/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-lopstr16/partial_lesser_bound-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:12:07,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:12:07,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:12:07,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:12:07,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:12:07,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:12:07,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:12:07,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:12:07,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:12:07,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:12:07,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:12:07,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:12:07,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:12:07,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:12:07,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:12:07,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:12:07,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:12:07,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:12:07,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:12:07,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:12:07,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:12:07,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:12:07,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:12:07,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:12:07,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:12:07,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 01:12:07,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 01:12:07,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 01:12:07,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 01:12:07,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 01:12:07,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 01:12:07,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 01:12:07,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 01:12:07,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:12:07,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:12:07,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:12:07,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 01:12:07,694 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:12:07,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:12:07,699 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:12:07,699 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:12:07,699 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:12:07,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:12:07,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:12:07,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:12:07,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:12:07,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:12:07,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:12:07,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:12:07,703 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:12:07,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:12:07,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:12:07,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:12:07,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:12:07,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:12:07,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:12:07,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:12:07,705 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:12:07,705 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:12:07,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:12:07,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:12:07,706 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:12:07,706 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:12:08,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:12:08,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:12:08,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:12:08,206 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:12:08,207 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:12:08,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/partial_lesser_bound-1.i [2020-12-23 01:12:08,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ee1f7ff3e/863fa0d34eb74cb5879b6ef0ce388bb8/FLAGd53c51477 [2020-12-23 01:12:08,987 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:12:08,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-lopstr16/partial_lesser_bound-1.i [2020-12-23 01:12:08,997 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ee1f7ff3e/863fa0d34eb74cb5879b6ef0ce388bb8/FLAGd53c51477 [2020-12-23 01:12:09,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ee1f7ff3e/863fa0d34eb74cb5879b6ef0ce388bb8 [2020-12-23 01:12:09,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:12:09,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:12:09,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:12:09,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:12:09,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:12:09,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:12:09" (1/1) ... [2020-12-23 01:12:09,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6be20b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:09, skipping insertion in model container [2020-12-23 01:12:09,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:12:09" (1/1) ... [2020-12-23 01:12:09,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:12:09,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:12:09,678 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-lopstr16/partial_lesser_bound-1.i[822,835] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,GLOBAL]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,GLOBAL]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] [2020-12-23 01:12:09,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:12:09,710 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:12:09,727 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-lopstr16/partial_lesser_bound-1.i[822,835] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,GLOBAL]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,GLOBAL]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] [2020-12-23 01:12:09,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:12:09,760 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:12:09,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:09 WrapperNode [2020-12-23 01:12:09,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:12:09,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:12:09,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:12:09,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:12:09,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:09" (1/1) ... [2020-12-23 01:12:09,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:09" (1/1) ... [2020-12-23 01:12:09,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:12:09,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:12:09,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:12:09,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:12:09,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:09" (1/1) ... [2020-12-23 01:12:09,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:09" (1/1) ... [2020-12-23 01:12:09,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:09" (1/1) ... [2020-12-23 01:12:09,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:09" (1/1) ... [2020-12-23 01:12:09,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:09" (1/1) ... [2020-12-23 01:12:09,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:09" (1/1) ... [2020-12-23 01:12:09,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:09" (1/1) ... [2020-12-23 01:12:09,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:12:09,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:12:09,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:12:09,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:12:09,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:12:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:12:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:12:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 01:12:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:12:09,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:12:09,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 01:12:10,301 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:12:10,302 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 01:12:10,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:12:10 BoogieIcfgContainer [2020-12-23 01:12:10,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:12:10,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:12:10,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:12:10,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:12:10,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:12:09" (1/3) ... [2020-12-23 01:12:10,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26cbbd7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:12:10, skipping insertion in model container [2020-12-23 01:12:10,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:09" (2/3) ... [2020-12-23 01:12:10,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26cbbd7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:12:10, skipping insertion in model container [2020-12-23 01:12:10,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:12:10" (3/3) ... [2020-12-23 01:12:10,313 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_lesser_bound-1.i [2020-12-23 01:12:10,327 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:12:10,333 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:12:10,357 