO L226 Difference]: Without dead ends: 198 [2021-01-06 10:31:11,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:31:11,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-01-06 10:31:11,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 157. [2021-01-06 10:31:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 10:31:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 174 transitions. [2021-01-06 10:31:11,915 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 174 transitions. Word has length 131 [2021-01-06 10:31:11,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:11,915 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 174 transitions. [2021-01-06 10:31:11,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:31:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 174 transitions. [2021-01-06 10:31:11,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 10:31:11,916 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:11,917 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 19, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:12,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:31:12,130 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:12,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:12,131 INFO L82 PathProgramCache]: Analyzing trace with hash -775227217, now seen corresponding path program 4 times [2021-01-06 10:31:12,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:12,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268671133] [2021-01-06 10:31:12,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:12,141 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:12,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194256406] [2021-01-06 10:31:12,141 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 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 [2021-01-06 10:31:12,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:31:12,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:12,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 10:31:12,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:31:13,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268671133] [2021-01-06 10:31:13,473 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:13,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194256406] [2021-01-06 10:31:13,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:13,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-01-06 10:31:13,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668299796] [2021-01-06 10:31:13,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:31:13,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:13,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:31:13,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:31:13,475 INFO L87 Difference]: Start difference. First operand 157 states and 174 transitions. Second operand 25 states. [2021-01-06 10:31:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:14,334 INFO L93 Difference]: Finished difference Result 872 states and 1026 transitions. [2021-01-06 10:31:14,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:31:14,335 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 136 [2021-01-06 10:31:14,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:14,339 INFO L225 Difference]: With dead ends: 872 [2021-01-06 10:31:14,340 INFO L226 Difference]: Without dead ends: 811 [2021-01-06 10:31:14,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:31:14,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-01-06 10:31:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 172. [2021-01-06 10:31:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2021-01-06 10:31:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 189 transitions. [2021-01-06 10:31:14,366 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 189 transitions. Word has length 136 [2021-01-06 10:31:14,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:14,366 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 189 transitions. [2021-01-06 10:31:14,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:31:14,367 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 189 transitions. [2021-01-06 10:31:14,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-01-06 10:31:14,368 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:14,368 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 22, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:14,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:14,569 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:14,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:14,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1212167450, now seen corresponding path program 5 times [2021-01-06 10:31:14,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:14,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327206984] [2021-01-06 10:31:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:14,579 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:14,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086102890] [2021-01-06 10:31:14,579 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 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 [2021-01-06 10:31:16,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-01-06 10:31:16,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:16,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:31:16,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1450 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:31:17,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327206984] [2021-01-06 10:31:17,919 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:17,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086102890] [2021-01-06 10:31:17,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:17,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-01-06 10:31:17,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086599547] [2021-01-06 10:31:17,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:31:17,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:17,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:31:17,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:31:17,922 INFO L87 Difference]: Start difference. First operand 172 states and 189 transitions. Second operand 28 states. [2021-01-06 10:31:18,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:18,928 INFO L93 Difference]: Finished difference Result 983 states and 1155 transitions. [2021-01-06 10:31:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:31:18,929 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2021-01-06 10:31:18,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:18,932 INFO L225 Difference]: With dead ends: 983 [2021-01-06 10:31:18,932 INFO L226 Difference]: Without dead ends: 922 [2021-01-06 10:31:18,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:31:18,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-01-06 10:31:18,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 187. [2021-01-06 10:31:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-01-06 10:31:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 204 transitions. [2021-01-06 10:31:18,957 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 204 transitions. Word has length 151 [2021-01-06 10:31:18,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:18,957 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 204 transitions. [2021-01-06 10:31:18,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:31:18,957 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 204 transitions. [2021-01-06 10:31:18,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 10:31:18,958 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:18,959 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 25, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:19,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:19,170 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:19,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:19,171 INFO L82 PathProgramCache]: Analyzing trace with hash -249350833, now seen corresponding path program 6 times [2021-01-06 10:31:19,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:19,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003347612] [2021-01-06 10:31:19,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:19,183 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:19,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337542445] [2021-01-06 10:31:19,184 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 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 [2021-01-06 10:31:19,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:31:19,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:19,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:31:19,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:19,662 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:31:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 341 proven. 