/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-examples/standard_copy1_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:42:08,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:42:08,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:42:08,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:42:08,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:42:08,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:42:08,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:42:08,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:42:08,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:42:08,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:42:08,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:42:08,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:42:08,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:42:08,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:42:08,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:42:08,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:42:08,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:42:08,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:42:08,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:42:08,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:42:08,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:42:08,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:42:08,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:42:08,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:42:08,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:42:08,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:42:08,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:42:08,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:42:08,303 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 09:42:08,351 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:42:08,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:42:08,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:42:08,356 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:42:08,356 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:42:08,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:42:08,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:42:08,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:42:08,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:42:08,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:42:08,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:42:08,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:42:08,359 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:42:08,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:42:08,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:42:08,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:42:08,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:42:08,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:42:08,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:42:08,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:42:08,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:42:08,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:42:08,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:42:08,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:42:08,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:42:08,362 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:42:08,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:42:08,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:42:08,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:42:08,881 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:42:08,882 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:42:08,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy1_ground-1.i [2021-01-06 09:42:08,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/692b433f2/caf7151fd5254c41a4b77a07ece69335/FLAGaec7c8e1c [2021-01-06 09:42:09,571 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:42:09,572 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy1_ground-1.i [2021-01-06 09:42:09,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/692b433f2/caf7151fd5254c41a4b77a07ece69335/FLAGaec7c8e1c [2021-01-06 09:42:09,947 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/692b433f2/caf7151fd5254c41a4b77a07ece69335 [2021-01-06 09:42:09,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:42:09,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:42:09,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:42:09,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:42:09,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:42:09,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:42:09" (1/1) ... [2021-01-06 09:42:09,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60d1d131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:09, skipping insertion in model container [2021-01-06 09:42:09,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:42:09" (1/1) ... [2021-01-06 09:42:09,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:42:09,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:42:10,229 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-examples/standard_copy1_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:42:10,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:42:10,271 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:42:10,284 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-examples/standard_copy1_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:42:10,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:42:10,310 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:42:10,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:10 WrapperNode [2021-01-06 09:42:10,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:42:10,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:42:10,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:42:10,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:42:10,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:10" (1/1) ... [2021-01-06 09:42:10,329 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:10" (1/1) ... [2021-01-06 09:42:10,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:42:10,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:42:10,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:42:10,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:42:10,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:10" (1/1) ... [2021-01-06 09:42:10,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:10" (1/1) ... [2021-01-06 09:42:10,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:10" (1/1) ... [2021-01-06 09:42:10,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:10" (1/1) ... [2021-01-06 09:42:10,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:10" (1/1) ... [2021-01-06 09:42:10,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:10" (1/1) ... [2021-01-06 09:42:10,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:10" (1/1) ... [2021-01-06 09:42:10,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:42:10,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:42:10,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:42:10,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:42:10,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:10" (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 09:42:10,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:42:10,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:42:10,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:42:10,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:42:10,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:42:10,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:42:10,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:42:10,728 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:42:10,728 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 09:42:10,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:42:10 BoogieIcfgContainer [2021-01-06 09:42:10,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:42:10,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:42:10,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:42:10,736 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:42:10,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:42:09" (1/3) ... [2021-01-06 09:42:10,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52417665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:42:10, skipping insertion in model container [2021-01-06 09:42:10,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:10" (2/3) ... [2021-01-06 09:42:10,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52417665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:42:10, skipping insertion in model container [2021-01-06 09:42:10,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:42:10" (3/3) ... [2021-01-06 09:42:10,740 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-1.i [2021-01-06 09:42:10,747 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:42:10,752 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:42:10,772 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:42:10,840 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:42:10,855 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:42:10,856 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:42:10,856 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:42:10,856 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:42:10,857 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:42:10,857 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:42:10,857 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:42:10,873 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-01-06 09:42:10,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 09:42:10,878 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:10,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:10,879 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:10,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:10,884 INFO L82 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2021-01-06 09:42:10,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:10,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135339734] [2021-01-06 09:42:10,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:11,093 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 09:42:11,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135339734] [2021-01-06 09:42:11,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:42:11,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:42:11,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882187977] [2021-01-06 09:42:11,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:42:11,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:11,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:42:11,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:42:11,122 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2021-01-06 09:42:11,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:11,159 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-01-06 09:42:11,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:42:11,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 09:42:11,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:11,173 INFO L225 Difference]: With dead ends: 34 [2021-01-06 09:42:11,174 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 09:42:11,177 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 09:42:11,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 09:42:11,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-01-06 09:42:11,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 09:42:11,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-01-06 09:42:11,225 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-01-06 09:42:11,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:11,226 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-01-06 09:42:11,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:42:11,226 