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:12:10,383 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:12:10,384 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:12:10,384 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:12:10,384 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:12:10,384 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:12:10,384 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:12:10,385 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:12:10,385 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:12:10,399 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-23 01:12:10,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 01:12:10,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:10,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:10,406 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:10,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:10,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2020-12-23 01:12:10,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:10,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096293671] [2020-12-23 01:12:10,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:10,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096293671] [2020-12-23 01:12:10,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:12:10,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:12:10,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265610888] [2020-12-23 01:12:10,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:12:10,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:10,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:12:10,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:12:10,632 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-12-23 01:12:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:10,706 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2020-12-23 01:12:10,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:12:10,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 01:12:10,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:10,719 INFO L225 Difference]: With dead ends: 42 [2020-12-23 01:12:10,719 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 01:12:10,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:12:10,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 01:12:10,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2020-12-23 01:12:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 01:12:10,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-23 01:12:10,762 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2020-12-23 01:12:10,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:10,763 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-23 01:12:10,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:12:10,763 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-23 01:12:10,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 01:12:10,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:10,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:10,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:12:10,765 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:10,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:10,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2020-12-23 01:12:10,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:10,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469085708] [2020-12-23 01:12:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 01:12:10,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469085708] [2020-12-23 01:12:10,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226930825] [2020-12-23 01:12:10,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:10,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 01:12:10,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 01:12:10,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:10,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 01:12:10,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897353342] [2020-12-23 01:12:11,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 01:12:11,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:11,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 01:12:11,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:12:11,006 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2020-12-23 01:12:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:11,123 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-12-23 01:12:11,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:12:11,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-23 01:12:11,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:11,125 INFO L225 Difference]: With dead ends: 45 [2020-12-23 01:12:11,125 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 01:12:11,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:12:11,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 01:12:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2020-12-23 01:12:11,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 01:12:11,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-23 01:12:11,135 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2020-12-23 01:12:11,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:11,136 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-23 01:12:11,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 01:12:11,136 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-23 01:12:11,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 01:12:11,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:11,137 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:11,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 01:12:11,352 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:11,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:11,354 INFO L82 PathProgramCache]: Analyzing trace with hash -799235507, now seen corresponding path program 2 times [2020-12-23 01:12:11,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:11,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436712285] [2020-12-23 01:12:11,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:11,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 01:12:11,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436712285] [2020-12-23 01:12:11,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552815772] [2020-12-23 01:12:11,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:11,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:12:11,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:11,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 01:12:11,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 01:12:11,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:11,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 01:12:11,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684712923] [2020-12-23 01:12:11,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 01:12:11,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:11,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 01:12:11,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:12:11,535 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-12-23 01:12:11,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:11,591 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-12-23 01:12:11,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 01:12:11,591 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-23 01:12:11,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:11,592 INFO L225 Difference]: With dead ends: 57 [2020-12-23 01:12:11,593 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 01:12:11,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:12:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 01:12:11,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 24. [2020-12-23 01:12:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 01:12:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-23 01:12:11,599 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-12-23 01:12:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:11,600 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-23 01:12:11,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 01:12:11,600 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-23 01:12:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 01:12:11,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:11,601 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:11,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:11,816 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:11,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1303246583, now seen corresponding path program 3 times [2020-12-23 01:12:11,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:11,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841969324] [2020-12-23 01:12:11,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 01:12:11,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841969324] [2020-12-23 01:12:11,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382077850] [2020-12-23 01:12:11,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:11,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 01:12:11,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:11,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 01:12:11,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 01:12:11,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:11,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 01:12:11,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635525768] [2020-12-23 01:12:11,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:12:11,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:11,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:12:11,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:12:11,980 