/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_ptr_single_elem_init-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:17:13,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:17:13,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:17:13,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:17:13,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:17:13,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:17:13,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:17:13,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:17:13,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:17:13,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:17:13,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:17:13,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-23 00:17:13,809 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 00:17:13,854 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:17:13,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:17:13,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:17:13,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:17:13,858 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:17:13,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:17:13,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:17:13,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:17:13,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:17:13,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:17:13,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:17:13,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:17:13,861 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:17:13,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:17:13,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:17:13,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:17:13,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:17:13,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:17:13,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:17:13,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:17:13,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:17:13,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:17:13,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:17:13,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:17:13,864 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:17:13,864 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:17:14,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:17:14,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:17:14,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:17:14,253 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:17:14,254 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:17:14,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-2.i [2020-12-23 00:17:14,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/60f3f5636/cf7d29070118453e9508383e2ca15e51/FLAGffe8aff2a [2020-12-23 00:17:14,982 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:17:14,983 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-2.i [2020-12-23 00:17:14,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/60f3f5636/cf7d29070118453e9508383e2ca15e51/FLAGffe8aff2a [2020-12-23 00:17:15,326 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/60f3f5636/cf7d29070118453e9508383e2ca15e51 [2020-12-23 00:17:15,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:17:15,339 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:17:15,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:17:15,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:17:15,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:17:15,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:17:15" (1/1) ... [2020-12-23 00:17:15,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e1ec834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:15, skipping insertion in model container [2020-12-23 00:17:15,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:17:15" (1/1) ... [2020-12-23 00:17:15,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:17:15,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:17:15,568 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_ptr_single_elem_init-2.i[821,834] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~c~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~c~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IntegerLiteral[15000]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:17:15,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:17:15,597 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:17:15,609 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_ptr_single_elem_init-2.i[821,834] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~c~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~c~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[60000],StructAccessExpression[IdentifierExpression[~#a~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:17:15,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:17:15,638 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:17:15,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:15 WrapperNode [2020-12-23 00:17:15,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:17:15,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:17:15,641 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:17:15,641 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:17:15,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:15" (1/1) ... [2020-12-23 00:17:15,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:15" (1/1) ... [2020-12-23 00:17:15,696 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:17:15,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:17:15,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:17:15,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:17:15,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:15" (1/1) ... [2020-12-23 00:17:15,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:15" (1/1) ... [2020-12-23 00:17:15,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:15" (1/1) ... [2020-12-23 00:17:15,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:15" (1/1) ... [2020-12-23 00:17:15,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:15" (1/1) ... [2020-12-23 00:17:15,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:15" (1/1) ... [2020-12-23 00:17:15,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:15" (1/1) ... [2020-12-23 00:17:15,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:17:15,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:17:15,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:17:15,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:17:15,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:15" (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 00:17:15,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:17:15,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:17:15,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:17:15,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:17:15,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:17:15,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:17:15,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:17:16,175 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:17:16,175 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 00:17:16,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:17:16 BoogieIcfgContainer [2020-12-23 00:17:16,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:17:16,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:17:16,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:17:16,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:17:16,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:17:15" (1/3) ... [2020-12-23 00:17:16,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce9d9f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:17:16, skipping insertion in model container [2020-12-23 00:17:16,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:17:15" (2/3) ... [2020-12-23 00:17:16,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce9d9f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:17:16, skipping insertion in model container [2020-12-23 00:17:16,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:17:16" (3/3) ... [2020-12-23 00:17:16,199 INFO L111 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-2.i [2020-12-23 00:17:16,216 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:17:16,229 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:17:16,269 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:17:16,314 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:17:16,315 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:17:16,315 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:17:16,315 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:17:16,315 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:17:16,315 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:17:16,315 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:17:16,315 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:17:16,334 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-23 00:17:16,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 00:17:16,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:16,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:16,342 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:16,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:16,349 INFO L82 PathProgramCache]: Analyzing trace with hash 916381450, now seen corresponding path program 1 times [2020-12-23 00:17:16,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:16,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022813341] [2020-12-23 00:17:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:16,567 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 00:17:16,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022813341] [2020-12-23 00:17:16,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:17:16,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:17:16,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145055733] [2020-12-23 00:17:16,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:17:16,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:16,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:17:16,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:17:16,602 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-23 00:17:16,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:16,622 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2020-12-23 00:17:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:17:16,624 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 00:17:16,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:16,642 INFO L225 Difference]: With dead ends: 32 [2020-12-23 00:17:16,642 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 00:17:16,646 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 00:17:16,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 00:17:16,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 00:17:16,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 00:17:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2020-12-23 00:17:16,690 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 8 [2020-12-23 00:17:16,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:16,690 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2020-12-23 00:17:16,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:17:16,690 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2020-12-23 00:17:16,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 00:17:16,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:16,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:16,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:17:16,693 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:16,696 INFO L82 PathProgramCache]: Analyzing trace with hash 229281826, now seen corresponding path program 1 times [2020-12-23 00:17:16,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:16,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247491894] [2020-12-23 00:17:16,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:16,812 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 00:17:16,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247491894] [2020-12-23 00:17:16,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:17:16,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:17:16,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525721155] [2020-12-23 00:17:16,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:17:16,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:16,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:17:16,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:17:16,818 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand 3 states. [2020-12-23 00:17:16,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:16,928 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2020-12-23 00:17:16,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:17:16,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-23 00:17:16,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:16,931 INFO L225 Difference]: With dead ends: 33 [2020-12-23 00:17:16,932 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 00:17:16,933 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 00:17:16,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 00:17:16,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2020-12-23 00:17:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 00:17:16,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-12-23 00:17:16,946 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 8 [2020-12-23 00:17:16,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:16,947 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-12-23 00:17:16,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:17:16,947 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-12-23 00:17:16,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 00:17:16,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:16,949 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:16,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:17:16,950 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:16,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:16,952 INFO L82 PathProgramCache]: Analyzing trace with hash -528137142, now seen corresponding path program 1 times [2020-12-23 00:17:16,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:16,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656988311] [2020-12-23 00:17:16,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:17:17,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656988311] [2020-12-23 00:17:17,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959627006] [2020-12-23 00:17:17,077 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 00:17:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:17,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:17:17,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:17:17,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:17,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:17:17,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452085578] [2020-12-23 00:17:17,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:17:17,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:17,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:17:17,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:17:17,230 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2020-12-23 00:17:17,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:17,310 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-12-23 00:17:17,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:17:17,311 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-23 00:17:17,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:17,312 INFO L225 Difference]: With dead ends: 44 [2020-12-23 00:17:17,312 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 00:17:17,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 00:17:17,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 00:17:17,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-12-23 00:17:17,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 00:17:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-12-23 00:17:17,319 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 16 [2020-12-23 00:17:17,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:17,319 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-12-23 00:17:17,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:17:17,320 