/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.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:05:52,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:05:52,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:05:52,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:05:52,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:05:52,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:05:52,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:05:52,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:05:52,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:05:52,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:05:52,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:05:52,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:05:52,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:05:52,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:05:52,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:05:52,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:05:52,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:05:52,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:05:52,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:05:52,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:05:52,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:05:52,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:05:52,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:05:52,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:05:52,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:05:52,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:05:52,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:05:52,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:05:52,409 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 11:05:52,474 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:05:52,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:05:52,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:05:52,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:05:52,484 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:05:52,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:05:52,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:05:52,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:05:52,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:05:52,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:05:52,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:05:52,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:05:52,486 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:05:52,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:05:52,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:05:52,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:05:52,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:05:52,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:05:52,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:05:52,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:05:52,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:05:52,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:05:52,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:05:52,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:05:52,491 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:05:52,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:05:52,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:05:53,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:05:53,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:05:53,038 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:05:53,041 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:05:53,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/partial_lesser_bound.i [2021-01-06 11:05:53,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3c7d1d094/cafcb53980d5404cae57371dbff78961/FLAG71fae0e1c [2021-01-06 11:05:54,011 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:05:54,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-lopstr16/partial_lesser_bound.i [2021-01-06 11:05:54,024 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3c7d1d094/cafcb53980d5404cae57371dbff78961/FLAG71fae0e1c [2021-01-06 11:05:54,318 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3c7d1d094/cafcb53980d5404cae57371dbff78961 [2021-01-06 11:05:54,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:05:54,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:05:54,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:05:54,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:05:54,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:05:54,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:05:54" (1/1) ... [2021-01-06 11:05:54,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@187f1cce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:54, skipping insertion in model container [2021-01-06 11:05:54,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:05:54" (1/1) ... [2021-01-06 11:05:54,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:05:54,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:05:54,549 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.i[813,826] 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] [2021-01-06 11:05:54,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:05:54,596 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:05:54,615 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-lopstr16/partial_lesser_bound.i[813,826] 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[8],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[8],IdentifierExpression[~i~0,GLOBAL]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] [2021-01-06 11:05:54,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:05:54,647 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:05:54,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:54 WrapperNode [2021-01-06 11:05:54,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:05:54,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:05:54,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:05:54,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:05:54,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:54" (1/1) ... [2021-01-06 11:05:54,674 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:54" (1/1) ... [2021-01-06 11:05:54,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:05:54,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:05:54,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:05:54,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:05:54,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:54" (1/1) ... [2021-01-06 11:05:54,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:54" (1/1) ... [2021-01-06 11:05:54,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:54" (1/1) ... [2021-01-06 11:05:54,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:54" (1/1) ... [2021-01-06 11:05:54,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:54" (1/1) ... [2021-01-06 11:05:54,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:54" (1/1) ... [2021-01-06 11:05:54,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:54" (1/1) ... [2021-01-06 11:05:54,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:05:54,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:05:54,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:05:54,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:05:54,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:05:54,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-01-06 11:05:54,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:05:54,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-01-06 11:05:54,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:05:54,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 11:05:54,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:05:54,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:05:55,286 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:05:55,287 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 11:05:55,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:05:55 BoogieIcfgContainer [2021-01-06 11:05:55,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:05:55,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:05:55,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:05:55,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:05:55,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:05:54" (1/3) ... [2021-01-06 11:05:55,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382affb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:05:55, skipping insertion in model container [2021-01-06 11:05:55,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:54" (2/3) ... [2021-01-06 11:05:55,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382affb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:05:55, skipping insertion in model container [2021-01-06 11:05:55,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:05:55" (3/3) ... [2021-01-06 11:05:55,302 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_lesser_bound.i [2021-01-06 11:05:55,310 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:05:55,316 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:05:55,345 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:05:55,379 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:05:55,379 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:05:55,379 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:05:55,379 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:05:55,380 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:05:55,380 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:05:55,380 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:05:55,380 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:05:55,398 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-01-06 11:05:55,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 11:05:55,405 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:55,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:55,407 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:55,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:55,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2021-01-06 