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-12-23 01:12:12,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:12,043 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-12-23 01:12:12,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 01:12:12,044 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-12-23 01:12:12,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:12,045 INFO L225 Difference]: With dead ends: 69 [2020-12-23 01:12:12,045 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 01:12:12,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:12:12,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 01:12:12,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 28. [2020-12-23 01:12:12,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 01:12:12,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-23 01:12:12,052 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2020-12-23 01:12:12,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:12,053 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-23 01:12:12,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:12:12,053 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-23 01:12:12,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 01:12:12,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:12,054 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:12,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:12,268 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:12,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:12,269 INFO L82 PathProgramCache]: Analyzing trace with hash -318070331, now seen corresponding path program 4 times [2020-12-23 01:12:12,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:12,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982982725] [2020-12-23 01:12:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 01:12:12,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982982725] [2020-12-23 01:12:12,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558999633] [2020-12-23 01:12:12,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:12,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:12:12,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:12,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:12:12,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 01:12:12,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:12,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 01:12:12,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528292369] [2020-12-23 01:12:12,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 01:12:12,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:12,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 01:12:12,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:12:12,504 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-12-23 01:12:12,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:12,590 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-12-23 01:12:12,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:12:12,591 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-12-23 01:12:12,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:12,592 INFO L225 Difference]: With dead ends: 81 [2020-12-23 01:12:12,592 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 01:12:12,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:12:12,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 01:12:12,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2020-12-23 01:12:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 01:12:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-23 01:12:12,599 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2020-12-23 01:12:12,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:12,600 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-23 01:12:12,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 01:12:12,600 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-23 01:12:12,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 01:12:12,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:12,601 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:12,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:12,817 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:12,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:12,819 INFO L82 PathProgramCache]: Analyzing trace with hash 2015456385, now seen corresponding path program 5 times [2020-12-23 01:12:12,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:12,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820873053] [2020-12-23 01:12:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 01:12:12,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820873053] [2020-12-23 01:12:12,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403001324] [2020-12-23 01:12:12,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:13,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 01:12:13,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:13,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 01:12:13,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 01:12:13,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:13,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 01:12:13,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497143977] [2020-12-23 01:12:13,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:12:13,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:13,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:12:13,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:12:13,140 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2020-12-23 01:12:13,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:13,235 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2020-12-23 01:12:13,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:12:13,235 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-23 01:12:13,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:13,239 INFO L225 Difference]: With dead ends: 93 [2020-12-23 01:12:13,239 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 01:12:13,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:12:13,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 01:12:13,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 36. [2020-12-23 01:12:13,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 01:12:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-23 01:12:13,258 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2020-12-23 01:12:13,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:13,259 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-23 01:12:13,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:12:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-23 01:12:13,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 01:12:13,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:13,262 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:13,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 01:12:13,477 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:13,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:13,480 INFO L82 PathProgramCache]: Analyzing trace with hash -189699779, now seen corresponding path program 6 times [2020-12-23 01:12:13,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:13,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341186646] [2020-12-23 01:12:13,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 01:12:13,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341186646] [2020-12-23 01:12:13,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824615982] [2020-12-23 01:12:13,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:13,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 01:12:13,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:13,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:12:13,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 01:12:13,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:13,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 01:12:13,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379285316] [2020-12-23 01:12:13,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 01:12:13,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:13,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 01:12:13,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:12:13,821 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2020-12-23 01:12:13,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:13,897 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2020-12-23 01:12:13,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:12:13,897 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-12-23 01:12:13,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:13,898 INFO L225 Difference]: With dead ends: 105 [2020-12-23 01:12:13,898 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 01:12:13,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:12:13,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 01:12:13,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 40. [2020-12-23 01:12:13,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 01:12:13,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-23 01:12:13,904 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2020-12-23 01:12:13,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:13,905 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-23 01:12:13,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 01:12:13,905 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-23 01:12:13,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 01:12:13,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:13,906 