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-12-23 00:17:17,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 00:17:17,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:17,321 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:17,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:17:17,535 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:17,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:17,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1069426978, now seen corresponding path program 2 times [2020-12-23 00:17:17,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:17,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132956300] [2020-12-23 00:17:17,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:17:17,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132956300] [2020-12-23 00:17:17,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068218325] [2020-12-23 00:17:17,670 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 00:17:17,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:17,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:17,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:17:17,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:17:17,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:17,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 00:17:17,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536226547] [2020-12-23 00:17:17,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:17:17,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:17,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:17:17,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:17:17,773 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 6 states. [2020-12-23 00:17:17,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:17,842 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-12-23 00:17:17,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:17:17,843 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-12-23 00:17:17,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:17,844 INFO L225 Difference]: With dead ends: 56 [2020-12-23 00:17:17,844 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 00:17:17,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 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 00:17:17,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 00:17:17,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-12-23 00:17:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 00:17:17,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-12-23 00:17:17,851 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 24 [2020-12-23 00:17:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:17,852 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-12-23 00:17:17,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:17:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-12-23 00:17:17,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:17:17,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:17,853 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:18,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:18,067 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:18,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:18,068 INFO L82 PathProgramCache]: Analyzing trace with hash 879812426, now seen corresponding path program 3 times [2020-12-23 00:17:18,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:18,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270704208] [2020-12-23 00:17:18,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 00:17:18,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270704208] [2020-12-23 00:17:18,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970291847] [2020-12-23 00:17:18,171 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 00:17:18,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:17:18,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:18,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:17:18,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:18,265 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 00:17:18,268 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:17:18,270 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:17:18,271 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:17:18,271 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2020-12-23 00:17:18,302 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:17:18,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:17:18,329 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2020-12-23 00:17:18,330 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:17:18,368 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:17:18,381 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2020-12-23 00:17:18,382 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:17:18,393 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2020-12-23 00:17:18,394 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-23 00:17:18,431 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:17:18,440 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 6 dim-0 vars, and 3 xjuncts. [2020-12-23 00:17:18,441 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:158, output treesize:107 [2020-12-23 00:17:18,526 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 00:17:18,918 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 10 [2020-12-23 00:17:18,921 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:17:18,983 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:17:18,995 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 12 [2020-12-23 00:17:18,997 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:17:19,044 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:17:19,053 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 16 [2020-12-23 00:17:19,055 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-23 00:17:19,090 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:17:19,099 INFO L547 ElimStorePlain]: Start of recursive call 1: 19 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:17:19,099 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 22 variables, input treesize:217, output treesize:3 [2020-12-23 00:17:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 00:17:19,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:19,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-23 00:17:19,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602756822] [2020-12-23 00:17:19,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:17:19,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:19,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:17:19,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:17:19,128 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 9 states. [2020-12-23 00:17:19,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:19,943 INFO L93 Difference]: Finished difference Result 102 states and 139 transitions. [2020-12-23 00:17:19,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:17:19,944 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-12-23 00:17:19,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:19,947 INFO L225 Difference]: With dead ends: 102 [2020-12-23 00:17:19,947 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 00:17:19,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:17:19,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 00:17:19,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2020-12-23 00:17:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 00:17:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-12-23 00:17:19,957 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 32 [2020-12-23 00:17:19,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:19,957 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-12-23 00:17:19,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:17:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-12-23 00:17:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 00:17:19,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:19,959 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:20,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:20,174 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:20,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:20,175 INFO L82 PathProgramCache]: Analyzing trace with hash -2046541918, now seen corresponding path program 1 times [2020-12-23 00:17:20,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:20,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571755330] [2020-12-23 00:17:20,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 00:17:20,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571755330] [2020-12-23 00:17:20,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798622015] [2020-12-23 00:17:20,266 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 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 00:17:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:20,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:17:20,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 00:17:20,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:20,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 00:17:20,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188382978] [2020-12-23 00:17:20,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:17:20,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:20,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:17:20,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:17:20,403 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 8 states. [2020-12-23 00:17:20,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:20,528 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2020-12-23 00:17:20,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:17:20,529 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-12-23 00:17:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:20,533 INFO L225 Difference]: With dead ends: 92 [2020-12-23 00:17:20,533 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 00:17:20,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 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 00:17:20,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 00:17:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2020-12-23 00:17:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 00:17:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2020-12-23 00:17:20,552 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 40 [2020-12-23 00:17:20,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:20,552 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2020-12-23 00:17:20,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:17:20,552 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2020-12-23 00:17:20,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 00:17:20,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:20,555 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:20,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:20,756 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:20,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:20,757 INFO L82 PathProgramCache]: Analyzing trace with hash 118526412, now seen corresponding path program 2 times [2020-12-23 00:17:20,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:20,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152166154] [2020-12-23 00:17:20,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 00:17:20,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152166154] [2020-12-23 00:17:20,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867123594] [2020-12-23 00:17:20,859 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 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 00:17:20,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:20,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:20,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:17:20,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 00:17:20,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:20,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 00:17:20,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099892729] [2020-12-23 00:17:20,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:17:20,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:20,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:17:20,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:17:20,991 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand 9 states. [2020-12-23 00:17:21,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:21,119 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2020-12-23 00:17:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:17:21,120 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-12-23 00:17:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:21,121 INFO L225 Difference]: With dead ends: 106 [2020-12-23 00:17:21,121 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 00:17:21,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 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 00:17:21,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 00:17:21,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2020-12-23 00:17:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 00:17:21,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2020-12-23 00:17:21,143 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 48 [2020-12-23 00:17:21,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:21,145 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2020-12-23 00:17:21,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:17:21,146 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2020-12-23 00:17:21,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 00:17:21,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:21,148 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:21,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 00:17:21,356 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:21,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1453858974, now seen corresponding path program 3 times [2020-12-23 00:17:21,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:21,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731983926] [2020-12-23 00:17:21,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:17:21,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731983926] [2020-12-23 00:17:21,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149316966] [2020-12-23 00:17:21,455 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 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 00:17:21,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 00:17:21,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:21,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:17:21,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-23 00:17:21,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:21,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:17:21,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484046378] [2020-12-23 00:17:21,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:17:21,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:21,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:17:21,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:17:21,629 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand 10 states. [2020-12-23 00:17:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:21,766 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2020-12-23 00:17:21,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:17:21,766 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-12-23 00:17:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:21,768 INFO L225 Difference]: With dead ends: 120 [2020-12-23 00:17:21,768 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 00:17:21,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 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 00:17:21,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 00:17:21,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-12-23 00:17:21,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 00:17:21,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2020-12-23 00:17:21,792 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 56 [2020-12-23 00:17:21,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:21,792 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2020-12-23 00:17:21,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:17:21,792 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2020-12-23 