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-01-06 09:42:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 09:42:11,227 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:11,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:11,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:42:11,228 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:11,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:11,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1564645395, now seen corresponding path program 1 times [2021-01-06 09:42:11,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:11,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803433831] [2021-01-06 09:42:11,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:42:11,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803433831] [2021-01-06 09:42:11,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100006718] [2021-01-06 09:42:11,347 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 09:42:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:11,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 09:42:11,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:42:11,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:42:11,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 09:42:11,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856163967] [2021-01-06 09:42:11,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:42:11,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:11,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:42:11,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:11,454 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2021-01-06 09:42:11,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:11,471 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-01-06 09:42:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:42:11,472 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-01-06 09:42:11,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:11,473 INFO L225 Difference]: With dead ends: 24 [2021-01-06 09:42:11,473 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 09:42:11,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:11,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 09:42:11,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-01-06 09:42:11,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 09:42:11,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-01-06 09:42:11,479 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2021-01-06 09:42:11,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:11,479 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-01-06 09:42:11,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:42:11,479 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-01-06 09:42:11,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 09:42:11,480 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:11,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:11,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:42:11,695 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:11,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:11,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2021-01-06 09:42:11,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:11,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770541937] [2021-01-06 09:42:11,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:11,744 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 09:42:11,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770541937] [2021-01-06 09:42:11,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093175392] [2021-01-06 09:42:11,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:11,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:42:11,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:11,854 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 09:42:11,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:11,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:42:11,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203640767] [2021-01-06 09:42:11,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:42:11,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:11,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:42:11,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:11,858 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2021-01-06 09:42:11,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:11,882 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-01-06 09:42:11,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:42:11,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-01-06 09:42:11,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:11,884 INFO L225 Difference]: With dead ends: 30 [2021-01-06 09:42:11,884 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 09:42:11,884 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 09:42:11,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 09:42:11,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-01-06 09:42:11,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 09:42:11,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-01-06 09:42:11,889 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2021-01-06 09:42:11,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:11,890 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-01-06 09:42:11,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:42:11,890 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-01-06 09:42:11,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 09:42:11,891 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:11,891 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:12,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:12,108 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:12,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:12,110 INFO L82 PathProgramCache]: Analyzing trace with hash -628241457, now seen corresponding path program 2 times [2021-01-06 09:42:12,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:12,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035097213] [2021-01-06 09:42:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 09:42:12,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035097213] [2021-01-06 09:42:12,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478609645] [2021-01-06 09:42:12,168 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 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 09:42:12,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:12,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:12,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:42:12,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:42:12,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:12,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 09:42:12,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392389544] [2021-01-06 09:42:12,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:42:12,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:12,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:42:12,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:42:12,287 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 7 states. [2021-01-06 09:42:12,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:12,338 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-01-06 09:42:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:42:12,339 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2021-01-06 09:42:12,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:12,340 INFO L225 Difference]: With dead ends: 35 [2021-01-06 09:42:12,340 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 09:42:12,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:42:12,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 09:42:12,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-01-06 09:42:12,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 09:42:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-01-06 09:42:12,346 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2021-01-06 09:42:12,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:12,346 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-01-06 09:42:12,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:42:12,347 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-01-06 09:42:12,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 09:42:12,347 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:12,348 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:12,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:12,563 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:12,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:12,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1927655819, now seen corresponding path program 3 times [2021-01-06 09:42:12,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:12,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950737116] [2021-01-06 09:42:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 09:42:12,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950737116] [2021-01-06 09:42:12,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151174855] [2021-01-06 09:42:12,647 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 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 09:42:12,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:42:12,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:12,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:42:12,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 09:42:12,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:12,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-01-06 09:42:12,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934371813] [2021-01-06 09:42:12,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:42:12,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:12,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:42:12,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:42:12,793 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 9 states. [2021-01-06 09:42:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:12,888 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-01-06 09:42:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:42:12,889 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2021-01-06 09:42:12,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:12,893 INFO L225 Difference]: With dead ends: 41 [2021-01-06 09:42:12,894 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 09:42:12,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:42:12,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 09:42:12,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-01-06 09:42:12,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 09:42:12,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-01-06 09:42:12,912 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2021-01-06 09:42:12,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:12,912 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-01-06 09:42:12,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:42:12,912 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-01-06 09:42:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 09:42:12,913 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:12,914 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:13,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:13,130 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:13,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:13,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1088075449, now seen corresponding path program 4 times [2021-01-06 09:42:13,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:13,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506725760] [2021-01-06 09:42:13,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 09:42:13,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506725760] [2021-01-06 