13 refuted. 0 times theorem prover too weak. 1474 trivial. 0 not checked. [2021-01-06 10:31:19,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003347612] [2021-01-06 10:31:19,856 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:19,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337542445] [2021-01-06 10:31:19,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:19,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:31:19,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774512952] [2021-01-06 10:31:19,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:31:19,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:19,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:31:19,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:31:19,858 INFO L87 Difference]: Start difference. First operand 187 states and 204 transitions. Second operand 8 states. [2021-01-06 10:31:20,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:20,289 INFO L93 Difference]: Finished difference Result 299 states and 341 transitions. [2021-01-06 10:31:20,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:31:20,290 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 166 [2021-01-06 10:31:20,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:20,292 INFO L225 Difference]: With dead ends: 299 [2021-01-06 10:31:20,292 INFO L226 Difference]: Without dead ends: 266 [2021-01-06 10:31:20,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:31:20,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-01-06 10:31:20,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 201. [2021-01-06 10:31:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2021-01-06 10:31:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 222 transitions. [2021-01-06 10:31:20,312 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 222 transitions. Word has length 166 [2021-01-06 10:31:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:20,312 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 222 transitions. [2021-01-06 10:31:20,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:31:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 222 transitions. [2021-01-06 10:31:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-01-06 10:31:20,313 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:20,314 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 26, 25, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:20,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-06 10:31:20,520 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:20,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:20,520 INFO L82 PathProgramCache]: Analyzing trace with hash 985604822, now seen corresponding path program 7 times [2021-01-06 10:31:20,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:20,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192494134] [2021-01-06 10:31:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:20,529 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:20,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489842298] [2021-01-06 10:31:20,529 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 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 [2021-01-06 10:31:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:20,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 10:31:20,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:31:22,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192494134] [2021-01-06 10:31:22,352 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:22,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489842298] [2021-01-06 10:31:22,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:22,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-01-06 10:31:22,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430040633] [2021-01-06 10:31:22,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:31:22,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:22,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:31:22,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:31:22,355 INFO L87 Difference]: Start difference. First operand 201 states and 222 transitions. Second operand 32 states. [2021-01-06 10:31:23,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:23,595 INFO L93 Difference]: Finished difference Result 1159 states and 1364 transitions. [2021-01-06 10:31:23,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:31:23,597 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 171 [2021-01-06 10:31:23,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:23,603 INFO L225 Difference]: With dead ends: 1159 [2021-01-06 10:31:23,603 INFO L226 Difference]: Without dead ends: 1084 [2021-01-06 10:31:23,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:31:23,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-01-06 10:31:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 221. [2021-01-06 10:31:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2021-01-06 10:31:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 242 transitions. [2021-01-06 10:31:23,635 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 242 transitions. Word has length 171 [2021-01-06 10:31:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:23,635 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 242 transitions. [2021-01-06 10:31:23,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:31:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 242 transitions. [2021-01-06 10:31:23,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-01-06 10:31:23,637 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:23,637 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 30, 29, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:23,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:23,848 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:23,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:23,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1949349142, now seen corresponding path program 8 times [2021-01-06 10:31:23,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:23,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873107237] [2021-01-06 10:31:23,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:23,857 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:23,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724749565] [2021-01-06 10:31:23,858 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 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 [2021-01-06 10:31:24,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:31:24,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:24,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 10:31:24,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2558 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:31:26,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873107237] [2021-01-06 10:31:26,139 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:26,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724749565] [2021-01-06 