00:17:21,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 00:17:21,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:21,797 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:22,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:22,017 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:22,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:22,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1210542604, now seen corresponding path program 4 times [2020-12-23 00:17:22,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:22,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325434114] [2020-12-23 00:17:22,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 00:17:22,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325434114] [2020-12-23 00:17:22,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346464381] [2020-12-23 00:17:22,148 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 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 00:17:22,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:17:22,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:22,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:17:22,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 00:17:22,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:22,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:17:22,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637396751] [2020-12-23 00:17:22,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:17:22,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:22,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:17:22,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:17:22,303 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand 11 states. [2020-12-23 00:17:22,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:22,503 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2020-12-23 00:17:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:17:22,503 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2020-12-23 00:17:22,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:22,504 INFO L225 Difference]: With dead ends: 134 [2020-12-23 00:17:22,504 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 00:17:22,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 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 00:17:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 00:17:22,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 98. [2020-12-23 00:17:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 00:17:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions. [2020-12-23 00:17:22,519 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 64 [2020-12-23 00:17:22,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:22,520 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 124 transitions. [2020-12-23 00:17:22,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:17:22,520 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions. [2020-12-23 00:17:22,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 00:17:22,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:22,523 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:22,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:22,738 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:22,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:22,739 INFO L82 PathProgramCache]: Analyzing trace with hash 250261282, now seen corresponding path program 5 times [2020-12-23 00:17:22,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:22,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005090665] [2020-12-23 00:17:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:17:22,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005090665] [2020-12-23 00:17:22,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462170183] [2020-12-23 00:17:22,865 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 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 00:17:22,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-23 00:17:22,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:22,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:17:22,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-12-23 00:17:23,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:23,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:17:23,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48486324] [2020-12-23 00:17:23,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:17:23,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:23,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:17:23,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:17:23,078 INFO L87 Difference]: Start difference. First operand 98 states and 124 transitions. Second operand 12 states. [2020-12-23 00:17:23,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:23,238 INFO L93 Difference]: Finished difference Result 148 states and 183 transitions. [2020-12-23 00:17:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:17:23,238 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2020-12-23 00:17:23,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:23,240 INFO L225 Difference]: With dead ends: 148 [2020-12-23 00:17:23,240 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 00:17:23,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 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 00:17:23,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 00:17:23,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2020-12-23 00:17:23,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 00:17:23,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 138 transitions. [2020-12-23 00:17:23,247 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 138 transitions. Word has length 72 [2020-12-23 00:17:23,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:23,247 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 138 transitions. [2020-12-23 00:17:23,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:17:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 138 transitions. [2020-12-23 00:17:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 00:17:23,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:23,249 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:23,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:17:23,463 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:23,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:23,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1756294580, now seen corresponding path program 6 times [2020-12-23 00:17:23,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:23,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330993795] [2020-12-23 00:17:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 00:17:23,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330993795] [2020-12-23 00:17:23,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115353308] [2020-12-23 00:17:23,672 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 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 00:17:23,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 00:17:23,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:23,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:17:23,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-12-23 00:17:23,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:23,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:17:23,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261232748] [2020-12-23 00:17:23,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:17:23,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:23,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:17:23,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:17:23,922 INFO L87 Difference]: Start difference. First operand 109 states and 138 transitions. Second operand 13 states. [2020-12-23 00:17:24,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:24,112 INFO L93 Difference]: Finished difference Result 162 states and 200 transitions. [2020-12-23 00:17:24,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:17:24,113 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-12-23 00:17:24,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:24,118 INFO L225 Difference]: With dead ends: 162 [2020-12-23 00:17:24,119 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 00:17:24,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 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 00:17:24,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 00:17:24,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-12-23 00:17:24,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 00:17:24,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 152 transitions. [2020-12-23 00:17:24,131 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 152 transitions. Word has length 80 [2020-12-23 00:17:24,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:24,136 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 152 transitions. [2020-12-23 00:17:24,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:17:24,136 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 152 transitions. [2020-12-23 00:17:24,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 00:17:24,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:24,162 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:24,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:24,364 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:24,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:24,365 INFO L82 PathProgramCache]: Analyzing trace with hash 714649314, now seen corresponding path program 7 times [2020-12-23 00:17:24,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:24,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686441591] [2020-12-23 00:17:24,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-23 00:17:24,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686441591] [2020-12-23 00:17:24,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143674741] [2020-12-23 00:17:24,508 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 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 00:17:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:24,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:17:24,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-23 00:17:24,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:24,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:17:24,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899769872] [2020-12-23 00:17:24,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:17:24,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:24,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:17:24,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:17:24,686 INFO L87 Difference]: Start difference. First operand 120 states and 152 transitions. Second operand 14 states. [2020-12-23 00:17:24,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:24,879 INFO L93 Difference]: Finished difference Result 176 states and 217 transitions. [2020-12-23 00:17:24,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:17:24,879 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 88 [2020-12-23 00:17:24,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:24,882 INFO L225 Difference]: With dead ends: 176 [2020-12-23 00:17:24,882 INFO L226 Difference]: Without dead ends: 139 [2020-12-23 00:17:24,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 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 00:17:24,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-23 00:17:24,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2020-12-23 00:17:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 00:17:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 166 transitions. [2020-12-23 00:17:24,892 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 166 transitions. Word has length 88 [2020-12-23 00:17:24,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:24,892 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 166 transitions. [2020-12-23 00:17:24,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:17:24,892 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 166 transitions. [2020-12-23 00:17:24,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 00:17:24,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:24,893 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:25,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:25,096 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:25,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:25,097 INFO L82 PathProgramCache]: Analyzing trace with hash -483292532, now seen corresponding path program 8 times [2020-12-23 00:17:25,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:25,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316395457] [2020-12-23 00:17:25,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 00:17:25,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316395457] [2020-12-23 00:17:25,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120099103] [2020-12-23 00:17:25,328 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:25,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:25,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:25,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:17:25,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 00:17:25,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:25,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 00:17:25,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63366820] [2020-12-23 00:17:25,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:17:25,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:25,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:17:25,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:17:25,512 INFO L87 Difference]: Start difference. First operand 131 states and 166 transitions. Second operand 15 states. [2020-12-23 00:17:25,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:25,709 INFO L93 Difference]: Finished difference Result 190 states and 234 transitions. [2020-12-23 00:17:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:17:25,710 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2020-12-23 00:17:25,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:25,711 INFO L225 Difference]: With dead ends: 190 [2020-12-23 00:17:25,711 INFO L226 Difference]: Without dead ends: 150 [2020-12-23 00:17:25,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:17:25,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-23 00:17:25,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 142. [2020-12-23 00:17:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 00:17:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 180 transitions. [2020-12-23 00:17:25,718 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 180 transitions. Word has length 96 [2020-12-23 00:17:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:25,718 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 180 transitions. [2020-12-23 00:17:25,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:17:25,718 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 180 transitions. [2020-12-23 00:17:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 00:17:25,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:25,720 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:25,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:17:25,934 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:25,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:25,935 INFO L82 PathProgramCache]: Analyzing trace with hash 457039522, now seen corresponding path program 9 times [2020-12-23 00:17:25,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:25,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472038291] [2020-12-23 00:17:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-23 00:17:26,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472038291] [2020-12-23 00:17:26,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681225123] [2020-12-23 00:17:26,156 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:26,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-23 00:17:26,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:26,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:17:26,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-23 00:17:26,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:26,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 00:17:26,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323880779] [2020-12-23 