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:14,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:14,118 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:14,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:14,119 INFO L82 PathProgramCache]: Analyzing trace with hash 760584185, now seen corresponding path program 7 times [2020-12-23 01:12:14,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:14,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364131426] [2020-12-23 01:12:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 01:12:14,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364131426] [2020-12-23 01:12:14,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098085936] [2020-12-23 01:12:14,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:14,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 01:12:14,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 01:12:14,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:14,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 01:12:14,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388448495] [2020-12-23 01:12:14,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 01:12:14,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:14,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 01:12:14,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:12:14,304 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 11 states. [2020-12-23 01:12:14,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:14,410 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2020-12-23 01:12:14,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:12:14,411 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-12-23 01:12:14,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:14,412 INFO L225 Difference]: With dead ends: 117 [2020-12-23 01:12:14,414 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 01:12:14,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:12:14,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 01:12:14,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 44. [2020-12-23 01:12:14,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 01:12:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-23 01:12:14,428 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-12-23 01:12:14,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:14,430 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-23 01:12:14,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 01:12:14,431 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-23 01:12:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 01:12:14,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:14,434 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:14,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:14,650 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:14,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:14,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1775699787, now seen corresponding path program 8 times [2020-12-23 01:12:14,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:14,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393762821] [2020-12-23 01:12:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 01:12:14,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393762821] [2020-12-23 01:12:14,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035432577] [2020-12-23 01:12:14,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:14,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:12:14,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:14,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 01:12:14,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 01:12:14,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:14,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 01:12:14,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748856968] [2020-12-23 01:12:14,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 01:12:14,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:14,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 01:12:14,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:12:14,912 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-12-23 01:12:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:15,030 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2020-12-23 01:12:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:12:15,031 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-12-23 01:12:15,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:15,031 INFO L225 Difference]: With dead ends: 129 [2020-12-23 01:12:15,032 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 01:12:15,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:12:15,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 01:12:15,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 48. [2020-12-23 01:12:15,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 01:12:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-23 01:12:15,037 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 41 [2020-12-23 01:12:15,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:15,038 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-23 01:12:15,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 01:12:15,038 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-23 01:12:15,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 01:12:15,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:15,039 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:15,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 01:12:15,254 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:15,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:15,256 INFO L82 PathProgramCache]: Analyzing trace with hash -859403407, now seen corresponding path program 9 times [2020-12-23 01:12:15,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:15,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260634329] [2020-12-23 01:12:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-23 01:12:15,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260634329] [2020-12-23 01:12:15,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826064321] [2020-12-23 01:12:15,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:15,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 01:12:15,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:15,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 01:12:15,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-23 01:12:15,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:15,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 01:12:15,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631756722] [2020-12-23 01:12:15,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:12:15,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:15,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:12:15,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:12:15,797 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 13 states. [2020-12-23 01:12:15,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:15,930 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2020-12-23 01:12:15,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 01:12:15,931 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-12-23 01:12:15,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:15,932 INFO L225 Difference]: With dead ends: 141 [2020-12-23 01:12:15,932 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 01:12:15,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:12:15,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 01:12:15,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 52. [2020-12-23 01:12:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 01:12:15,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-12-23 01:12:15,937 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2020-12-23 01:12:15,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:15,937 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-12-23 01:12:15,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:12:15,938 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-12-23 01:12:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 01:12:15,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:15,939 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:16,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:16,152 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:16,154 INFO L82 PathProgramCache]: Analyzing trace with hash 407457837, now seen corresponding path program 10 times [2020-12-23 01:12:16,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:16,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686897057] [2020-12-23 01:12:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 01:12:16,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686897057] [2020-12-23 01:12:16,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106673067] [2020-12-23 01:12:16,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:16,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:12:16,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:16,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 01:12:16,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 01:12:16,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:16,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 01:12:16,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293265066] [2020-12-23 01:12:16,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 01:12:16,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:16,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 01:12:16,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:12:16,521 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 14 states. [2020-12-23 