10:31:26,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:26,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-01-06 10:31:26,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108253379] [2021-01-06 10:31:26,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:31:26,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:26,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:31:26,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:31:26,147 INFO L87 Difference]: Start difference. First operand 221 states and 242 transitions. Second operand 36 states. [2021-01-06 10:31:27,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:27,948 INFO L93 Difference]: Finished difference Result 1307 states and 1536 transitions. [2021-01-06 10:31:27,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 10:31:27,951 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 191 [2021-01-06 10:31:27,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:27,957 INFO L225 Difference]: With dead ends: 1307 [2021-01-06 10:31:27,958 INFO L226 Difference]: Without dead ends: 1232 [2021-01-06 10:31:27,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:31:27,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-01-06 10:31:27,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 241. [2021-01-06 10:31:27,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2021-01-06 10:31:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 262 transitions. [2021-01-06 10:31:27,994 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 262 transitions. Word has length 191 [2021-01-06 10:31:27,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:27,995 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 262 transitions. [2021-01-06 10:31:27,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:31:27,995 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 262 transitions. [2021-01-06 10:31:27,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-01-06 10:31:27,997 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:27,997 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 34, 33, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:28,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 10:31:28,212 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:28,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:28,212 INFO L82 PathProgramCache]: Analyzing trace with hash -312301738, now seen corresponding path program 9 times [2021-01-06 10:31:28,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:28,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962910994] [2021-01-06 10:31:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:28,223 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:28,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070457996] [2021-01-06 10:31:28,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-06 10:31:28,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:31:28,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:28,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 10:31:28,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:28,593 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 17 treesize of output 13 [2021-01-06 10:31:28,594 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:28,615 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:28,616 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:28,617 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-01-06 10:31:28,662 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-06 10:31:28,663 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:28,678 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:28,679 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:28,679 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:13 [2021-01-06 10:31:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3232 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2021-01-06 10:31:29,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962910994] [2021-01-06 10:31:29,238 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:29,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070457996] [2021-01-06 10:31:29,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:29,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:31:29,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719952055] [2021-01-06 10:31:29,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:31:29,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:29,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:31:29,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:31:29,240 INFO L87 Difference]: Start difference. First operand 241 states and 262 transitions. Second operand 13 states. [2021-01-06 10:31:30,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:30,133 INFO L93 Difference]: Finished difference Result 255 states and 278 transitions. [2021-01-06 10:31:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:31:30,134 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 211 [2021-01-06 10:31:30,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:30,136 INFO L225 Difference]: With dead ends: 255 [2021-01-06 10:31:30,136 INFO L226 Difference]: Without dead ends: 253 [2021-01-06 10:31:30,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:31:30,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-01-06 10:31:30,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 246. [2021-01-06 10:31:30,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2021-01-06 10:31:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 268 transitions. [2021-01-06 10:31:30,161 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 268 transitions. Word has length 211 [2021-01-06 10:31:30,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:30,162 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 268 transitions. [2021-01-06 10:31:30,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:31:30,162 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 268 transitions. [2021-01-06 10:31:30,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-01-06 10:31:30,163 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:30,164 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 34, 33, 6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:30,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:30,370 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:30,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:30,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1054975878, now seen corresponding path program 10 times [2021-01-06 10:31:30,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:30,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000123478] [2021-01-06 10:31:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:30,383 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:30,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089154176] [2021-01-06 10:31:30,384 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 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 [2021-01-06 10:31:31,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:31:31,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:31,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:31:31,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:31:34,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000123478] [2021-01-06 10:31:34,168 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:34,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089154176] [2021-01-06 10:31:34,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:34,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-01-06 10:31:34,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964086029] [2021-01-06 10:31:34,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:31:34,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:34,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:31:34,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:31:34,171 INFO L87 Difference]: Start