00:17:26,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:17:26,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:26,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:17:26,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:17:26,479 INFO L87 Difference]: Start difference. First operand 142 states and 180 transitions. Second operand 16 states. [2020-12-23 00:17:26,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:26,699 INFO L93 Difference]: Finished difference Result 204 states and 251 transitions. [2020-12-23 00:17:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:17:26,700 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2020-12-23 00:17:26,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:26,701 INFO L225 Difference]: With dead ends: 204 [2020-12-23 00:17:26,701 INFO L226 Difference]: Without dead ends: 161 [2020-12-23 00:17:26,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:17:26,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-23 00:17:26,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 153. [2020-12-23 00:17:26,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 00:17:26,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 194 transitions. [2020-12-23 00:17:26,707 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 194 transitions. Word has length 104 [2020-12-23 00:17:26,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:26,707 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 194 transitions. [2020-12-23 00:17:26,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:17:26,708 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 194 transitions. [2020-12-23 00:17:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 00:17:26,709 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:26,709 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:26,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:17:26,924 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:26,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:26,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1888693556, now seen corresponding path program 10 times [2020-12-23 00:17:26,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:26,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069890410] [2020-12-23 00:17:26,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-23 00:17:27,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069890410] [2020-12-23 00:17:27,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368139453] [2020-12-23 00:17:27,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:27,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:17:27,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:27,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:17:27,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-23 00:17:27,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:27,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 00:17:27,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015111575] [2020-12-23 00:17:27,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:17:27,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:27,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:17:27,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:17:27,382 INFO L87 Difference]: Start difference. First operand 153 states and 194 transitions. Second operand 17 states. [2020-12-23 00:17:27,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:27,626 INFO L93 Difference]: Finished difference Result 218 states and 268 transitions. [2020-12-23 00:17:27,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:17:27,627 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2020-12-23 00:17:27,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:27,628 INFO L225 Difference]: With dead ends: 218 [2020-12-23 00:17:27,628 INFO L226 Difference]: Without dead ends: 172 [2020-12-23 00:17:27,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:17:27,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-23 00:17:27,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2020-12-23 00:17:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 00:17:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 208 transitions. [2020-12-23 00:17:27,637 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 208 transitions. Word has length 112 [2020-12-23 00:17:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:27,638 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 208 transitions. [2020-12-23 00:17:27,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:17:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 208 transitions. [2020-12-23 00:17:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-23 00:17:27,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:27,639 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:27,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:17:27,854 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:27,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:27,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1790328418, now seen corresponding path program 11 times [2020-12-23 00:17:27,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:27,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586525871] [2020-12-23 00:17:27,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-23 00:17:28,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586525871] [2020-12-23 00:17:28,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947942226] [2020-12-23 00:17:28,063 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:28,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-12-23 00:17:28,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:28,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:17:28,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2020-12-23 00:17:28,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:28,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 00:17:28,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119124535] [2020-12-23 00:17:28,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:17:28,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:28,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:17:28,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:17:28,426 INFO L87 Difference]: Start difference. First operand 164 states and 208 transitions. Second operand 18 states. [2020-12-23 00:17:28,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:28,739 INFO L93 Difference]: Finished difference Result 232 states and 285 transitions. [2020-12-23 00:17:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:17:28,740 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 120 [2020-12-23 00:17:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:28,741 INFO L225 Difference]: With dead ends: 232 [2020-12-23 00:17:28,741 INFO L226 Difference]: Without dead ends: 183 [2020-12-23 00:17:28,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:17:28,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-23 00:17:28,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 175. [2020-12-23 00:17:28,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 00:17:28,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 222 transitions. [2020-12-23 00:17:28,749 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 222 transitions. Word has length 120 [2020-12-23 00:17:28,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:28,750 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 222 transitions. [2020-12-23 00:17:28,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:17:28,750 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 222 transitions. [2020-12-23 00:17:28,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-23 00:17:28,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:28,752 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:28,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:28,965 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:28,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:28,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1264129268, now seen corresponding path program 12 times [2020-12-23 00:17:28,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:28,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508310823] [2020-12-23 00:17:28,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-23 00:17:29,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508310823] [2020-12-23 00:17:29,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898024154] [2020-12-23 00:17:29,190 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:29,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-23 00:17:29,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:29,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:17:29,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2020-12-23 00:17:29,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:29,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 00:17:29,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391829796] [2020-12-23 00:17:29,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:17:29,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:29,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:17:29,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:17:29,648 INFO L87 Difference]: Start difference. First operand 175 states and 222 transitions. Second operand 19 states. [2020-12-23 00:17:29,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:29,898 INFO L93 Difference]: Finished difference Result 246 states and 302 transitions. [2020-12-23 00:17:29,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:17:29,899 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 128 [2020-12-23 00:17:29,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:29,900 INFO L225 Difference]: With dead ends: 246 [2020-12-23 00:17:29,900 INFO L226 Difference]: Without dead ends: 194 [2020-12-23 00:17:29,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:17:29,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-23 00:17:29,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 186. [2020-12-23 00:17:29,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 00:17:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 236 transitions. [2020-12-23 00:17:29,908 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 236 transitions. Word has length 128 [2020-12-23 00:17:29,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:29,908 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 236 transitions. [2020-12-23 00:17:29,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:17:29,908 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 236 transitions. [2020-12-23 00:17:29,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 00:17:29,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:29,910 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:30,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:17:30,124 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:30,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:30,125 INFO L82 PathProgramCache]: Analyzing trace with hash -841101790, now seen corresponding path program 13 times [2020-12-23 00:17:30,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:30,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443302235] [2020-12-23 00:17:30,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-23 00:17:30,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443302235] [2020-12-23 00:17:30,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352536259] [2020-12-23 00:17:30,368 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:30,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:17:30,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-23 00:17:30,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:30,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:17:30,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692170042] [2020-12-23 00:17:30,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:17:30,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:30,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:17:30,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:17:30,678 INFO L87 Difference]: Start difference. First operand 186 states and 236 transitions. Second operand 20 states. [2020-12-23 00:17:30,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:30,968 INFO L93 Difference]: Finished difference Result 260 states and 319 transitions. [2020-12-23 00:17:30,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:17:30,969 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-12-23 00:17:30,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:30,971 INFO L225 Difference]: With dead ends: 260 [2020-12-23 00:17:30,971 INFO L226 Difference]: Without dead ends: 205 [2020-12-23 00:17:30,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:17:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-23 00:17:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 197. [2020-12-23 00:17:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-23 00:17:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 250 transitions. [2020-12-23 00:17:30,978 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 250 transitions. Word has length 136 [2020-12-23 00:17:30,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:30,979 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 250 transitions. [2020-12-23 00:17:30,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:17:30,979 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 250 transitions. [2020-12-23 00:17:30,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-23 00:17:30,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:30,981 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:31,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:17:31,194 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:31,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:31,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1619252044, now seen corresponding path program 14 times [2020-12-23 00:17:31,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:31,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745669236] [2020-12-23 00:17:31,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-12-23 00:17:31,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745669236] [2020-12-23 00:17:31,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555156290] [2020-12-23 00:17:31,449 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:31,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:31,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:31,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:17:31,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-12-23 00:17:31,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:31,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 00:17:31,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761194763] [2020-12-23 00:17:31,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:17:31,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:31,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:17:31,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:17:31,704 INFO L87 Difference]: Start difference. First operand 197 states and 250 transitions. Second operand 21 states. [2020-12-23 00:17:32,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:32,037 INFO L93 Difference]: Finished difference Result 274 states and 336 transitions. [2020-12-23 00:17:32,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:17:32,038 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 144 [2020-12-23 00:17:32,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:32,039 INFO L225 Difference]: With dead ends: 274 [2020-12-23 00:17:32,039 INFO L226 Difference]: Without dead ends: 216 [2020-12-23 00:17:32,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:17:32,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-23 00:17:32,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2020-12-23 00:17:32,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-12-23 00:17:32,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 264 transitions. [2020-12-23 00:17:32,046 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 264 transitions. Word has length 144 [2020-12-23 00:17:32,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:32,047 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 264 transitions. [2020-12-23 00:17:32,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:17:32,047 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 264 transitions. [2020-12-23 00:17:32,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-23 