01:12:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:16,682 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2020-12-23 01:12:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 01:12:16,682 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-12-23 01:12:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:16,683 INFO L225 Difference]: With dead ends: 153 [2020-12-23 01:12:16,683 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 01:12:16,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:12:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 01:12:16,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 56. [2020-12-23 01:12:16,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 01:12:16,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-12-23 01:12:16,691 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2020-12-23 01:12:16,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:16,692 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-12-23 01:12:16,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 01:12:16,692 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-12-23 01:12:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 01:12:16,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:16,696 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:16,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:16,912 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:16,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:16,913 INFO L82 PathProgramCache]: Analyzing trace with hash -380877079, now seen corresponding path program 11 times [2020-12-23 01:12:16,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:16,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329618577] [2020-12-23 01:12:16,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 01:12:17,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329618577] [2020-12-23 01:12:17,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143360450] [2020-12-23 01:12:17,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:17,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 01:12:17,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:17,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 01:12:17,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 01:12:17,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:17,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 01:12:17,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364494631] [2020-12-23 01:12:17,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 01:12:17,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:17,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 01:12:17,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:12:17,813 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 15 states. [2020-12-23 01:12:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:17,984 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2020-12-23 01:12:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 01:12:17,984 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-12-23 01:12:17,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:17,986 INFO L225 Difference]: With dead ends: 165 [2020-12-23 01:12:17,986 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 01:12:17,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:12:17,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 01:12:17,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 60. [2020-12-23 01:12:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 01:12:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-12-23 01:12:17,993 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2020-12-23 01:12:17,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:17,993 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-12-23 01:12:17,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 01:12:17,994 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-12-23 01:12:17,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 01:12:17,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:17,994 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:18,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 01:12:18,208 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:18,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:18,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1508536229, now seen corresponding path program 12 times [2020-12-23 01:12:18,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:18,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114773222] [2020-12-23 01:12:18,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 01:12:18,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114773222] [2020-12-23 01:12:18,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664436844] [2020-12-23 01:12:18,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:19,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 01:12:19,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:19,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 01:12:19,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 01:12:19,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:19,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 01:12:19,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267854175] [2020-12-23 01:12:19,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 01:12:19,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:19,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 01:12:19,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:12:19,709 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 16 states. [2020-12-23 01:12:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:19,883 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2020-12-23 01:12:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 01:12:19,883 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-12-23 01:12:19,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:19,884 INFO L225 Difference]: With dead ends: 177 [2020-12-23 01:12:19,884 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 01:12:19,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:12:19,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 01:12:19,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 64. [2020-12-23 01:12:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 01:12:19,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-12-23 01:12:19,909 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2020-12-23 01:12:19,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:19,909 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-12-23 01:12:19,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 01:12:19,912 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-12-23 01:12:19,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 01:12:19,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:19,913 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:20,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 01:12:20,114 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:20,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:20,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1380005279, now seen corresponding path program 13 times [2020-12-23 01:12:20,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:20,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276996758] [2020-12-23 01:12:20,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 01:12:20,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276996758] [2020-12-23 01:12:20,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804486616] [2020-12-23 01:12:20,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:20,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 01:12:20,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 01:12:20,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:20,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 01:12:20,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722880074] [2020-12-23 01:12:20,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 01:12:20,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:20,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 01:12:20,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:12:20,482 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-12-23 01:12:20,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:20,674 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2020-12-23 01:12:20,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 01:12:20,675 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-12-23 01:12:20,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:20,676 INFO L225 Difference]: With dead ends: 189 [2020-12-23 01:12:20,676 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 01:12:20,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:12:20,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 01:12:20,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 68. [2020-12-23 01:12:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 01:12:20,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-12-23 01:12:20,684 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2020-12-23 01:12:20,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:20,685 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-12-23 01:12:20,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 01:12:20,685 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-12-23 01:12:20,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 01:12:20,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:20,687 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:20,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 01:12:20,896 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:20,897 INFO L82 