09:42:13,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990175254] [2021-01-06 09:42:13,214 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 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 09:42:13,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:13,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:13,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:42:13,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 09:42:13,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:13,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-01-06 09:42:13,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234967660] [2021-01-06 09:42:13,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:42:13,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:13,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:42:13,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:42:13,348 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 11 states. [2021-01-06 09:42:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:13,404 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-01-06 09:42:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:42:13,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2021-01-06 09:42:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:13,405 INFO L225 Difference]: With dead ends: 47 [2021-01-06 09:42:13,405 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 09:42:13,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:42:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 09:42:13,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-01-06 09:42:13,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 09:42:13,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-01-06 09:42:13,411 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2021-01-06 09:42:13,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:13,412 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-01-06 09:42:13,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:42:13,412 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-01-06 09:42:13,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 09:42:13,413 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:13,413 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:13,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:42:13,627 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:13,628 INFO L82 PathProgramCache]: Analyzing trace with hash -509111549, now seen corresponding path program 5 times [2021-01-06 09:42:13,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:13,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833833189] [2021-01-06 09:42:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 09:42:13,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833833189] [2021-01-06 09:42:13,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344574532] [2021-01-06 09:42:13,715 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 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 09:42:13,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 09:42:13,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:13,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:42:13,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 09:42:14,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:14,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-01-06 09:42:14,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644195212] [2021-01-06 09:42:14,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:42:14,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:14,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:42:14,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:42:14,006 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2021-01-06 09:42:14,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:14,072 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-01-06 09:42:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:42:14,072 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2021-01-06 09:42:14,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:14,073 INFO L225 Difference]: With dead ends: 53 [2021-01-06 09:42:14,073 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 09:42:14,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:42:14,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 09:42:14,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-01-06 09:42:14,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 09:42:14,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-01-06 09:42:14,079 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2021-01-06 09:42:14,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:14,080 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-01-06 09:42:14,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:42:14,080 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-01-06 09:42:14,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 09:42:14,081 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:14,081 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:14,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:14,297 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:14,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:14,298 INFO L82 PathProgramCache]: Analyzing trace with hash 105352895, now seen corresponding path program 6 times [2021-01-06 09:42:14,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:14,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073611984] [2021-01-06 09:42:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 09:42:14,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073611984] [2021-01-06 09:42:14,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813465391] [2021-01-06 09:42:14,389 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 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 09:42:14,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 09:42:14,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:14,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:42:14,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:42:14,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:14,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-01-06 09:42:14,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228202368] [2021-01-06 09:42:14,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:42:14,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:14,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:42:14,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:42:14,598 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 15 states. [2021-01-06 09:42:14,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:14,667 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-01-06 09:42:14,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 09:42:14,668 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2021-01-06 09:42:14,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:14,669 INFO L225 Difference]: With dead ends: 59 [2021-01-06 09:42:14,669 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 09:42:14,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:42:14,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 09:42:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-01-06 09:42:14,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 09:42:14,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-01-06 09:42:14,675 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2021-01-06 09:42:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:14,675 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-01-06 09:42:14,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:42:14,676 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-01-06 09:42:14,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 09:42:14,677 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:14,677 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:14,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:14,892 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:14,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:14,892 INFO L82 PathProgramCache]: Analyzing trace with hash -497009541, now seen corresponding path program 7 times [2021-01-06 09:42:14,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:14,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223489744] [2021-01-06 09:42:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:42:15,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223489744] [2021-01-06 09:42:15,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733430708] [2021-01-06 09:42:15,039 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 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 09:42:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:15,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:42:15,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:42:15,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:15,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:42:15,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516802472] [2021-01-06 09:42:15,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:42:15,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:15,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:42:15,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:42:15,209 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 11 states. [2021-01-06 09:42:15,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:15,259 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-01-06 09:42:15,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:42:15,260 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2021-01-06 09:42:15,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:15,261 INFO L225 Difference]: With dead ends: 62 [2021-01-06 09:42:15,261 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 09:42:15,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 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 09:42:15,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 09:42:15,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-01-06 09:42:15,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 09:42:15,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-01-06 09:42:15,266 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2021-01-06 09:42:15,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:15,267 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-01-06 09:42:15,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:42:15,267 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-01-06 09:42:15,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 09:42:15,268 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:15,268 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:15,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:42:15,483 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:15,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:15,484 INFO L82 PathProgramCache]: Analyzing trace with hash 531052601, now seen corresponding path program 8 times [2021-01-06 09:42:15,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:15,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139872978] [2021-01-06 09:42:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:42:15,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139872978] [2021-01-06 09:42:15,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533888759] [2021-01-06 09:42:15,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:42:15,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:15,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:15,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:42:15,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:42:15,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:15,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:42:15,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348932217] [2021-01-06 