00:17:32,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:32,049 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:32,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:32,263 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:32,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:32,263 INFO L82 PathProgramCache]: Analyzing trace with hash -460288542, now seen corresponding path program 15 times [2020-12-23 00:17:32,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:32,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092583831] [2020-12-23 00:17:32,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-12-23 00:17:32,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092583831] [2020-12-23 00:17:32,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427086884] [2020-12-23 00:17:32,582 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:33,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-12-23 00:17:33,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:33,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:17:33,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-12-23 00:17:33,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:33,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 00:17:33,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260874006] [2020-12-23 00:17:33,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:17:33,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:33,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:17:33,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:17:33,440 INFO L87 Difference]: Start difference. First operand 208 states and 264 transitions. Second operand 22 states. [2020-12-23 00:17:33,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:33,807 INFO L93 Difference]: Finished difference Result 288 states and 353 transitions. [2020-12-23 00:17:33,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:17:33,808 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 152 [2020-12-23 00:17:33,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:33,810 INFO L225 Difference]: With dead ends: 288 [2020-12-23 00:17:33,811 INFO L226 Difference]: Without dead ends: 227 [2020-12-23 00:17:33,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:17:33,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-23 00:17:33,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 219. [2020-12-23 00:17:33,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-23 00:17:33,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 278 transitions. [2020-12-23 00:17:33,819 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 278 transitions. Word has length 152 [2020-12-23 00:17:33,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:33,819 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 278 transitions. [2020-12-23 00:17:33,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:17:33,819 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 278 transitions. [2020-12-23 00:17:33,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-23 00:17:33,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:33,821 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:34,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:34,036 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:34,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:34,037 INFO L82 PathProgramCache]: Analyzing trace with hash -710440052, now seen corresponding path program 16 times [2020-12-23 00:17:34,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:34,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440192467] [2020-12-23 00:17:34,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-12-23 00:17:34,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440192467] [2020-12-23 00:17:34,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147003138] [2020-12-23 00:17:34,361 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:34,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:17:34,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:34,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:17:34,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-12-23 00:17:34,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:34,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 00:17:34,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555855716] [2020-12-23 00:17:34,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:17:34,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:34,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:17:34,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:17:34,617 INFO L87 Difference]: Start difference. First operand 219 states and 278 transitions. Second operand 23 states. [2020-12-23 00:17:34,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:34,970 INFO L93 Difference]: Finished difference Result 302 states and 370 transitions. [2020-12-23 00:17:34,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:17:34,971 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 160 [2020-12-23 00:17:34,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:34,972 INFO L225 Difference]: With dead ends: 302 [2020-12-23 00:17:34,972 INFO L226 Difference]: Without dead ends: 238 [2020-12-23 00:17:34,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:17:34,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-23 00:17:34,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 230. [2020-12-23 00:17:34,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-12-23 00:17:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 292 transitions. [2020-12-23 00:17:34,980 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 292 transitions. Word has length 160 [2020-12-23 00:17:34,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:34,980 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 292 transitions. [2020-12-23 00:17:34,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:17:34,981 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 292 transitions. [2020-12-23 00:17:34,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-23 00:17:34,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:34,982 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:35,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:35,196 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:35,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:35,197 INFO L82 PathProgramCache]: Analyzing trace with hash -106267230, now seen corresponding path program 17 times [2020-12-23 00:17:35,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:35,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231668314] [2020-12-23 00:17:35,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-12-23 00:17:35,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231668314] [2020-12-23 00:17:35,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578968840] [2020-12-23 00:17:35,558 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:36,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-23 00:17:36,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:36,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 00:17:36,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2020-12-23 00:17:36,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:36,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 00:17:36,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509152881] [2020-12-23 00:17:36,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 00:17:36,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:36,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 00:17:36,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:17:36,208 INFO L87 Difference]: Start difference. First operand 230 states and 292 transitions. Second operand 24 states. [2020-12-23 00:17:36,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:36,575 INFO L93 Difference]: Finished difference Result 316 states and 387 transitions. [2020-12-23 00:17:36,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 00:17:36,579 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 168 [2020-12-23 00:17:36,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:36,581 INFO L225 Difference]: With dead ends: 316 [2020-12-23 00:17:36,581 INFO L226 Difference]: Without dead ends: 249 [2020-12-23 00:17:36,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:17:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-12-23 00:17:36,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 241. [2020-12-23 00:17:36,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-23 00:17:36,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 306 transitions. [2020-12-23 00:17:36,588 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 306 transitions. Word has length 168 [2020-12-23 00:17:36,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:36,589 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 306 transitions. [2020-12-23 00:17:36,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 00:17:36,589 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 306 transitions. [2020-12-23 00:17:36,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-23 00:17:36,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:36,590 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:36,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:17:36,800 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:36,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:36,801 INFO L82 PathProgramCache]: Analyzing trace with hash -877259828, now seen corresponding path program 18 times [2020-12-23 00:17:36,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:36,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495893953] [2020-12-23 00:17:36,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-12-23 00:17:37,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495893953] [2020-12-23 00:17:37,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114382238] [2020-12-23 00:17:37,206 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:39,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-12-23 00:17:39,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:39,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:17:39,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-12-23 00:17:39,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:39,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 00:17:39,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777327669] [2020-12-23 00:17:39,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 00:17:39,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:39,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 00:17:39,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:17:39,813 INFO L87 Difference]: Start difference. First operand 241 states and 306 transitions. Second operand 25 states. [2020-12-23 00:17:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:40,228 INFO L93 Difference]: Finished difference Result 330 states and 404 transitions. [2020-12-23 00:17:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:17:40,228 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 176 [2020-12-23 00:17:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:40,230 INFO L225 Difference]: With dead ends: 330 [2020-12-23 00:17:40,230 INFO L226 Difference]: Without dead ends: 260 [2020-12-23 00:17:40,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:17:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-23 00:17:40,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 252. [2020-12-23 00:17:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-12-23 00:17:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 320 transitions. [2020-12-23 00:17:40,238 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 320 transitions. Word has length 176 [2020-12-23 00:17:40,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:40,238 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 320 transitions. [2020-12-23 00:17:40,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 00:17:40,239 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 320 transitions. [2020-12-23 00:17:40,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-23 00:17:40,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:40,240 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:40,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:17:40,456 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:40,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:40,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1022911134, now seen corresponding path program 19 times [2020-12-23 00:17:40,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:40,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260762935] [2020-12-23 00:17:40,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-12-23 00:17:40,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260762935] [2020-12-23 00:17:40,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429560574] [2020-12-23 00:17:40,865 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:40,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:17:40,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-12-23 00:17:41,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:41,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 00:17:41,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524008140] [2020-12-23 00:17:41,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:17:41,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:41,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:17:41,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:17:41,157 INFO L87 Difference]: Start difference. First operand 252 states and 320 transitions. Second operand 26 states. [2020-12-23 00:17:41,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:41,598 INFO L93 Difference]: Finished difference Result 344 states and 421 transitions. [2020-12-23 00:17:41,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 00:17:41,599 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 184 [2020-12-23 00:17:41,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:41,601 INFO L225 Difference]: With dead ends: 344 [2020-12-23 00:17:41,601 INFO L226 Difference]: Without dead ends: 271 [2020-12-23 00:17:41,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:17:41,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-12-23 00:17:41,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 263. [2020-12-23 00:17:41,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-12-23 00:17:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 334 transitions. [2020-12-23 00:17:41,609 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 334 transitions. Word has length 184 [2020-12-23 00:17:41,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:41,609 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 334 transitions. [2020-12-23 00:17:41,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:17:41,610 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 334 transitions. [2020-12-23 00:17:41,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-23 00:17:41,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:41,611 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:41,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:41,826 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:41,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:41,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1353487348, now seen corresponding path program 20 times [2020-12-23 00:17:41,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:41,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055455443] [2020-12-23 00:17:41,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-12-23 00:17:42,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055455443] [2020-12-23 00:17:42,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415703110] [2020-12-23 00:17:42,304 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:42,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:42,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:42,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 00:17:42,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-12-23 00:17:42,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:42,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 00:17:42,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502324715] [2020-12-23 00:17:42,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 00:17:42,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:42,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 00:17:42,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:17:42,623 