difference. First operand 246 states and 268 transitions. Second operand 40 states. [2021-01-06 10:31:35,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:35,946 INFO L93 Difference]: Finished difference Result 1621 states and 1907 transitions. [2021-01-06 10:31:35,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:31:35,948 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 216 [2021-01-06 10:31:35,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:35,954 INFO L225 Difference]: With dead ends: 1621 [2021-01-06 10:31:35,954 INFO L226 Difference]: Without dead ends: 1541 [2021-01-06 10:31:35,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:31:35,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2021-01-06 10:31:35,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 266. [2021-01-06 10:31:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2021-01-06 10:31:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 288 transitions. [2021-01-06 10:31:35,992 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 288 transitions. Word has length 216 [2021-01-06 10:31:35,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:35,993 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 288 transitions. [2021-01-06 10:31:35,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:31:35,993 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 288 transitions. [2021-01-06 10:31:35,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-01-06 10:31:35,995 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:35,995 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 38, 37, 6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:36,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 10:31:36,211 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:36,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:36,212 INFO L82 PathProgramCache]: Analyzing trace with hash 938831418, now seen corresponding path program 11 times [2021-01-06 10:31:36,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:36,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530240841] [2021-01-06 10:31:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:36,222 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:36,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626192913] [2021-01-06 10:31:36,222 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 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 [2021-01-06 10:31:40,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2021-01-06 10:31:40,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:40,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 10:31:40,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4010 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:31:43,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530240841] [2021-01-06 10:31:43,169 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:43,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626192913] [2021-01-06 10:31:43,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:43,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-01-06 10:31:43,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110216579] [2021-01-06 10:31:43,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 10:31:43,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:43,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 10:31:43,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:31:43,171 INFO L87 Difference]: Start difference. First operand 266 states and 288 transitions. Second operand 44 states. [2021-01-06 10:31:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:45,261 INFO L93 Difference]: Finished difference Result 1789 states and 2103 transitions. [2021-01-06 10:31:45,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 10:31:45,263 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 236 [2021-01-06 10:31:45,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:45,271 INFO L225 Difference]: With dead ends: 1789 [2021-01-06 10:31:45,272 INFO L226 Difference]: Without dead ends: 1709 [2021-01-06 10:31:45,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:31:45,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2021-01-06 10:31:45,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 286. [2021-01-06 10:31:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2021-01-06 10:31:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 308 transitions. [2021-01-06 10:31:45,320 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 308 transitions. Word has length 236 [2021-01-06 10:31:45,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:45,320 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 308 transitions. [2021-01-06 10:31:45,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 10:31:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 308 transitions. [2021-01-06 10:31:45,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-01-06 10:31:45,322 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:45,323 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 42, 41, 6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:45,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 10:31:45,537 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:45,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:45,537 INFO L82 PathProgramCache]: Analyzing trace with hash -601349126, now seen corresponding path program 12 times [2021-01-06 10:31:45,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:45,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259406372] [2021-01-06 10:31:45,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:45,547 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:45,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049611440] [2021-01-06 10:31:45,548 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 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 [2021-01-06 10:31:46,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:31:46,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:46,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:31:46,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:46,436 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 17 treesize of output 13 [2021-01-06 10:31:46,437 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:46,450 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:46,451 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:46,452 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:31:46,486 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-01-06 10:31:46,487 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:46,495 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:46,496 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:46,496 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2021-01-06 10:31:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4844 backedges. 1 proven. 591 refuted. 0 times theorem prover too weak. 4252 trivial. 