09:42:15,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:42:15,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:15,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:42:15,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:42:15,771 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 12 states. [2021-01-06 09:42:15,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:15,814 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2021-01-06 09:42:15,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:42:15,815 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2021-01-06 09:42:15,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:15,816 INFO L225 Difference]: With dead ends: 64 [2021-01-06 09:42:15,816 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 09:42:15,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 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 09:42:15,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 09:42:15,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-01-06 09:42:15,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 09:42:15,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-01-06 09:42:15,821 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2021-01-06 09:42:15,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:15,822 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-01-06 09:42:15,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:42:15,822 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-01-06 09:42:15,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 09:42:15,823 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:15,823 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:16,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:16,037 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:16,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:16,038 INFO L82 PathProgramCache]: Analyzing trace with hash 656292983, now seen corresponding path program 9 times [2021-01-06 09:42:16,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:16,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698655240] [2021-01-06 09:42:16,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:42:16,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698655240] [2021-01-06 09:42:16,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48681043] [2021-01-06 09:42:16,215 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 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 09:42:16,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 09:42:16,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:16,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:42:16,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 09:42:16,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:16,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-01-06 09:42:16,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039006305] [2021-01-06 09:42:16,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:42:16,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:16,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:42:16,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:42:16,526 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 19 states. [2021-01-06 09:42:16,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:16,617 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-01-06 09:42:16,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:42:16,618 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2021-01-06 09:42:16,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:16,619 INFO L225 Difference]: With dead ends: 69 [2021-01-06 09:42:16,619 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 09:42:16,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:42:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 09:42:16,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-01-06 09:42:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 09:42:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-01-06 09:42:16,625 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2021-01-06 09:42:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:16,626 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-01-06 09:42:16,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:42:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-01-06 09:42:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 09:42:16,627 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:16,627 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:16,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:16,841 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:16,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:16,842 INFO L82 PathProgramCache]: Analyzing trace with hash -363708877, now seen corresponding path program 10 times [2021-01-06 09:42:16,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:16,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111549366] [2021-01-06 09:42:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 09:42:17,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111549366] [2021-01-06 09:42:17,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731649845] [2021-01-06 09:42:17,006 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:17,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:17,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:17,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:42:17,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:42:17,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:17,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-01-06 09:42:17,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698786815] [2021-01-06 09:42:17,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 09:42:17,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:17,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 09:42:17,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:42:17,289 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 21 states. [2021-01-06 09:42:17,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:17,411 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2021-01-06 09:42:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 09:42:17,411 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2021-01-06 09:42:17,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:17,412 INFO L225 Difference]: With dead ends: 75 [2021-01-06 09:42:17,412 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 09:42:17,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:42:17,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 09:42:17,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-01-06 09:42:17,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 09:42:17,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-01-06 09:42:17,419 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2021-01-06 09:42:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:17,420 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-01-06 09:42:17,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 09:42:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-01-06 09:42:17,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 09:42:17,421 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:17,421 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:17,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:42:17,635 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:17,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:17,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1684803089, now seen corresponding path program 11 times [2021-01-06 09:42:17,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:17,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302824259] [2021-01-06 09:42:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 09:42:17,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302824259] [2021-01-06 09:42:17,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070685890] [2021-01-06 09:42:17,833 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:18,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 09:42:18,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:18,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:42:18,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 09:42:18,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:18,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 09:42:18,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441892457] [2021-01-06 09:42:18,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:42:18,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:18,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:42:18,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:42:18,519 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 15 states. [2021-01-06 09:42:18,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:18,574 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2021-01-06 09:42:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:42:18,575 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2021-01-06 09:42:18,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:18,575 INFO L225 Difference]: With dead ends: 78 [2021-01-06 09:42:18,576 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 09:42:18,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:42:18,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 09:42:18,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-01-06 09:42:18,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 09:42:18,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-01-06 09:42:18,582 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2021-01-06 09:42:18,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:18,583 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-01-06 09:42:18,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:42:18,583 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-01-06 09:42:18,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 09:42:18,584 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:18,584 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:18,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:42:18,799 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:18,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:18,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1669775187, now seen corresponding path program 12 times [2021-01-06 09:42:18,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:18,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275353816] [2021-01-06 09:42:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 09:42:19,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275353816] [2021-01-06 09:42:19,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153325312] [2021-01-06 09:42:19,009 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:19,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 09:42:19,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:19,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:42:19,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 09:42:20,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:20,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2021-01-06 09:42:20,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051667289] [2021-01-06 09:42:20,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 09:42:20,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:20,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 09:42:20,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:42:20,114 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 24 states. [2021-01-06 09:42:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:20,244 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2021-01-06 09:42:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 09:42:20,245 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2021-01-06 09:42:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:20,245 INFO L225 Difference]: With dead