11:05:55,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:55,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065296764] [2021-01-06 11:05:55,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:55,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065296764] [2021-01-06 11:05:55,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:05:55,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:05:55,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538799229] [2021-01-06 11:05:55,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:05:55,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:55,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:05:55,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:05:55,668 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2021-01-06 11:05:55,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:55,759 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2021-01-06 11:05:55,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:05:55,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 11:05:55,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:55,774 INFO L225 Difference]: With dead ends: 42 [2021-01-06 11:05:55,775 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 11:05:55,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:05:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 11:05:55,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2021-01-06 11:05:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 11:05:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-01-06 11:05:55,823 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2021-01-06 11:05:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:55,824 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-01-06 11:05:55,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:05:55,825 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-01-06 11:05:55,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 11:05:55,826 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:55,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:55,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:05:55,827 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:55,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:55,828 INFO L82 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2021-01-06 11:05:55,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:55,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779555510] [2021-01-06 11:05:55,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:05:56,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779555510] [2021-01-06 11:05:56,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850989844] [2021-01-06 11:05:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:56,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 11:05:56,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:05:56,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:56,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 11:05:56,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860456625] [2021-01-06 11:05:56,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 11:05:56,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:56,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 11:05:56,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:05:56,270 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2021-01-06 11:05:56,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:56,370 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-01-06 11:05:56,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:05:56,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-01-06 11:05:56,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:56,372 INFO L225 Difference]: With dead ends: 45 [2021-01-06 11:05:56,372 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 11:05:56,374 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 [2021-01-06 11:05:56,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 11:05:56,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2021-01-06 11:05:56,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 11:05:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-01-06 11:05:56,380 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2021-01-06 11:05:56,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:56,381 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-01-06 11:05:56,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 11:05:56,381 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-01-06 11:05:56,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 11:05:56,382 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:56,382 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:56,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 11:05:56,597 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:56,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:56,599 INFO L82 PathProgramCache]: Analyzing trace with hash -799235507, now seen corresponding path program 2 times [2021-01-06 11:05:56,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:56,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139549885] [2021-01-06 11:05:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 11:05:56,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139549885] [2021-01-06 11:05:56,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741907372] [2021-01-06 11:05:56,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:56,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:05:56,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:56,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 11:05:56,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 11:05:56,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:56,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 11:05:56,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970215547] [2021-01-06 11:05:56,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 11:05:56,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:56,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 11:05:56,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 11:05:56,811 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2021-01-06 11:05:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:56,900 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-01-06 11:05:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 11:05:56,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2021-01-06 11:05:56,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:56,902 INFO L225 Difference]: With dead ends: 57 [2021-01-06 11:05:56,903 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 11:05:56,903 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 [2021-01-06 11:05:56,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 11:05:56,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 24. [2021-01-06 11:05:56,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 11:05:56,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-01-06 11:05:56,910 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2021-01-06 11:05:56,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:56,910 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-01-06 11:05:56,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 11:05:56,911 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-01-06 11:05:56,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 11:05:56,912 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:56,912 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:57,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:57,127 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:57,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:57,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1303246583, now seen corresponding path program 3 times [2021-01-06 11:05:57,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:57,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827012481] [2021-01-06 11:05:57,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 11:05:57,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827012481] [2021-01-06 11:05:57,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477750720] [2021-01-06 11:05:57,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:57,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 11:05:57,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:57,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 11:05:57,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 11:05:57,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:57,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 11:05:57,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802968269] [2021-01-06 11:05:57,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 11:05:57,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:57,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 11:05:57,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:05:57,375 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2021-01-06 11:05:57,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:57,474 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-01-06 11:05:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 11:05:57,475 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2021-01-06 11:05:57,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:57,476 INFO L225 Difference]: With dead ends: 69 [2021-01-06 11:05:57,476 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 11:05:57,477 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 [2021-01-06 11:05:57,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 11:05:57,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 28. [2021-01-06 11:05:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 11:05:57,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 11:05:57,485 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2021-01-06 11:05:57,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:57,485 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 11:05:57,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 11:05:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 11:05:57,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 11:05:57,486 