PathProgramCache]: Analyzing trace with hash -773564643, now seen corresponding path program 14 times [2020-12-23 01:12:20,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:20,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489679350] [2020-12-23 01:12:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-23 01:12:21,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489679350] [2020-12-23 01:12:21,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021156053] [2020-12-23 01:12:21,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:21,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:12:21,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:21,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:12:21,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-23 01:12:21,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:21,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 01:12:21,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116234218] [2020-12-23 01:12:21,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 01:12:21,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:21,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 01:12:21,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:12:21,282 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 18 states. [2020-12-23 01:12:21,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:21,478 INFO L93 Difference]: Finished difference Result 201 states and 206 transitions. [2020-12-23 01:12:21,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 01:12:21,479 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2020-12-23 01:12:21,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:21,481 INFO L225 Difference]: With dead ends: 201 [2020-12-23 01:12:21,481 INFO L226 Difference]: Without dead ends: 164 [2020-12-23 01:12:21,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:12:21,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-23 01:12:21,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 72. [2020-12-23 01:12:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 01:12:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-12-23 01:12:21,496 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2020-12-23 01:12:21,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:21,496 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-12-23 01:12:21,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 01:12:21,496 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-12-23 01:12:21,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 01:12:21,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:21,497 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:21,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:21,706 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:21,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:21,707 INFO L82 PathProgramCache]: Analyzing trace with hash -587852327, now seen corresponding path program 15 times [2020-12-23 01:12:21,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:21,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008871679] [2020-12-23 01:12:21,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-23 01:12:21,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008871679] [2020-12-23 01:12:21,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563814554] [2020-12-23 01:12:21,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:23,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 01:12:23,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:23,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 01:12:23,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-23 01:12:23,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:23,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 01:12:23,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488645333] [2020-12-23 01:12:23,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 01:12:23,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:23,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 01:12:23,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:12:23,437 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 19 states. [2020-12-23 01:12:23,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:23,623 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2020-12-23 01:12:23,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 01:12:23,624 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2020-12-23 01:12:23,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:23,625 INFO L225 Difference]: With dead ends: 213 [2020-12-23 01:12:23,625 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 01:12:23,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:12:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 01:12:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 76. [2020-12-23 01:12:23,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 01:12:23,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-12-23 01:12:23,631 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2020-12-23 01:12:23,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:23,631 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-12-23 01:12:23,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 01:12:23,631 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-12-23 01:12:23,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 01:12:23,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:23,632 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:23,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 01:12:23,846 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:23,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:23,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1894840683, now seen corresponding path program 16 times [2020-12-23 01:12:23,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:23,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187613117] [2020-12-23 01:12:23,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 01:12:24,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187613117] [2020-12-23 01:12:24,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092238372] [2020-12-23 01:12:24,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:24,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:12:24,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:24,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 01:12:24,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 01:12:24,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:24,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 01:12:24,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450272565] [2020-12-23 01:12:24,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 01:12:24,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:24,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 01:12:24,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:12:24,281 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 20 states. [2020-12-23 01:12:24,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:24,475 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2020-12-23 01:12:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 01:12:24,475 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 73 [2020-12-23 01:12:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:24,476 INFO L225 Difference]: With dead ends: 225 [2020-12-23 01:12:24,477 INFO L226 Difference]: Without dead ends: 184 [2020-12-23 01:12:24,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:12:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-23 01:12:24,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 80. [2020-12-23 01:12:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 01:12:24,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-12-23 01:12:24,481 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-12-23 01:12:24,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:24,481 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-12-23 01:12:24,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 01:12:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-12-23 01:12:24,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 01:12:24,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:24,482 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:24,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 01:12:24,698 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:24,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:24,699 INFO L82 PathProgramCache]: Analyzing trace with hash -775280303, now seen corresponding path program 17 times [2020-12-23 01:12:24,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:24,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270606921] [2020-12-23 01:12:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-23 01:12:24,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270606921] [2020-12-23 01:12:24,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169200117] [2020-12-23 01:12:24,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:50,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 01:12:50,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:50,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 01:12:50,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-23 01:12:50,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:50,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 01:12:50,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528191514] [2020-12-23 01:12:50,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 01:12:50,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:50,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 01:12:50,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 01:12:50,317 