ends: 83 [2021-01-06 09:42:20,245 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 09:42:20,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:42:20,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 09:42:20,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-01-06 09:42:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 09:42:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-01-06 09:42:20,252 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2021-01-06 09:42:20,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:20,252 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-01-06 09:42:20,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 09:42:20,253 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-01-06 09:42:20,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 09:42:20,253 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:20,254 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:20,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:42:20,469 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:20,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:20,470 INFO L82 PathProgramCache]: Analyzing trace with hash 557979497, now seen corresponding path program 13 times [2021-01-06 09:42:20,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:20,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169861889] [2021-01-06 09:42:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 09:42:20,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169861889] [2021-01-06 09:42:20,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533756252] [2021-01-06 09:42:20,654 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:20,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:42:20,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 09:42:20,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:20,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:42:20,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602429815] [2021-01-06 09:42:20,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:42:20,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:20,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:42:20,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:42:20,808 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 17 states. [2021-01-06 09:42:20,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:20,884 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2021-01-06 09:42:20,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:42:20,884 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2021-01-06 09:42:20,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:20,885 INFO L225 Difference]: With dead ends: 86 [2021-01-06 09:42:20,885 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 09:42:20,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:42:20,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 09:42:20,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-01-06 09:42:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 09:42:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-01-06 09:42:20,892 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2021-01-06 09:42:20,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:20,892 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-01-06 09:42:20,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:42:20,892 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-01-06 09:42:20,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 09:42:20,893 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:20,893 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:21,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:21,108 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:21,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:21,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1957371993, now seen corresponding path program 14 times [2021-01-06 09:42:21,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:21,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921016699] [2021-01-06 09:42:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 09:42:21,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921016699] [2021-01-06 09:42:21,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578350969] [2021-01-06 09:42:21,350 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:21,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:21,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:21,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:42:21,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 09:42:21,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:21,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:42:21,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772605145] [2021-01-06 09:42:21,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:42:21,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:21,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:42:21,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:42:21,564 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 18 states. [2021-01-06 09:42:21,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:21,651 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-01-06 09:42:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:42:21,652 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2021-01-06 09:42:21,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:21,654 INFO L225 Difference]: With dead ends: 88 [2021-01-06 09:42:21,654 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 09:42:21,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:42:21,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 09:42:21,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-01-06 09:42:21,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 09:42:21,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-01-06 09:42:21,660 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2021-01-06 09:42:21,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:21,660 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-01-06 09:42:21,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:42:21,660 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-01-06 09:42:21,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 09:42:21,661 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:21,661 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:21,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 09:42:21,875 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:21,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:21,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1143566235, now seen corresponding path program 15 times [2021-01-06 09:42:21,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:21,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174784238] [2021-01-06 09:42:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 09:42:22,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174784238] [2021-01-06 09:42:22,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577546337] [2021-01-06 09:42:22,097 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:22,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 09:42:22,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:22,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:42:22,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 09:42:22,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:22,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-01-06 09:42:22,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466025533] [2021-01-06 09:42:22,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 09:42:22,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:22,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 09:42:22,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2021-01-06 09:42:22,709 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 28 states. [2021-01-06 09:42:22,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:22,854 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2021-01-06 09:42:22,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 09:42:22,858 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 57 [2021-01-06 09:42:22,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:22,859 INFO L225 Difference]: With dead ends: 93 [2021-01-06 09:42:22,859 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 09:42:22,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2021-01-06 09:42:22,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 09:42:22,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-01-06 09:42:22,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 09:42:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-01-06 09:42:22,870 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2021-01-06 09:42:22,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:22,871 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-01-06 09:42:22,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 09:42:22,872 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-01-06 09:42:22,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 09:42:22,874 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:22,875 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:23,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:42:23,092 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:23,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:23,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1160100641, now seen corresponding path program 16 times [2021-01-06 09:42:23,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:23,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037225899] [2021-01-06 09:42:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:42:23,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037225899] [2021-01-06 09:42:23,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535004391] [2021-01-06 09:42:23,354 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:23,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:23,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:23,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:42:23,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:42:23,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:23,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 09:42:23,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41976738] [2021-01-06 09:42:23,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:42:23,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:23,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:42:23,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:42:23,518 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 20 states. [2021-01-06 09:42:23,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:23,584 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2021-01-06 09:42:23,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:42:23,584 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 61 [2021-01-06 09:42:23,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:23,585 INFO L225 Difference]: With dead ends: 96 [2021-01-06 09:42:23,585 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 09:42:23,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:42:23,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 09:42:23,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-01-06 09:42:23,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 09:42:23,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-01-06 09:42:23,590 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 61 [2021-01-06 09:42:23,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:23,590 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-01-06 09:42:23,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:42:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-01-06 09:42:23,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 09:42:23,591 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:23,591 