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:57,487 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:57,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:57,703 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:57,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:57,706 INFO L82 PathProgramCache]: Analyzing trace with hash -318070331, now seen corresponding path program 4 times [2021-01-06 11:05:57,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:57,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572050728] [2021-01-06 11:05:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 11:05:57,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572050728] [2021-01-06 11:05:57,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059493183] [2021-01-06 11:05:57,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:57,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:05:57,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:57,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:05:57,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 11:05:58,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:58,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 11:05:58,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700132118] [2021-01-06 11:05:58,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 11:05:58,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:58,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 11:05:58,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:05:58,018 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2021-01-06 11:05:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:58,133 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-01-06 11:05:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 11:05:58,134 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2021-01-06 11:05:58,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:58,135 INFO L225 Difference]: With dead ends: 81 [2021-01-06 11:05:58,136 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 11:05:58,137 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 [2021-01-06 11:05:58,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 11:05:58,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2021-01-06 11:05:58,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 11:05:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-01-06 11:05:58,143 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2021-01-06 11:05:58,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:58,144 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-01-06 11:05:58,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 11:05:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-01-06 11:05:58,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 11:05:58,145 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:58,145 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:58,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:58,361 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:58,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:58,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2015456385, now seen corresponding path program 5 times [2021-01-06 11:05:58,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:58,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280035650] [2021-01-06 11:05:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 11:05:58,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280035650] [2021-01-06 11:05:58,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525792637] [2021-01-06 11:05:58,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:59,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 11:05:59,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:59,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 11:05:59,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 11:05:59,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:59,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 11:05:59,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983863612] [2021-01-06 11:05:59,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:05:59,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:59,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:05:59,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:05:59,724 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2021-01-06 11:05:59,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:59,871 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2021-01-06 11:05:59,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 11:05:59,872 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2021-01-06 11:05:59,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:59,877 INFO L225 Difference]: With dead ends: 93 [2021-01-06 11:05:59,877 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 11:05:59,883 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 [2021-01-06 11:05:59,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 11:05:59,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 36. [2021-01-06 11:05:59,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 11:05:59,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-01-06 11:05:59,903 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2021-01-06 11:05:59,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:59,904 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-01-06 11:05:59,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:05:59,904 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-01-06 11:05:59,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 11:05:59,905 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:59,906 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:00,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 11:06:00,121 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:00,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:00,122 INFO L82 PathProgramCache]: Analyzing trace with hash -189699779, now seen corresponding path program 6 times [2021-01-06 11:06:00,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:00,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290630052] [2021-01-06 11:06:00,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 11:06:00,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290630052] [2021-01-06 11:06:00,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153686031] [2021-01-06 11:06:00,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:00,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 11:06:00,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:00,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 11:06:00,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 11:06:00,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:00,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 11:06:00,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995012954] [2021-01-06 11:06:00,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:06:00,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:00,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:06:00,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:06:00,911 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2021-01-06 11:06:01,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:01,046 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2021-01-06 11:06:01,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:06:01,047 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2021-01-06 11:06:01,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:01,048 INFO L225 Difference]: With dead ends: 105 [2021-01-06 11:06:01,048 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 11:06:01,049 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 [2021-01-06 11:06:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 11:06:01,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 40. [2021-01-06 11:06:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 11:06:01,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-01-06 11:06:01,056 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2021-01-06 11:06:01,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:01,056 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-01-06 11:06:01,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:06:01,057 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-01-06 11:06:01,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 11:06:01,058 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:01,058 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:01,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:01,273 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:01,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:01,275 INFO L82 PathProgramCache]: Analyzing trace with hash 760584185, now seen corresponding path program 7 times [2021-01-06 11:06:01,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:01,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206085503] [2021-01-06 11:06:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 11:06:01,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206085503] [2021-01-06 11:06:01,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206663160] [2021-01-06 11:06:01,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:01,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 11:06:01,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 11:06:01,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:01,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 11:06:01,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689034782] [2021-01-06 11:06:01,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 11:06:01,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:01,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 11:06:01,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:06:01,629 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 11 states. [2021-01-06 11:06:01,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:01,791 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2021-01-06 11:06:01,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:06:01,792 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2021-01-06 11:06:01,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:01,793 