INFO L87 Difference]: Start difference. First operand 263 states and 334 transitions. Second operand 27 states. [2020-12-23 00:17:43,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:43,058 INFO L93 Difference]: Finished difference Result 358 states and 438 transitions. [2020-12-23 00:17:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:17:43,058 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 192 [2020-12-23 00:17:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:43,060 INFO L225 Difference]: With dead ends: 358 [2020-12-23 00:17:43,060 INFO L226 Difference]: Without dead ends: 282 [2020-12-23 00:17:43,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:17:43,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-23 00:17:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 274. [2020-12-23 00:17:43,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-12-23 00:17:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 348 transitions. [2020-12-23 00:17:43,068 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 348 transitions. Word has length 192 [2020-12-23 00:17:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:43,069 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 348 transitions. [2020-12-23 00:17:43,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 00:17:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 348 transitions. [2020-12-23 00:17:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-12-23 00:17:43,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:43,070 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:43,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 00:17:43,284 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:43,284 INFO L82 PathProgramCache]: Analyzing trace with hash 562294050, now seen corresponding path program 21 times [2020-12-23 00:17:43,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:43,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837053005] [2020-12-23 00:17:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-12-23 00:17:43,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837053005] [2020-12-23 00:17:43,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035401594] [2020-12-23 00:17:43,780 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 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 [2020-12-23 00:17:48,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2020-12-23 00:17:48,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:48,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:17:48,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-12-23 00:17:48,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:48,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 00:17:48,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129401068] [2020-12-23 00:17:48,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:17:48,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:48,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:17:48,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:17:48,415 INFO L87 Difference]: Start difference. First operand 274 states and 348 transitions. Second operand 28 states. [2020-12-23 00:17:48,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:48,875 INFO L93 Difference]: Finished difference Result 372 states and 455 transitions. [2020-12-23 00:17:48,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:17:48,875 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 200 [2020-12-23 00:17:48,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:48,877 INFO L225 Difference]: With dead ends: 372 [2020-12-23 00:17:48,877 INFO L226 Difference]: Without dead ends: 293 [2020-12-23 00:17:48,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:17:48,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-12-23 00:17:48,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 285. [2020-12-23 00:17:48,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-12-23 00:17:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 362 transitions. [2020-12-23 00:17:48,886 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 362 transitions. Word has length 200 [2020-12-23 00:17:48,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:48,886 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 362 transitions. [2020-12-23 00:17:48,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:17:48,887 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 362 transitions. [2020-12-23 00:17:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-12-23 00:17:48,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:48,888 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:49,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:49,102 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:49,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:49,103 INFO L82 PathProgramCache]: Analyzing trace with hash -500984756, now seen corresponding path program 22 times [2020-12-23 00:17:49,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:49,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487605461] [2020-12-23 00:17:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-12-23 00:17:49,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487605461] [2020-12-23 00:17:49,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653620456] [2020-12-23 00:17:49,588 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 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 [2020-12-23 00:17:49,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:17:49,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:49,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:17:49,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:49,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-12-23 00:17:49,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:49,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 00:17:49,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416028496] [2020-12-23 00:17:49,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:17:49,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:49,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:17:49,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:17:49,921 INFO L87 Difference]: Start difference. First operand 285 states and 362 transitions. Second operand 29 states. [2020-12-23 00:17:50,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:50,402 INFO L93 Difference]: Finished difference Result 386 states and 472 transitions. [2020-12-23 00:17:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:17:50,403 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 208 [2020-12-23 00:17:50,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:50,405 INFO L225 Difference]: With dead ends: 386 [2020-12-23 00:17:50,405 INFO L226 Difference]: Without dead ends: 304 [2020-12-23 00:17:50,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:17:50,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-12-23 00:17:50,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 296. [2020-12-23 00:17:50,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-12-23 00:17:50,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 376 transitions. [2020-12-23 00:17:50,414 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 376 transitions. Word has length 208 [2020-12-23 00:17:50,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:50,414 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 376 transitions. [2020-12-23 00:17:50,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:17:50,414 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 376 transitions. [2020-12-23 00:17:50,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-23 00:17:50,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:50,416 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:50,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:17:50,631 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:50,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:50,632 INFO L82 PathProgramCache]: Analyzing trace with hash -520393502, now seen corresponding path program 23 times [2020-12-23 00:17:50,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:50,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243749068] [2020-12-23 00:17:50,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-12-23 00:17:51,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243749068] [2020-12-23 00:17:51,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937154075] [2020-12-23 00:17:51,182 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 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 [2020-12-23 00:17:52,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2020-12-23 00:17:52,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:52,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 00:17:52,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-12-23 00:17:53,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:53,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 00:17:53,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742668222] [2020-12-23 00:17:53,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 00:17:53,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:53,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 00:17:53,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:17:53,080 INFO L87 Difference]: Start difference. First operand 296 states and 376 transitions. Second operand 30 states. [2020-12-23 00:17:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:53,592 INFO L93 Difference]: Finished difference Result 400 states and 489 transitions. [2020-12-23 00:17:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 00:17:53,593 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 216 [2020-12-23 00:17:53,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:53,596 INFO L225 Difference]: With dead ends: 400 [2020-12-23 00:17:53,596 INFO L226 Difference]: Without dead ends: 315 [2020-12-23 00:17:53,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:17:53,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-12-23 00:17:53,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 307. [2020-12-23 00:17:53,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-12-23 00:17:53,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 390 transitions. [2020-12-23 00:17:53,606 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 390 transitions. Word has length 216 [2020-12-23 00:17:53,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:53,606 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 390 transitions. [2020-12-23 00:17:53,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 00:17:53,606 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 390 transitions. [2020-12-23 00:17:53,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-23 00:17:53,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:53,608 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:53,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:17:53,823 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:53,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:53,824 INFO L82 PathProgramCache]: Analyzing trace with hash -87389044, now seen corresponding path program 24 times [2020-12-23 00:17:53,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:53,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511736197] [2020-12-23 00:17:53,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-12-23 00:17:54,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511736197] [2020-12-23 00:17:54,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350854789] [2020-12-23 00:17:54,422 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 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 [2020-12-23 00:18:00,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2020-12-23 00:18:00,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:00,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 00:18:00,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2020-12-23 00:18:01,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:01,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 00:18:01,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241127991] [2020-12-23 00:18:01,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:18:01,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:01,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:18:01,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:18:01,099 INFO L87 Difference]: Start difference. First operand 307 states and 390 transitions. Second operand 31 states. [2020-12-23 00:18:01,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:01,586 INFO L93 Difference]: Finished difference Result 414 states and 506 transitions. [2020-12-23 00:18:01,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:18:01,587 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 224 [2020-12-23 00:18:01,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:01,589 INFO L225 Difference]: With dead ends: 414 [2020-12-23 00:18:01,589 INFO L226 Difference]: Without dead ends: 326 [2020-12-23 00:18:01,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:18:01,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-12-23 00:18:01,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2020-12-23 00:18:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-12-23 00:18:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 404 transitions. [2020-12-23 00:18:01,598 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 404 transitions. Word has length 224 [2020-12-23 00:18:01,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:01,598 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 404 transitions. [2020-12-23 00:18:01,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:18:01,598 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 404 transitions. [2020-12-23 00:18:01,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-12-23 00:18:01,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:01,600 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:01,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:18:01,815 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:01,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:01,815 INFO L82 PathProgramCache]: Analyzing trace with hash 2018122914, now seen corresponding path program 25 times [2020-12-23 00:18:01,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:01,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925497990] [2020-12-23 00:18:01,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-12-23 00:18:02,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925497990] [2020-12-23 00:18:02,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174181879] [2020-12-23 00:18:02,499 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 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 [2020-12-23 00:18:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:02,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 00:18:02,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-12-23 00:18:02,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:02,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 00:18:02,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296826052] [2020-12-23 00:18:02,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:18:02,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:02,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:18:02,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:18:02,860 INFO L87 Difference]: Start difference. First operand 318 states and 404 transitions. Second operand 32 states. [2020-12-23 00:18:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:03,448 INFO L93 Difference]: Finished difference Result 428 states and 523 transitions. [2020-12-23 00:18:03,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 00:18:03,449 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 232 [2020-12-23 00:18:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:03,450 INFO L225 Difference]: With dead ends: 428 [2020-12-23 00:18:03,450 INFO L226 Difference]: Without dead ends: 337 [2020-12-23 00:18:03,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:18:03,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-12-23 00:18:03,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 329. [2020-12-23 00:18:03,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-12-23 00:18:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 418 transitions. [2020-12-23 00:18:03,459 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 418 transitions. Word has length 232 [2020-12-23 