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:23,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 09:42:23,807 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:23,808 INFO L82 PathProgramCache]: Analyzing trace with hash -595368609, now seen corresponding path program 17 times [2021-01-06 09:42:23,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:23,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022257883] [2021-01-06 09:42:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:42:24,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022257883] [2021-01-06 09:42:24,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236472728] [2021-01-06 09:42:24,194 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:29,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 09:42:29,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:29,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 09:42:29,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:42:29,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:29,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 09:42:29,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717809597] [2021-01-06 09:42:29,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 09:42:29,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:29,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 09:42:29,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:42:29,188 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 21 states. [2021-01-06 09:42:29,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:29,269 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-01-06 09:42:29,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 09:42:29,270 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 63 [2021-01-06 09:42:29,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:29,271 INFO L225 Difference]: With dead ends: 98 [2021-01-06 09:42:29,271 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 09:42:29,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:42:29,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 09:42:29,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-01-06 09:42:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 09:42:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-01-06 09:42:29,277 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 63 [2021-01-06 09:42:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:29,277 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-01-06 09:42:29,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 09:42:29,277 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-01-06 09:42:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 09:42:29,278 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:29,278 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:29,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:29,479 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:29,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:29,480 INFO L82 PathProgramCache]: Analyzing trace with hash 320829469, now seen corresponding path program 18 times [2021-01-06 09:42:29,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:29,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828724071] [2021-01-06 09:42:29,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:42:29,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828724071] [2021-01-06 09:42:29,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917229480] [2021-01-06 09:42:29,787 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:32,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 09:42:32,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:32,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:42:32,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 09:42:32,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:32,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 32 [2021-01-06 09:42:32,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353387372] [2021-01-06 09:42:32,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 09:42:32,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:32,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 09:42:32,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2021-01-06 09:42:32,851 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 32 states. [2021-01-06 09:42:33,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:33,037 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2021-01-06 09:42:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 09:42:33,038 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 65 [2021-01-06 09:42:33,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:33,038 INFO L225 Difference]: With dead ends: 103 [2021-01-06 09:42:33,039 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 09:42:33,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2021-01-06 09:42:33,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 09:42:33,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-01-06 09:42:33,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 09:42:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-01-06 09:42:33,048 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2021-01-06 09:42:33,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:33,049 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-01-06 09:42:33,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 09:42:33,050 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-01-06 09:42:33,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 09:42:33,050 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:33,050 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:33,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:33,251 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:33,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:33,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1142098215, now seen corresponding path program 19 times [2021-01-06 09:42:33,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:33,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401890839] [2021-01-06 09:42:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 09:42:33,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401890839] [2021-01-06 09:42:33,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857525937] [2021-01-06 09:42:33,594 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:33,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 09:42:33,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 09:42:33,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:33,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 09:42:33,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790855000] [2021-01-06 09:42:33,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:42:33,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:33,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:42:33,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:42:33,762 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 23 states. [2021-01-06 09:42:33,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:33,844 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2021-01-06 09:42:33,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 09:42:33,845 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2021-01-06 09:42:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:33,846 INFO L225 Difference]: With dead ends: 106 [2021-01-06 09:42:33,846 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 09:42:33,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:42:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 09:42:33,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-01-06 09:42:33,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 09:42:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-01-06 09:42:33,850 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 69 [2021-01-06 09:42:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:33,850 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-01-06 09:42:33,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:42:33,851 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-01-06 09:42:33,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 09:42:33,851 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:33,852 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:34,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 09:42:34,062 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:34,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:34,063 INFO L82 PathProgramCache]: Analyzing trace with hash 9667351, now seen corresponding path program 20 times [2021-01-06 09:42:34,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:34,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872560256] [2021-01-06 09:42:34,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 09:42:34,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872560256] [2021-01-06 09:42:34,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114669423] [2021-01-06 09:42:34,397 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:34,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:34,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:34,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 09:42:34,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 09:42:34,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:34,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 09:42:34,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532742178] [2021-01-06 09:42:34,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 09:42:34,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:34,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 09:42:34,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:42:34,608 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 24 states. [2021-01-06 09:42:34,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:34,702 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2021-01-06 09:42:34,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 09:42:34,703 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2021-01-06 09:42:34,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:34,704 INFO L225 Difference]: With dead ends: 108 [2021-01-06 09:42:34,704 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 09:42:34,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:42:34,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 09:42:34,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2021-01-06 09:42:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 09:42:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2021-01-06 09:42:34,708 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2021-01-06 09:42:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:34,708 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2021-01-06 09:42:34,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 09:42:34,708 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2021-01-06 09:42:34,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 09:42:34,709 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:34,709 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:34,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 09:42:34,924 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:34,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:34,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1245186091, now seen corresponding path program 21 times [2021-01-06 09:42:34,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:34,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985992170] [2021-01-06 09:42:34,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 09:42:35,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985992170] [2021-01-06 09:42:35,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807738117] [2021-01-06 09:42:35,280 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:36,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 