/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-industry-pattern/array_of_struct_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:17:04,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:17:04,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:17:04,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-23 00:17:04,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:17:04,885 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:17:04,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:17:04,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:17:04,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:17:04,893 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:17:04,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:17:04,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:17:04,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:17:04,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:17:04,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:17:04,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:17:04,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:17:04,896 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:17:04,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:17:04,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:17:04,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:17:04,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:17:04,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:17:04,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:17:04,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:17:04,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:17:04,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:17:04,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:17:04,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:17:04,900 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:17:04,900 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:17:05,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:17:05,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:17:05,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:17:05,449 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:17:05,450 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:17:05,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_single_elem_init.i [2020-12-23 00:17:05,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a7a81039f/b9393d421f0e4af585cef1772ba8d64f/FLAG80e38a32f [2020-12-23 00:17:06,143 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:17:06,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_single_elem_init.i [2020-12-23 00:17:06,151 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a7a81039f/b9393d421f0e4af585cef1772ba8d64f/FLAG80e38a32f [2020-12-23 00:17:06,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a7a81039f/b9393d421f0e4af585cef1772ba8d64f [2020-12-23 00:17:06,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:17:06,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:17:06,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:17:06,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:17:06,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:17:06,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:17:06" (1/1) ... [2020-12-23 00:17:06,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce36a19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:06, skipping insertion in model container [2020-12-23 00:17:06,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:17:06" (1/1) ... [2020-12-23 00:17:06,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:17:06,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:17:06,684 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-industry-pattern/array_of_struct_single_elem_init.i[865,878] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~s~0,],n] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~s~0,],p] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~s~0,],p] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~a~0,GLOBAL],[IntegerLiteral[3]]],p] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~a~0,GLOBAL],[IntegerLiteral[3]]],n] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:17:06,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:17:08,534 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:17:08,549 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_single_elem_init.i[865,878] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#s~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#s~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#s~0,],base],StructAccessExpression[IdentifierExpression[~#s~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#s~0,],base],StructAccessExpression[IdentifierExpression[~#s~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[24],StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[28],StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:17:08,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:17:08,579 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:17:08,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:08 WrapperNode [2020-12-23 00:17:08,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:17:08,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:17:08,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:17:08,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:17:08,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:08" (1/1) ... [2020-12-23 00:17:08,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:08" (1/1) ... [2020-12-23 00:17:08,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:17:08,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:17:08,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:17:08,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:17:08,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:08" (1/1) ... [2020-12-23 00:17:08,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:08" (1/1) ... [2020-12-23 00:17:08,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:08" (1/1) ... [2020-12-23 00:17:08,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:08" (1/1) ... [2020-12-23 00:17:08,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:08" (1/1) ... [2020-12-23 00:17:08,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:08" (1/1) ... [2020-12-23 00:17:08,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:08" (1/1) ... [2020-12-23 00:17:08,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:17:08,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:17:08,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:17:08,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:17:08,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:17:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:17:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:17:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:17:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:17:08,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:17:08,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:17:08,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:17:09,128 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:17:09,128 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 00:17:09,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:17:09 BoogieIcfgContainer [2020-12-23 00:17:09,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:17:09,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:17:09,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:17:09,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:17:09,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:17:06" (1/3) ... [2020-12-23 00:17:09,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3faba1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:17:09, skipping insertion in model container [2020-12-23 00:17:09,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:08" (2/3) ... [2020-12-23 00:17:09,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3faba1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:17:09, skipping insertion in model container [2020-12-23 00:17:09,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:17:09" (3/3) ... [2020-12-23 00:17:09,139 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_single_elem_init.i [2020-12-23 00:17:09,145 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:17:09,151 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:17:09,171 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:17:09,197 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:17:09,197 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:17:09,197 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:17:09,197 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:17:09,198 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:17:09,198 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:17:09,198 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:17:09,198 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:17:09,213 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-23 00:17:09,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:17:09,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:09,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:09,220 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:09,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:09,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1140000322, now seen corresponding path program 1 times [2020-12-23 00:17:09,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:09,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422060699] [2020-12-23 00:17:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:09,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422060699] [2020-12-23 00:17:09,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:17:09,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:17:09,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522862536] [2020-12-23 00:17:09,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:17:09,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:09,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:17:09,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:17:09,414 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-23 00:17:09,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:09,431 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2020-12-23 00:17:09,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:17:09,433 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-23 00:17:09,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:09,442 INFO