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 21 states. [2020-12-23 01:12:50,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:50,530 INFO L93 Difference]: Finished difference Result 237 states and 242 transitions. [2020-12-23 01:12:50,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 01:12:50,530 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 77 [2020-12-23 01:12:50,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:50,531 INFO L225 Difference]: With dead ends: 237 [2020-12-23 01:12:50,532 INFO L226 Difference]: Without dead ends: 194 [2020-12-23 01:12:50,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 01:12:50,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-23 01:12:50,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 84. [2020-12-23 01:12:50,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 01:12:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-12-23 01:12:50,536 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 77 [2020-12-23 01:12:50,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:50,536 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-12-23 01:12:50,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 01:12:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-12-23 01:12:50,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 01:12:50,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:50,538 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:50,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 01:12:50,752 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:50,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:50,753 INFO L82 PathProgramCache]: Analyzing trace with hash 943881741, now seen corresponding path program 18 times [2020-12-23 01:12:50,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:50,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964495166] [2020-12-23 01:12:50,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 01:12:51,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964495166] [2020-12-23 01:12:51,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230581014] [2020-12-23 01:12:51,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:59,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 01:12:59,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:59,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 01:12:59,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 01:12:59,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:59,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 01:12:59,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268378266] [2020-12-23 01:12:59,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 01:12:59,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:59,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 01:12:59,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:12:59,589 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 22 states. [2020-12-23 01:12:59,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:59,821 INFO L93 Difference]: Finished difference Result 249 states and 254 transitions. [2020-12-23 01:12:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 01:12:59,822 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 81 [2020-12-23 01:12:59,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:59,823 INFO L225 Difference]: With dead ends: 249 [2020-12-23 01:12:59,823 INFO L226 Difference]: Without dead ends: 204 [2020-12-23 01:12:59,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:12:59,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-12-23 01:12:59,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 88. [2020-12-23 01:12:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 01:12:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-12-23 01:12:59,829 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 81 [2020-12-23 01:12:59,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:59,830 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-12-23 01:12:59,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 01:12:59,830 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-12-23 01:12:59,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 01:12:59,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:59,831 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:00,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:00,032 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:00,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:00,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2131952841, now seen corresponding path program 19 times [2020-12-23 01:13:00,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:00,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055966914] [2020-12-23 01:13:00,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-12-23 01:13:00,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055966914] [2020-12-23 01:13:00,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387271507] [2020-12-23 01:13:00,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:00,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 01:13:00,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-12-23 01:13:00,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:00,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 01:13:00,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833840667] [2020-12-23 01:13:00,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 01:13:00,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:00,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 01:13:00,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 01:13:00,501 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 23 states. [2020-12-23 01:13:00,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:00,741 INFO L93 Difference]: Finished difference Result 261 states and 266 transitions. [2020-12-23 01:13:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 01:13:00,741 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2020-12-23 01:13:00,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:00,743 INFO L225 Difference]: With dead ends: 261 [2020-12-23 01:13:00,744 INFO L226 Difference]: Without dead ends: 214 [2020-12-23 01:13:00,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 01:13:00,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-23 01:13:00,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 92. [2020-12-23 01:13:00,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 01:13:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-12-23 01:13:00,749 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 85 [2020-12-23 01:13:00,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:00,750 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-12-23 01:13:00,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 01:13:00,750 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-12-23 01:13:00,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 01:13:00,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:00,751 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:00,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:00,964 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:00,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:00,965 INFO L82 PathProgramCache]: Analyzing trace with hash 207011205, now seen corresponding path program 20 times [2020-12-23 01:13:00,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:00,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469250067] [2020-12-23 01:13:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-12-23 01:13:01,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469250067] [2020-12-23 01:13:01,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112258243] [2020-12-23 01:13:01,326 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:01,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:13:01,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:01,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 01:13:01,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-12-23 01:13:01,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:01,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 01:13:01,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430178063] [2020-12-23 01:13:01,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 01:13:01,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:01,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 01:13:01,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 01:13:01,518 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 24 states. [2020-12-23 01:13:01,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:01,769 INFO L93 Difference]: Finished difference Result 273 states and 278 transitions. [2020-12-23 01:13:01,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 01:13:01,769 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2020-12-23 01:13:01,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:01,771 INFO L225 Difference]: With dead ends: 273 [2020-12-23 01:13:01,771 INFO L226 Difference]: Without dead ends: 224 [2020-12-23 01:13:01,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 01:13:01,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-23 01:13:01,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 96. [2020-12-23 01:13:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 01:13:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-12-23 01:13:01,776 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 89 [2020-12-23 01:13:01,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:01,776 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-12-23 01:13:01,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 01:13:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-12-23 01:13:01,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 