09:42:36,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:36,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:42:36,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 09:42:36,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:36,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14] total 36 [2021-01-06 09:42:36,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756988690] [2021-01-06 09:42:36,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 09:42:36,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:36,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 09:42:36,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 09:42:36,902 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 36 states. [2021-01-06 09:42:37,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:37,073 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-01-06 09:42:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 09:42:37,074 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 73 [2021-01-06 09:42:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:37,075 INFO L225 Difference]: With dead ends: 113 [2021-01-06 09:42:37,075 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 09:42:37,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 09:42:37,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 09:42:37,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-01-06 09:42:37,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 09:42:37,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-01-06 09:42:37,080 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2021-01-06 09:42:37,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:37,080 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-01-06 09:42:37,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 09:42:37,080 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-01-06 09:42:37,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 09:42:37,081 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:37,081 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:37,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:37,296 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:37,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:37,296 INFO L82 PathProgramCache]: Analyzing trace with hash 772524689, now seen corresponding path program 22 times [2021-01-06 09:42:37,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:37,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107861532] [2021-01-06 09:42:37,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 09:42:37,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107861532] [2021-01-06 09:42:37,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986786610] [2021-01-06 09:42:37,743 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:37,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:37,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:37,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:42:37,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 09:42:38,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:38,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 38 [2021-01-06 09:42:38,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420752883] [2021-01-06 09:42:38,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 09:42:38,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:38,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 09:42:38,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:42:38,246 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 38 states. [2021-01-06 09:42:38,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:38,425 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2021-01-06 09:42:38,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 09:42:38,425 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 77 [2021-01-06 09:42:38,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:38,426 INFO L225 Difference]: With dead ends: 119 [2021-01-06 09:42:38,426 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 09:42:38,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:42:38,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 09:42:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-01-06 09:42:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 09:42:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2021-01-06 09:42:38,430 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 77 [2021-01-06 09:42:38,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:38,431 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2021-01-06 09:42:38,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 09:42:38,431 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2021-01-06 09:42:38,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 09:42:38,432 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:38,432 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:38,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 09:42:38,646 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:38,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:38,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1969172659, now seen corresponding path program 23 times [2021-01-06 09:42:38,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:38,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139993580] [2021-01-06 09:42:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 09:42:39,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139993580] [2021-01-06 09:42:39,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779082812] [2021-01-06 09:42:39,076 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:43:25,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 09:43:25,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:43:25,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:43:25,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:43:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 09:43:25,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:43:25,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 40 [2021-01-06 09:43:25,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028639258] [2021-01-06 09:43:25,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 09:43:25,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:43:25,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 09:43:25,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 09:43:25,507 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 40 states. [2021-01-06 09:43:25,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:43:25,692 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2021-01-06 09:43:25,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 09:43:25,692 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 81 [2021-01-06 09:43:25,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:43:25,693 INFO L225 Difference]: With dead ends: 125 [2021-01-06 09:43:25,693 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 09:43:25,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 09:43:25,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 09:43:25,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2021-01-06 09:43:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 09:43:25,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-01-06 09:43:25,697 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 81 [2021-01-06 09:43:25,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:43:25,697 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-01-06 09:43:25,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 09:43:25,698 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-01-06 09:43:25,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-01-06 09:43:25,698 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:43:25,698 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:43:25,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:43:25,899 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:43:25,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:43:25,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1289615863, now seen corresponding path program 24 times [2021-01-06 09:43:25,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:43:25,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252474873] [2021-01-06 09:43:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:43:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:43:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:43:26,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252474873] [2021-01-06 09:43:26,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859289205] [2021-01-06 09:43:26,351 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:43:56,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 09:43:56,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:43:56,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 09:43:56,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:43:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:43:56,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:43:56,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 09:43:56,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779841663] [2021-01-06 09:43:56,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 09:43:56,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:43:56,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 09:43:56,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 09:43:56,303 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 28 states. [2021-01-06 09:43:56,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:43:56,404 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2021-01-06 09:43:56,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 09:43:56,405 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 85 [2021-01-06 09:43:56,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:43:56,406 INFO L225 Difference]: With dead ends: 128 [2021-01-06 09:43:56,406 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 09:43:56,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 09:43:56,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 09:43:56,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-01-06 09:43:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 09:43:56,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-01-06 09:43:56,410 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 85 [2021-01-06 09:43:56,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:43:56,410 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-01-06 09:43:56,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 09:43:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-01-06 09:43:56,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-06 09:43:56,411 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:43:56,411 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:43:56,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 09:43:56,612 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:43:56,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:43:56,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1515476551, now seen corresponding path program 25 times [2021-01-06 09:43:56,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:43:56,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360662861] [2021-01-06 09:43:56,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:43:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:43:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:43:57,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360662861] [2021-01-06 09:43:57,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630478020] [2021-01-06 09:43:57,072 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:43:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:43:57,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 