L225 Difference]: With dead ends: 32 [2020-12-23 00:17:09,442 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 00:17:09,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:17:09,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 00:17:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 00:17:09,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 00:17:09,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2020-12-23 00:17:09,537 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 9 [2020-12-23 00:17:09,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:09,538 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2020-12-23 00:17:09,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:17:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2020-12-23 00:17:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:17:09,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:09,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:09,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:17:09,540 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:09,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:09,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1807612939, now seen corresponding path program 1 times [2020-12-23 00:17:09,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:09,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034869441] [2020-12-23 00:17:09,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:09,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034869441] [2020-12-23 00:17:09,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:17:09,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:17:09,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815754231] [2020-12-23 00:17:09,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:17:09,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:09,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:17:09,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:17:09,607 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 3 states. [2020-12-23 00:17:09,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:09,652 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2020-12-23 00:17:09,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:17:09,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 00:17:09,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:09,654 INFO L225 Difference]: With dead ends: 36 [2020-12-23 00:17:09,654 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 00:17:09,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:17:09,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 00:17:09,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2020-12-23 00:17:09,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 00:17:09,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2020-12-23 00:17:09,661 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2020-12-23 00:17:09,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:09,661 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-12-23 00:17:09,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:17:09,661 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2020-12-23 00:17:09,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:17:09,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:09,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:09,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:17:09,663 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:09,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:09,664 INFO L82 PathProgramCache]: Analyzing trace with hash -2006795472, now seen corresponding path program 1 times [2020-12-23 00:17:09,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:09,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166450207] [2020-12-23 00:17:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:09,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166450207] [2020-12-23 00:17:09,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889644857] [2020-12-23 00:17:09,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:09,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:17:09,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:09,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:09,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:17:09,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457873888] [2020-12-23 00:17:09,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:17:09,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:09,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:17:09,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:17:09,962 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 5 states. [2020-12-23 00:17:10,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:10,024 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-12-23 00:17:10,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:17:10,025 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-23 00:17:10,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:10,026 INFO L225 Difference]: With dead ends: 48 [2020-12-23 00:17:10,026 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 00:17:10,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:17:10,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 00:17:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2020-12-23 00:17:10,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 00:17:10,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2020-12-23 00:17:10,032 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 13 [2020-12-23 00:17:10,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:10,033 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2020-12-23 00:17:10,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:17:10,033 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2020-12-23 00:17:10,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:17:10,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:10,034 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:10,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:17:10,249 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:10,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:10,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2104533781, now seen corresponding path program 2 times [2020-12-23 00:17:10,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:10,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101997302] [2020-12-23 00:17:10,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:10,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101997302] [2020-12-23 00:17:10,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055309064] [2020-12-23 00:17:10,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:10,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:10,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:10,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:17:10,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:10,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:10,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 00:17:10,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909017192] [2020-12-23 00:17:10,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:17:10,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:10,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:17:10,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:17:10,552 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 6 states. [2020-12-23 00:17:10,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:10,644 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2020-12-23 00:17:10,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:17:10,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-23 00:17:10,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:10,647 INFO L225 Difference]: With dead ends: 60 [2020-12-23 00:17:10,647 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 00:17:10,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:17:10,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 00:17:10,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 24. [2020-12-23 00:17:10,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 00:17:10,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-12-23 00:17:10,654 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 17 [2020-12-23 00:17:10,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:10,654 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-12-23 00:17:10,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:17:10,655 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2020-12-23 00:17:10,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:17:10,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:10,656 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:10,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:10,872 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:10,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:10,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1842260262, now seen corresponding path program 3 times [2020-12-23 00:17:10,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:10,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236775333] [2020-12-23 00:17:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:10,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236775333] [2020-12-23 00:17:10,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022496303] [2020-12-23 00:17:10,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:11,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:17:11,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:11,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:17:11,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:11,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:11,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:17:11,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523045744] [2020-12-23 00:17:11,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:17:11,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:11,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:17:11,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:17:11,215 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 7 states. [2020-12-23 00:17:11,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:11,308 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2020-12-23 00:17:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:17:11,309 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-12-23 00:17:11,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:11,310 