00:18:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:03,460 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 418 transitions. [2020-12-23 00:18:03,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:18:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 418 transitions. [2020-12-23 00:18:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-12-23 00:18:03,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:03,462 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:03,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:03,676 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:03,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:03,677 INFO L82 PathProgramCache]: Analyzing trace with hash 82597068, now seen corresponding path program 26 times [2020-12-23 00:18:03,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:03,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214042871] [2020-12-23 00:18:03,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-12-23 00:18:04,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214042871] [2020-12-23 00:18:04,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351092414] [2020-12-23 00:18:04,355 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 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 [2020-12-23 00:18:04,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:18:04,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:04,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 00:18:04,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-12-23 00:18:04,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:04,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 00:18:04,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331564333] [2020-12-23 00:18:04,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 00:18:04,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:04,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 00:18:04,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:18:04,741 INFO L87 Difference]: Start difference. First operand 329 states and 418 transitions. Second operand 33 states. [2020-12-23 00:18:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:05,288 INFO L93 Difference]: Finished difference Result 442 states and 540 transitions. [2020-12-23 00:18:05,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:18:05,289 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 240 [2020-12-23 00:18:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:05,290 INFO L225 Difference]: With dead ends: 442 [2020-12-23 00:18:05,290 INFO L226 Difference]: Without dead ends: 348 [2020-12-23 00:18:05,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:18:05,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-12-23 00:18:05,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 340. [2020-12-23 00:18:05,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-12-23 00:18:05,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 432 transitions. [2020-12-23 00:18:05,299 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 432 transitions. Word has length 240 [2020-12-23 00:18:05,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:05,300 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 432 transitions. [2020-12-23 00:18:05,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 00:18:05,300 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 432 transitions. [2020-12-23 00:18:05,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-12-23 00:18:05,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:05,301 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:05,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 00:18:05,515 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:05,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:05,516 INFO L82 PathProgramCache]: Analyzing trace with hash -917767070, now seen corresponding path program 27 times [2020-12-23 00:18:05,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:05,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439895313] [2020-12-23 00:18:05,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2020-12-23 00:18:06,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439895313] [2020-12-23 00:18:06,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33752688] [2020-12-23 00:18:06,217 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 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 [2020-12-23 00:18:11,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2020-12-23 00:18:11,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:11,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 00:18:11,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2020-12-23 00:18:11,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:11,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 00:18:11,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586270622] [2020-12-23 00:18:11,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:18:11,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:11,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:18:11,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:18:11,832 INFO L87 Difference]: Start difference. First operand 340 states and 432 transitions. Second operand 34 states. [2020-12-23 00:18:12,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:12,448 INFO L93 Difference]: Finished difference Result 456 states and 557 transitions. [2020-12-23 00:18:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 00:18:12,449 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 248 [2020-12-23 00:18:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:12,450 INFO L225 Difference]: With dead ends: 456 [2020-12-23 00:18:12,450 INFO L226 Difference]: Without dead ends: 359 [2020-12-23 00:18:12,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:18:12,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-12-23 00:18:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 351. [2020-12-23 00:18:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-12-23 00:18:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 446 transitions. [2020-12-23 00:18:12,460 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 446 transitions. Word has length 248 [2020-12-23 00:18:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:12,460 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 446 transitions. [2020-12-23 00:18:12,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:18:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 446 transitions. [2020-12-23 00:18:12,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-23 00:18:12,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:12,462 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:12,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:12,678 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:12,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:12,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1054020340, now seen corresponding path program 28 times [2020-12-23 00:18:12,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:12,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91982135] [2020-12-23 00:18:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-12-23 00:18:13,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91982135] [2020-12-23 00:18:13,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040995768] [2020-12-23 00:18:13,416 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:13,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:18:13,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:13,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:18:13,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-12-23 00:18:13,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:13,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 00:18:13,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806364509] [2020-12-23 00:18:13,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 00:18:13,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:13,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 00:18:13,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:18:13,819 INFO L87 Difference]: Start difference. First operand 351 states and 446 transitions. Second operand 35 states. [2020-12-23 00:18:14,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:14,452 INFO L93 Difference]: Finished difference Result 470 states and 574 transitions. [2020-12-23 00:18:14,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:18:14,452 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 256 [2020-12-23 00:18:14,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:14,456 INFO L225 Difference]: With dead ends: 470 [2020-12-23 00:18:14,456 INFO L226 Difference]: Without dead ends: 370 [2020-12-23 00:18:14,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:18:14,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-12-23 00:18:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 362. [2020-12-23 00:18:14,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-12-23 00:18:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 460 transitions. [2020-12-23 00:18:14,466 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 460 transitions. Word has length 256 [2020-12-23 00:18:14,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:14,467 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 460 transitions. [2020-12-23 00:18:14,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 00:18:14,467 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 460 transitions. [2020-12-23 00:18:14,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-12-23 00:18:14,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:14,469 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:14,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 00:18:14,682 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:14,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:14,683 INFO L82 PathProgramCache]: Analyzing trace with hash -522384350, now seen corresponding path program 29 times [2020-12-23 00:18:14,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:14,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199582817] [2020-12-23 00:18:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2020-12-23 00:18:15,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199582817] [2020-12-23 00:18:15,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031008353] [2020-12-23 00:18:15,419 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:19,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2020-12-23 00:18:19,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:19,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 00:18:19,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2020-12-23 00:18:20,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:20,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 00:18:20,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441669074] [2020-12-23 00:18:20,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 00:18:20,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:20,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 00:18:20,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:18:20,119 INFO L87 Difference]: Start difference. First operand 362 states and 460 transitions. Second operand 36 states. [2020-12-23 00:18:20,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:20,779 INFO L93 Difference]: Finished difference Result 484 states and 591 transitions. [2020-12-23 00:18:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 00:18:20,779 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 264 [2020-12-23 00:18:20,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:20,784 INFO L225 Difference]: With dead ends: 484 [2020-12-23 00:18:20,785 INFO L226 Difference]: Without dead ends: 381 [2020-12-23 00:18:20,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:18:20,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-12-23 00:18:20,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 373. [2020-12-23 00:18:20,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-12-23 00:18:20,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 474 transitions. [2020-12-23 00:18:20,794 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 474 transitions. Word has length 264 [2020-12-23 00:18:20,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:20,794 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 474 transitions. [2020-12-23 00:18:20,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 00:18:20,794 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 474 transitions. [2020-12-23 00:18:20,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-12-23 00:18:20,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:20,796 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:21,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 00:18:21,010 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:21,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:21,011 INFO L82 PathProgramCache]: Analyzing trace with hash -449817268, now seen corresponding path program 30 times [2020-12-23 00:18:21,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:21,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849214925] [2020-12-23 00:18:21,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-12-23 00:18:21,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849214925] [2020-12-23 00:18:21,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597841174] [2020-12-23 00:18:21,853 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:51,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2020-12-23 00:18:51,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:51,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 00:18:51,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-12-23 00:18:52,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:52,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 00:18:52,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414893452] [2020-12-23 00:18:52,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:18:52,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:52,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:18:52,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:18:52,178 INFO L87 Difference]: Start difference. First operand 373 states and 474 transitions. Second operand 37 states. [2020-12-23 00:18:52,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:52,870 INFO L93 Difference]: Finished difference Result 498 states and 608 transitions. [2020-12-23 00:18:52,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 00:18:52,870 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 272 [2020-12-23 00:18:52,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:52,873 INFO L225 Difference]: With dead ends: 498 [2020-12-23 00:18:52,873 INFO L226 Difference]: Without dead ends: 392 [2020-12-23 00:18:52,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:18:52,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-12-23 00:18:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 384. [2020-12-23 00:18:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-12-23 00:18:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 488 transitions. [2020-12-23 00:18:52,883 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 488 transitions. Word has length 272 [2020-12-23 00:18:52,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:52,883 INFO L481 AbstractCegarLoop]: Abstraction has 384 states and 488 transitions. [2020-12-23 00:18:52,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:18:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 488 transitions. [2020-12-23 00:18:52,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-12-23 00:18:52,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:52,885 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:53,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 00:18:53,100 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:53,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1227273246, now seen corresponding path program 31 times [2020-12-23 00:18:53,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:53,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814777128] [2020-12-23 00:18:53,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2020-12-23 00:18:54,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814777128] [2020-12-23 00:18:54,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449266410] [2020-12-23 00:18:54,008 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:54,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 