09:43:57,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:43:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:43:57,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:43:57,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 09:43:57,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353388490] [2021-01-06 09:43:57,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 09:43:57,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:43:57,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 09:43:57,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:43:57,271 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 29 states. [2021-01-06 09:43:57,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:43:57,371 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2021-01-06 09:43:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 09:43:57,372 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 87 [2021-01-06 09:43:57,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:43:57,373 INFO L225 Difference]: With dead ends: 130 [2021-01-06 09:43:57,373 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 09:43:57,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:43:57,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 09:43:57,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-01-06 09:43:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 09:43:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2021-01-06 09:43:57,377 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 87 [2021-01-06 09:43:57,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:43:57,378 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2021-01-06 09:43:57,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 09:43:57,378 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2021-01-06 09:43:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 09:43:57,379 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:43:57,379 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:43:57,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 09:43:57,594 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:43:57,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:43:57,594 INFO L82 PathProgramCache]: Analyzing trace with hash -30175483, now seen corresponding path program 26 times [2021-01-06 09:43:57,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:43:57,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139152616] [2021-01-06 09:43:57,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:43:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:43:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:43:58,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139152616] [2021-01-06 09:43:58,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544122008] [2021-01-06 09:43:58,091 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:43:58,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:43:58,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:43:58,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 09:43:58,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:43:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:43:58,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:43:58,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 09:43:58,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813096103] [2021-01-06 09:43:58,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 09:43:58,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:43:58,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 09:43:58,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:43:58,301 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 30 states. [2021-01-06 09:43:58,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:43:58,413 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2021-01-06 09:43:58,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 09:43:58,413 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 89 [2021-01-06 09:43:58,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:43:58,414 INFO L225 Difference]: With dead ends: 132 [2021-01-06 09:43:58,414 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 09:43:58,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:43:58,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 09:43:58,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-01-06 09:43:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 09:43:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2021-01-06 09:43:58,418 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2021-01-06 09:43:58,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:43:58,419 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2021-01-06 09:43:58,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 09:43:58,419 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2021-01-06 09:43:58,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 09:43:58,420 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:43:58,420 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:43:58,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 09:43:58,634 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:43:58,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:43:58,635 INFO L82 PathProgramCache]: Analyzing trace with hash 656904259, now seen corresponding path program 27 times [2021-01-06 09:43:58,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:43:58,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943651654] [2021-01-06 09:43:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:43:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:43:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:43:59,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943651654] [2021-01-06 09:43:59,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125084346] [2021-01-06 09:43:59,221 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:44:02,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-01-06 09:44:02,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:44:02,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:44:02,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:44:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-01-06 09:44:02,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:44:02,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17] total 45 [2021-01-06 09:44:02,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339645287] [2021-01-06 09:44:02,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 09:44:02,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:44:02,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 09:44:02,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 09:44:02,721 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 45 states. [2021-01-06 09:44:02,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:44:02,943 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2021-01-06 09:44:02,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 09:44:02,944 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 91 [2021-01-06 09:44:02,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:44:02,945 INFO L225 Difference]: With dead ends: 137 [2021-01-06 09:44:02,945 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 09:44:02,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 09:44:02,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 09:44:02,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2021-01-06 09:44:02,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 09:44:02,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2021-01-06 09:44:02,950 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 91 [2021-01-06 09:44:02,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:44:02,950 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2021-01-06 09:44:02,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 09:44:02,951 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2021-01-06 09:44:02,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-01-06 09:44:02,951 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:44:02,951 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:44:03,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 09:44:03,165 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:44:03,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:44:03,166 INFO L82 PathProgramCache]: Analyzing trace with hash -32748545, now seen corresponding path program 28 times [2021-01-06 09:44:03,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:44:03,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726156862] [2021-01-06 09:44:03,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:44:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:44:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 09:44:03,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726156862] [2021-01-06 09:44:03,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851558754] [2021-01-06 09:44:03,803 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:44:03,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:44:03,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:44:03,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:44:03,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:44:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-01-06 09:44:04,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:44:04,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18] total 47 [2021-01-06 09:44:04,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332644309] [2021-01-06 09:44:04,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 09:44:04,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:44:04,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 09:44:04,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 09:44:04,442 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 47 states. [2021-01-06 09:44:04,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:44:04,709 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2021-01-06 09:44:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 09:44:04,710 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 95 [2021-01-06 09:44:04,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:44:04,710 INFO L225 Difference]: With dead ends: 143 [2021-01-06 09:44:04,711 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 09:44:04,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 09:44:04,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 09:44:04,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2021-01-06 09:44:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 09:44:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2021-01-06 09:44:04,716 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 95 [2021-01-06 09:44:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:44:04,716 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2021-01-06 09:44:04,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 09:44:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2021-01-06 09:44:04,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 09:44:04,717 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:44:04,717 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:44:04,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:44:04,918 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:44:04,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:44:04,919 INFO L82 PathProgramCache]: Analyzing trace with hash 808565179, now seen corresponding path program 29 times [2021-01-06 09:44:04,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:44:04,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17886458] [2021-01-06 09:44:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:44:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:44:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 09:44:05,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17886458] [2021-01-06 09:44:05,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423027120] [2021-01-06 09:44:05,571 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true