INFO L225 Difference]: With dead ends: 72 [2020-12-23 00:17:11,310 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 00:17:11,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:17:11,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 00:17:11,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 28. [2020-12-23 00:17:11,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 00:17:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-12-23 00:17:11,317 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 21 [2020-12-23 00:17:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:11,318 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-12-23 00:17:11,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:17:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-12-23 00:17:11,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 00:17:11,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:11,319 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:11,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:11,534 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:11,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:11,536 INFO L82 PathProgramCache]: Analyzing trace with hash -741908511, now seen corresponding path program 4 times [2020-12-23 00:17:11,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:11,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933101884] [2020-12-23 00:17:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:11,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933101884] [2020-12-23 00:17:11,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178202691] [2020-12-23 00:17:11,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:11,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:17:11,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:11,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:17:11,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:11,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:11,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 00:17:11,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506467547] [2020-12-23 00:17:11,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:17:11,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:11,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:17:11,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:17:11,977 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 8 states. [2020-12-23 00:17:12,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:12,083 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2020-12-23 00:17:12,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:17:12,084 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-12-23 00:17:12,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:12,085 INFO L225 Difference]: With dead ends: 84 [2020-12-23 00:17:12,085 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 00:17:12,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:17:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 00:17:12,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 32. [2020-12-23 00:17:12,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 00:17:12,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-12-23 00:17:12,091 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 25 [2020-12-23 00:17:12,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:12,092 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-12-23 00:17:12,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:17:12,092 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-12-23 00:17:12,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:17:12,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:12,093 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:12,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:12,308 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:12,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:12,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1933557476, now seen corresponding path program 5 times [2020-12-23 00:17:12,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:12,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162443367] [2020-12-23 00:17:12,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:12,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162443367] [2020-12-23 00:17:12,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467191808] [2020-12-23 00:17:12,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:13,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 00:17:13,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:13,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:17:13,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:13,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:13,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 00:17:13,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9106221] [2020-12-23 00:17:13,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:17:13,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:13,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:17:13,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:17:13,138 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 9 states. [2020-12-23 00:17:13,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:13,263 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2020-12-23 00:17:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:17:13,264 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-23 00:17:13,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:13,266 INFO L225 Difference]: With dead ends: 96 [2020-12-23 00:17:13,267 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 00:17:13,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:17:13,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 00:17:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 36. [2020-12-23 00:17:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 00:17:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-12-23 00:17:13,278 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 29 [2020-12-23 00:17:13,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:13,278 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-12-23 00:17:13,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:17:13,278 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-12-23 00:17:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 00:17:13,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:13,279 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:13,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 00:17:13,495 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:13,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:13,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1872760023, now seen corresponding path program 6 times [2020-12-23 00:17:13,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:13,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522767754] [2020-12-23 00:17:13,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:13,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522767754] [2020-12-23 00:17:13,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410948777] [2020-12-23 00:17:13,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:14,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:17:14,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:14,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:17:14,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:14,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:14,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:17:14,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126088435] [2020-12-23 00:17:14,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:17:14,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:14,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:17:14,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:17:14,434 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 10 states. [2020-12-23 00:17:14,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:14,520 INFO L93 Difference]: Finished difference Result 108 states and 136 transitions. [2020-12-23 00:17:14,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:17:14,521 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-12-23 00:17:14,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:14,522 INFO L225 Difference]: With dead ends: 108 [2020-12-23 00:17:14,522 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 00:17:14,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:17:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 00:17:14,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 40. [2020-12-23 00:17:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 00:17:14,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-12-23 00:17:14,528 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 33 [2020-12-23 00:17:14,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:14,528 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-12-23 00:17:14,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:17:14,528 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-12-23 00:17:14,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 00:17:14,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:14,529 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:14,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:14,743 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:14,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:14,744 INFO L82 PathProgramCache]: Analyzing trace with hash 32342802, now seen corresponding path program 7 times [2020-12-23 00:17:14,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:14,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255080605] [2020-12-23 00:17:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:14,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255080605] [2020-12-23 00:17:14,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634451536] [2020-12-23 00:17:14,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:15,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:17:15,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:15,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:15,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:17:15,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691713723] [2020-12-23 00:17:15,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:17:15,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:15,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:17:15,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:17:15,205 