INFO L225 Difference]: With dead ends: 117 [2021-01-06 11:06:01,793 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 11:06:01,794 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 [2021-01-06 11:06:01,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 11:06:01,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 44. [2021-01-06 11:06:01,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 11:06:01,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-01-06 11:06:01,817 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2021-01-06 11:06:01,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:01,818 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-01-06 11:06:01,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 11:06:01,818 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-01-06 11:06:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 11:06:01,819 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:01,820 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:02,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:02,036 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:02,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:02,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1775699787, now seen corresponding path program 8 times [2021-01-06 11:06:02,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:02,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822004697] [2021-01-06 11:06:02,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 11:06:02,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822004697] [2021-01-06 11:06:02,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814244346] [2021-01-06 11:06:02,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:02,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:06:02,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:02,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 11:06:02,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 11:06:02,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:02,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 11:06:02,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592344886] [2021-01-06 11:06:02,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 11:06:02,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:02,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 11:06:02,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 11:06:02,377 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2021-01-06 11:06:02,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:02,550 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2021-01-06 11:06:02,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 11:06:02,551 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2021-01-06 11:06:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:02,553 INFO L225 Difference]: With dead ends: 129 [2021-01-06 11:06:02,553 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 11:06:02,554 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 [2021-01-06 11:06:02,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 11:06:02,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 48. [2021-01-06 11:06:02,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 11:06:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-01-06 11:06:02,561 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 41 [2021-01-06 11:06:02,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:02,561 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-01-06 11:06:02,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 11:06:02,561 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-01-06 11:06:02,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 11:06:02,562 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:02,563 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:02,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 11:06:02,777 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:02,778 INFO L82 PathProgramCache]: Analyzing trace with hash -859403407, now seen corresponding path program 9 times [2021-01-06 11:06:02,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:02,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484753202] [2021-01-06 11:06:02,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 11:06:02,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484753202] [2021-01-06 11:06:02,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726605920] [2021-01-06 11:06:02,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:46,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 11:06:46,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:46,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 11:06:46,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 11:06:46,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:46,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 11:06:46,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847359575] [2021-01-06 11:06:46,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 11:06:46,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:46,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 11:06:46,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:06:46,889 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 13 states. [2021-01-06 11:06:47,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:47,049 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2021-01-06 11:06:47,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 11:06:47,050 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2021-01-06 11:06:47,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:47,052 INFO L225 Difference]: With dead ends: 141 [2021-01-06 11:06:47,052 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 11:06:47,052 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 [2021-01-06 11:06:47,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 11:06:47,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 52. [2021-01-06 11:06:47,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 11:06:47,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-01-06 11:06:47,058 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2021-01-06 11:06:47,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:47,058 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-01-06 11:06:47,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 11:06:47,059 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-01-06 11:06:47,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 11:06:47,060 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:47,060 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:47,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:47,261 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:47,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:47,263 INFO L82 PathProgramCache]: Analyzing trace with hash 407457837, now seen corresponding path program 10 times [2021-01-06 11:06:47,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:47,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587974193] [2021-01-06 11:06:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 11:06:47,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587974193] [2021-01-06 11:06:47,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49079418] [2021-01-06 11:06:47,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:47,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:06:47,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:47,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 11:06:47,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 11:06:47,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:47,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 11:06:47,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653343406] [2021-01-06 11:06:47,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 11:06:47,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:47,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 11:06:47,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:06:47,608 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 14 states. [2021-01-06 11:06:47,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:47,794 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2021-01-06 11:06:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 11:06:47,797 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2021-01-06 11:06:47,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:47,798 INFO L225 Difference]: With dead ends: 153 [2021-01-06 11:06:47,798 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 11:06:47,799 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 [2021-01-06 11:06:47,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 11:06:47,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 56. [2021-01-06 11:06:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 11:06:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-01-06 11:06:47,805 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2021-01-06 11:06:47,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:47,805 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-01-06 11:06:47,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 11:06:47,805 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-01-06 11:06:47,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 11:06:47,806 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:47,806 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:48,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:48,018 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:48,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:48,019 INFO L82 PathProgramCache]: Analyzing trace with hash -380877079, now seen corresponding path program 11 times [2021-01-06 11:06:48,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:48,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345331530] [2021-01-06 11:06:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 11:06:48,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345331530] [2021-01-06 11:06:48,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555223991] [2021-01-06 11:06:48,193 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