01:13:01,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:01,780 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:01,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 01:13:01,997 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:01,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:01,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1873324097, now seen corresponding path program 21 times [2020-12-23 01:13:01,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:01,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815134263] [2020-12-23 01:13:01,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-23 01:13:02,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815134263] [2020-12-23 01:13:02,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745624782] [2020-12-23 01:13:02,424 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:07,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 01:13:07,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:07,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 01:13:07,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-23 01:13:07,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:07,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 01:13:07,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508123331] [2020-12-23 01:13:07,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 01:13:07,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:07,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 01:13:07,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:13:07,856 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 25 states. [2020-12-23 01:13:08,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:08,104 INFO L93 Difference]: Finished difference Result 285 states and 290 transitions. [2020-12-23 01:13:08,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 01:13:08,105 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 93 [2020-12-23 01:13:08,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:08,106 INFO L225 Difference]: With dead ends: 285 [2020-12-23 01:13:08,106 INFO L226 Difference]: Without dead ends: 234 [2020-12-23 01:13:08,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:13:08,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-12-23 01:13:08,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 100. [2020-12-23 01:13:08,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 01:13:08,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-12-23 01:13:08,112 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2020-12-23 01:13:08,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:08,112 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-12-23 01:13:08,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 01:13:08,112 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-12-23 01:13:08,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 01:13:08,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:08,114 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:08,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 01:13:08,329 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:08,330 INFO L82 PathProgramCache]: Analyzing trace with hash -500972291, now seen corresponding path program 22 times [2020-12-23 01:13:08,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:08,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401061569] [2020-12-23 01:13:08,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-23 01:13:08,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401061569] [2020-12-23 01:13:08,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120600802] [2020-12-23 01:13:08,712 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:08,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:13:08,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:08,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 01:13:08,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-23 01:13:08,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:08,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 01:13:08,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706060712] [2020-12-23 01:13:08,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 01:13:08,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:08,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 01:13:08,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 01:13:08,894 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 26 states. [2020-12-23 01:13:09,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:09,179 INFO L93 Difference]: Finished difference Result 297 states and 302 transitions. [2020-12-23 01:13:09,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 01:13:09,179 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 97 [2020-12-23 01:13:09,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:09,181 INFO L225 Difference]: With dead ends: 297 [2020-12-23 01:13:09,181 INFO L226 Difference]: Without dead ends: 244 [2020-12-23 01:13:09,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 01:13:09,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-23 01:13:09,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 104. [2020-12-23 01:13:09,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 01:13:09,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-12-23 01:13:09,186 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 97 [2020-12-23 01:13:09,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:09,186 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-12-23 01:13:09,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 01:13:09,186 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-12-23 01:13:09,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 01:13:09,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:09,187 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:09,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:09,401 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:09,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:09,402 INFO L82 PathProgramCache]: Analyzing trace with hash -966585415, now seen corresponding path program 23 times [2020-12-23 01:13:09,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:09,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619634351] [2020-12-23 01:13:09,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-23 01:13:09,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619634351] [2020-12-23 01:13:09,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394554048] [2020-12-23 01:13:09,832 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:16:07,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 01:16:07,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:16:07,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 01:16:07,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:16:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-23 01:16:08,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:16:08,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 01:16:08,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398388640] [2020-12-23 01:16:08,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 01:16:08,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:16:08,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 01:16:08,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 01:16:08,054 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 27 states. [2020-12-23 01:16:08,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:16:08,362 INFO L93 Difference]: Finished difference Result 309 states and 314 transitions. [2020-12-23 01:16:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 01:16:08,362 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 101 [2020-12-23 01:16:08,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:16:08,364 INFO L225 Difference]: With dead ends: 309 [2020-12-23 01:16:08,364 INFO L226 Difference]: Without dead ends: 254 [2020-12-23 01:16:08,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 01:16:08,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-12-23 01:16:08,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 108. [2020-12-23 01:16:08,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 01:16:08,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-12-23 01:16:08,369 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 101 [2020-12-23 01:16:08,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:16:08,370 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-12-23 01:16:08,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 01:16:08,370 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-12-23 01:16:08,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-23 01:16:08,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:16:08,371 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:16:08,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 01:16:08,572 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:16:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:16:08,573 INFO L82 PathProgramCache]: Analyzing trace with hash 679580789, now seen corresponding path program 24 times [2020-12-23 01:16:08,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:16:08,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716160473] [2020-12-23 01:16:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:16:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:16:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-23 01:16:09,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716160473] [2020-12-23 01:16:09,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697191541] [2020-12-23 01:16:09,071 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 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