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 11 states. [2020-12-23 00:17:15,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:15,302 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2020-12-23 00:17:15,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:17:15,302 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-12-23 00:17:15,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:15,303 INFO L225 Difference]: With dead ends: 120 [2020-12-23 00:17:15,303 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 00:17:15,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:17:15,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 00:17:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 44. [2020-12-23 00:17:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 00:17:15,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-12-23 00:17:15,309 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 37 [2020-12-23 00:17:15,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:15,309 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-12-23 00:17:15,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:17:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2020-12-23 00:17:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 00:17:15,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:15,311 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:15,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:15,525 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:15,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:15,526 INFO L82 PathProgramCache]: Analyzing trace with hash 667902925, now seen corresponding path program 8 times [2020-12-23 00:17:15,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:15,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231341889] [2020-12-23 00:17:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:15,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231341889] [2020-12-23 00:17:15,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185951898] [2020-12-23 00:17:15,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:15,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:15,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:15,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:17:15,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:15,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:15,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:17:15,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440760498] [2020-12-23 00:17:15,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:17:15,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:15,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:17:15,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:17:15,884 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 12 states. [2020-12-23 00:17:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:15,999 INFO L93 Difference]: Finished difference Result 132 states and 166 transitions. [2020-12-23 00:17:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:17:16,000 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-12-23 00:17:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:16,001 INFO L225 Difference]: With dead ends: 132 [2020-12-23 00:17:16,001 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 00:17:16,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:17:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 00:17:16,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 48. [2020-12-23 00:17:16,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:17:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2020-12-23 00:17:16,007 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 41 [2020-12-23 00:17:16,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:16,007 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2020-12-23 00:17:16,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:17:16,007 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2020-12-23 00:17:16,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:17:16,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:16,009 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:16,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:17:16,224 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:16,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:16,225 INFO L82 PathProgramCache]: Analyzing trace with hash -737382648, now seen corresponding path program 9 times [2020-12-23 00:17:16,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:16,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534324622] [2020-12-23 00:17:16,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:16,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534324622] [2020-12-23 00:17:16,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541524753] [2020-12-23 00:17:16,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:22,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 00:17:22,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:22,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:17:22,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:22,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:22,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:17:22,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406010543] [2020-12-23 00:17:22,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:17:22,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:22,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:17:22,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:17:22,619 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 13 states. [2020-12-23 00:17:22,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:22,741 INFO L93 Difference]: Finished difference Result 144 states and 181 transitions. [2020-12-23 00:17:22,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:17:22,742 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-12-23 00:17:22,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:22,743 INFO L225 Difference]: With dead ends: 144 [2020-12-23 00:17:22,743 INFO L226 Difference]: Without dead ends: 135 [2020-12-23 00:17:22,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:17:22,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-23 00:17:22,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 52. [2020-12-23 00:17:22,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 00:17:22,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2020-12-23 00:17:22,750 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 45 [2020-12-23 00:17:22,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:22,750 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2020-12-23 00:17:22,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:17:22,750 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2020-12-23 00:17:22,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 00:17:22,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:22,751 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:22,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:22,953 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:22,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:22,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1207212861, now seen corresponding path program 10 times [2020-12-23 00:17:22,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:22,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70737506] [2020-12-23 00:17:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:23,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70737506] [2020-12-23 00:17:23,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131412150] [2020-12-23 00:17:23,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:25,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:17:25,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:25,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:17:25,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:25,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:25,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:17:25,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786426166] [2020-12-23 00:17:25,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:17:25,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:25,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:17:25,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:17:25,261 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 14 states. [2020-12-23 00:17:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:25,394 INFO L93 Difference]: Finished difference Result 156 states and 196 transitions. [2020-12-23 00:17:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:17:25,394 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-12-23 00:17:25,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:25,396 INFO L225 Difference]: With dead ends: 156 [2020-12-23 00:17:25,396 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 00:17:25,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:17:25,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 00:17:25,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 56. [2020-12-23 00:17:25,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 00:17:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-12-23 00:17:25,402 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 49 [2020-12-23 00:17:25,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:25,402 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-12-23 00:17:25,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:17:25,402 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-12-23 00:17:25,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 00:17:25,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:25,403 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:25,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:25,617 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:25,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:25,619 INFO L82 PathProgramCache]: Analyzing trace with hash -204274434, now seen corresponding path program 11 times [2020-12-23 00:17:25,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:25,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749825917] [2020-12-23 00:17:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:25,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749825917] [2020-12-23 00:17:25,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610629100] [2020-12-23 00:17:25,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true