0 not checked. [2021-01-06 10:31:46,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259406372] [2021-01-06 10:31:46,800 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:46,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049611440] [2021-01-06 10:31:46,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:46,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:31:46,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529422622] [2021-01-06 10:31:46,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:31:46,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:46,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:31:46,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:31:46,802 INFO L87 Difference]: Start difference. First operand 286 states and 308 transitions. Second operand 10 states. [2021-01-06 10:31:47,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:47,400 INFO L93 Difference]: Finished difference Result 425 states and 482 transitions. [2021-01-06 10:31:47,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:31:47,401 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 256 [2021-01-06 10:31:47,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:47,404 INFO L225 Difference]: With dead ends: 425 [2021-01-06 10:31:47,404 INFO L226 Difference]: Without dead ends: 345 [2021-01-06 10:31:47,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:31:47,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-01-06 10:31:47,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 292. [2021-01-06 10:31:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2021-01-06 10:31:47,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 309 transitions. [2021-01-06 10:31:47,449 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 309 transitions. Word has length 256 [2021-01-06 10:31:47,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:47,450 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 309 transitions. [2021-01-06 10:31:47,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:31:47,450 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 309 transitions. [2021-01-06 10:31:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-01-06 10:31:47,451 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:47,452 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 41, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:47,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 10:31:47,658 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:47,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1644230328, now seen corresponding path program 13 times [2021-01-06 10:31:47,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:47,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905104920] [2021-01-06 10:31:47,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:47,670 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:47,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067276519] [2021-01-06 10:31:47,671 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 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 [2021-01-06 10:31:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:47,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 10:31:47,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4844 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:31:51,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905104920] [2021-01-06 10:31:51,284 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:51,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067276519] [2021-01-06 10:31:51,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:51,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2021-01-06 10:31:51,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386957353] [2021-01-06 10:31:51,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 10:31:51,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:51,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 10:31:51,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:31:51,286 INFO L87 Difference]: Start difference. First operand 292 states and 309 transitions. Second operand 48 states. [2021-01-06 10:31:53,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:53,484 INFO L93 Difference]: Finished difference Result 1969 states and 2301 transitions. [2021-01-06 10:31:53,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 10:31:53,486 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 256 [2021-01-06 10:31:53,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:53,495 INFO L225 Difference]: With dead ends: 1969 [2021-01-06 10:31:53,495 INFO L226 Difference]: Without dead ends: 1883 [2021-01-06 10:31:53,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:31:53,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-01-06 10:31:53,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 312. [2021-01-06 10:31:53,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2021-01-06 10:31:53,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 329 transitions. [2021-01-06 10:31:53,544 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 329 transitions. Word has length 256 [2021-01-06 10:31:53,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:53,545 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 329 transitions. [2021-01-06 10:31:53,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 10:31:53,545 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 329 transitions. [2021-01-06 10:31:53,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-01-06 10:31:53,547 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:53,547 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 45, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:53,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 10:31:53,762 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:53,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:53,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1853928328, now seen corresponding path program 14 times [2021-01-06 10:31:53,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:53,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594803622] [2021-01-06 10:31:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:53,775 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:53,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541194487] [2021-01-06 10:31:53,775 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 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 [2021-01-06 10:31:54,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:31:54,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:54,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 10:31:54,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5758 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:31:58,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594803622] [2021-01-06 10:31:58,103 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:58,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541194487] [2021-01-06 10:31:58,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:58,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2021-01-06 10:31:58,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239366192] [2021-01-06 10:31:58,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 10:31:58,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:58,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 10:31:58,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 10:31:58,114 INFO L87 Difference]: Start difference. First operand 312 states and 329 transitions. Second operand 52 states. [2021-01-06 10:32:00,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:00,992 INFO L93 Difference]: Finished difference Result 2137 states and 2497 transitions. [2021-01-06 10:32:00,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 10:32:00,994 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 276 [2021-01-06 10:32:00,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:01,001 INFO L225 Difference]: With dead ends: 2137 [2021-01-06 10:32:01,001 INFO L226 Difference]: Without dead ends: 2051 [2021-01-06 10:32:01,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 10:32:01,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-01-06 10:32:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 332. [2021-01-06 10:32:01,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2021-01-06 10:32:01,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 349 transitions. [2021-01-06 10:32:01,051 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 349 transitions. Word has length 276 [2021-01-06 10:32:01,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:01,052 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 349 transitions. [2021-01-06 10:32:01,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 10:32:01,052 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 349 transitions. [2021-01-06 10:32:01,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-01-06 10:32:01,054 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:01,054 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 51, 49, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:01,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 10:32:01,270 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:01,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:01,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1379484216, now seen corresponding path program 15 times [2021-01-06 10:32:01,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:01,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123878593] [2021-01-06 10:32:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:01,282 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:01,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734355584] [2021-01-06 10:32:01,282 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 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 [2021-01-06 10:32:01,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:32:01,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:01,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:32:01,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:01,823 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:32:01,863 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:32:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6752 backedges. 919 proven. 27 refuted. 0 times theorem prover too weak. 5806 trivial. 0 not checked. [2021-01-06 10:32:02,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123878593] [2021-01-06 10:32:02,116 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:02,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734355584] [2021-01-06 10:32:02,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:02,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:32:02,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561107767] [2021-01-06 10:32:02,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:32:02,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:02,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:32:02,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:32:02,118 INFO L87 Difference]: Start difference. First operand 332 states and 349 transitions. Second operand 9 states. [2021-01-06 10:32:02,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:02,765 INFO L93 Difference]: Finished difference Result 461 states and 501 transitions. [2021-01-06 10:32:02,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:32:02,767 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 296 [2021-01-06 10:32:02,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:02,770 INFO L225 Difference]: With dead ends: 461 [2021-01-06 10:32:02,770 INFO L226 Difference]: Without dead ends: 423 [2021-01-06 10:32:02,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:32:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-01-06 10:32:02,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 327. [2021-01-06 10:32:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2021-01-06 10:32:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 343 transitions. [2021-01-06 10:32:02,811 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 343 transitions. Word has length 296 [2021-01-06 10:32:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:02,811 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 343 transitions. [2021-01-06 10:32:02,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:32:02,812 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 343 transitions. [2021-01-06 10:32:02,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-01-06 10:32:02,813 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:02,813 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 52, 49, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:03,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:03,019 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:03,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:03,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1841200170, now seen corresponding path program 16 times [2021-01-06 10:32:03,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:03,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107425267] [2021-01-06 10:32:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:03,031 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:03,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685642009] [2021-01-06 10:32:03,031 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 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 [2021-01-06 10:32:08,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:32:08,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:08,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 57 conjunts are in the unsatisfiable core [2021-01-06 10:32:08,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7279 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:32:13,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107425267] [2021-01-06 10:32:13,380 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:13,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685642009] [2021-01-06 10:32:13,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:13,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2021-01-06 10:32:13,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421577057] [2021-01-06 10:32:13,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-01-06 10:32:13,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:13,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-01-06 10:32:13,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 10:32:13,382 INFO L87 Difference]: Start difference. First operand 327 states and 343 transitions. Second operand 58 states. [2021-01-06 10:32:16,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:16,492 INFO L93 Difference]: Finished difference Result 2379 states and 2781 transitions. [2021-01-06 10:32:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-06 10:32:16,494 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 306 [2021-01-06 10:32:16,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:16,503 INFO L225 Difference]: With dead ends: 2379 [2021-01-06 10:32:16,503 INFO L226 Difference]: Without dead ends: 2298 [2021-01-06 10:32:16,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 10:32:16,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-01-06 10:32:16,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 357. [2021-01-06 10:32:16,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2021-01-06 10:32:16,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 373 transitions. [2021-01-06 10:32:16,559 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 373 transitions. Word has length 306 [2021-01-06 10:32:16,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:16,559 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 373 transitions. [2021-01-06 10:32:16,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2021-01-06 10:32:16,559 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 373 transitions. [2021-01-06 10:32:16,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-01-06 10:32:16,561 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:16,562 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 58, 55, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:16,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:16,778 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:16,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1586100342, now seen corresponding path program 17 times [2021-01-06 10:32:16,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:16,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276046884] [2021-01-06 10:32:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:16,790 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:16,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924171714] [2021-01-06 10:32:16,791 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 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