00:18:54,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2020-12-23 00:18:54,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:54,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 00:18:54,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382510794] [2020-12-23 00:18:54,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 00:18:54,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:54,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 00:18:54,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:18:54,449 INFO L87 Difference]: Start difference. First operand 384 states and 488 transitions. Second operand 38 states. [2020-12-23 00:18:55,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:55,111 INFO L93 Difference]: Finished difference Result 512 states and 625 transitions. [2020-12-23 00:18:55,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:18:55,112 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 280 [2020-12-23 00:18:55,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:55,115 INFO L225 Difference]: With dead ends: 512 [2020-12-23 00:18:55,115 INFO L226 Difference]: Without dead ends: 403 [2020-12-23 00:18:55,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:18:55,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-12-23 00:18:55,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 395. [2020-12-23 00:18:55,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-23 00:18:55,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 502 transitions. [2020-12-23 00:18:55,125 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 502 transitions. Word has length 280 [2020-12-23 00:18:55,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:55,125 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 502 transitions. [2020-12-23 00:18:55,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 00:18:55,126 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 502 transitions. [2020-12-23 00:18:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-12-23 00:18:55,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:55,128 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:55,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 00:18:55,342 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:55,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:55,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1536855436, now seen corresponding path program 32 times [2020-12-23 00:18:55,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:55,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402694780] [2020-12-23 00:18:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2020-12-23 00:18:56,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402694780] [2020-12-23 00:18:56,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105239595] [2020-12-23 00:18:56,287 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:56,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:18:56,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:56,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 00:18:56,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2020-12-23 00:18:56,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:56,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 00:18:56,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920521770] [2020-12-23 00:18:56,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 00:18:56,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:56,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 00:18:56,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:18:56,750 INFO L87 Difference]: Start difference. First operand 395 states and 502 transitions. Second operand 39 states. [2020-12-23 00:18:57,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:57,470 INFO L93 Difference]: Finished difference Result 526 states and 642 transitions. [2020-12-23 00:18:57,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 00:18:57,471 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 288 [2020-12-23 00:18:57,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:57,473 INFO L225 Difference]: With dead ends: 526 [2020-12-23 00:18:57,473 INFO L226 Difference]: Without dead ends: 414 [2020-12-23 00:18:57,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:18:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-12-23 00:18:57,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 406. [2020-12-23 00:18:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-12-23 00:18:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 516 transitions. [2020-12-23 00:18:57,482 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 516 transitions. Word has length 288 [2020-12-23 00:18:57,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:57,483 INFO L481 AbstractCegarLoop]: Abstraction has 406 states and 516 transitions. [2020-12-23 00:18:57,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 00:18:57,483 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 516 transitions. [2020-12-23 00:18:57,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-12-23 00:18:57,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:57,485 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:57,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 00:18:57,700 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:57,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash -300106846, now seen corresponding path program 33 times [2020-12-23 00:18:57,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:57,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779589955] [2020-12-23 00:18:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2020-12-23 00:18:58,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779589955] [2020-12-23 00:18:58,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631326485] [2020-12-23 00:18:58,654 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:19:28,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2020-12-23 00:19:28,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:19:28,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 00:19:28,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2020-12-23 00:19:29,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:29,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 00:19:29,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383003540] [2020-12-23 00:19:29,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:19:29,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:29,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:19:29,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:19:29,039 INFO L87 Difference]: Start difference. First operand 406 states and 516 transitions. Second operand 40 states. [2020-12-23 00:19:29,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:29,794 INFO L93 Difference]: Finished difference Result 540 states and 659 transitions. [2020-12-23 00:19:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 00:19:29,794 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 296 [2020-12-23 00:19:29,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:29,796 INFO L225 Difference]: With dead ends: 540 [2020-12-23 00:19:29,797 INFO L226 Difference]: Without dead ends: 425 [2020-12-23 00:19:29,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:19:29,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-12-23 00:19:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 417. [2020-12-23 00:19:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-12-23 00:19:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 530 transitions. [2020-12-23 00:19:29,807 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 530 transitions. Word has length 296 [2020-12-23 00:19:29,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:29,807 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 530 transitions. [2020-12-23 00:19:29,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:19:29,807 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 530 transitions. [2020-12-23 00:19:29,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-12-23 00:19:29,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:29,809 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:30,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 00:19:30,025 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:30,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:30,025 INFO L82 PathProgramCache]: Analyzing trace with hash -2079353396, now seen corresponding path program 34 times [2020-12-23 00:19:30,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:30,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373976405] [2020-12-23 00:19:30,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2020-12-23 00:19:31,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373976405] [2020-12-23 00:19:31,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144432948] [2020-12-23 00:19:31,063 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:19:31,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:19:31,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:19:31,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 00:19:31,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2020-12-23 00:19:31,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:31,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 00:19:31,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270247898] [2020-12-23 00:19:31,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:19:31,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:31,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:19:31,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:19:31,539 INFO L87 Difference]: Start difference. First operand 417 states and 530 transitions. Second operand 41 states. [2020-12-23 00:19:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:32,292 INFO L93 Difference]: Finished difference Result 554 states and 676 transitions. [2020-12-23 00:19:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:19:32,292 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 304 [2020-12-23 00:19:32,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:32,295 INFO L225 Difference]: With dead ends: 554 [2020-12-23 00:19:32,295 INFO L226 Difference]: Without dead ends: 436 [2020-12-23 00:19:32,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:19:32,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-12-23 00:19:32,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 428. [2020-12-23 00:19:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-12-23 00:19:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 544 transitions. [2020-12-23 00:19:32,305 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 544 transitions. Word has length 304 [2020-12-23 00:19:32,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:32,305 INFO L481 AbstractCegarLoop]: Abstraction has 428 states and 544 transitions. [2020-12-23 00:19:32,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:19:32,306 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 544 transitions. [2020-12-23 00:19:32,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-12-23 00:19:32,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:32,308 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:32,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 00:19:32,522 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:32,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:32,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1803330718, now seen corresponding path program 35 times [2020-12-23 00:19:32,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:32,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221965739] [2020-12-23 00:19:32,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2020-12-23 00:19:33,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221965739] [2020-12-23 00:19:33,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713412965] [2020-12-23 00:19:33,679 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:19:42,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2020-12-23 00:19:42,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:19:42,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 00:19:42,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 3553 trivial. 0 not checked. [2020-12-23 00:19:43,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:43,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 00:19:43,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987074807] [2020-12-23 00:19:43,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 00:19:43,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:43,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 00:19:43,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:19:43,291 INFO L87 Difference]: Start difference. First operand 428 states and 544 transitions. Second operand 42 states. [2020-12-23 00:19:44,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:44,017 INFO L93 Difference]: Finished difference Result 568 states and 693 transitions. [2020-12-23 00:19:44,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 00:19:44,018 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 312 [2020-12-23 00:19:44,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:44,020 INFO L225 Difference]: With dead ends: 568 [2020-12-23 00:19:44,020 INFO L226 Difference]: Without dead ends: 447 [2020-12-23 00:19:44,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:19:44,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-12-23 00:19:44,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 439. [2020-12-23 00:19:44,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-12-23 00:19:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 558 transitions. [2020-12-23 00:19:44,029 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 558 transitions. Word has length 312 [2020-12-23 00:19:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:44,030 INFO L481 AbstractCegarLoop]: Abstraction has 439 states and 558 transitions. [2020-12-23 00:19:44,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 00:19:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 558 transitions. [2020-12-23 00:19:44,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-12-23 00:19:44,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:44,032 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:44,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 00:19:44,247 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:44,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:44,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1932750348, now seen corresponding path program 36 times [2020-12-23 00:19:44,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:44,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918771751] [2020-12-23 00:19:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6045 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2020-12-23 00:19:45,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918771751] [2020-12-23 00:19:45,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027620967] [2020-12-23 00:19:45,336 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:20:45,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2020-12-23 00:20:45,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:20:46,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 00:20:46,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:20:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6045 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 3744 trivial. 0 not checked. [2020-12-23 00:20:46,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:20:46,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 00:20:46,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98649173] [2020-12-23 00:20:46,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 00:20:46,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:46,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 00:20:46,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:20:46,373 INFO L87 Difference]: Start difference. First operand 439 states and 558 transitions. Second operand 43 states. [2020-12-23 00:20:47,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:47,132 INFO L93 Difference]: Finished difference Result 582 states and 710 transitions. [2020-12-23 00:20:47,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:20:47,133 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 320 [2020-12-23 00:20:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:47,135 INFO L225 Difference]: With dead ends: 582 [2020-12-23 00:20:47,135 INFO L226 Difference]: Without dead ends: 458 [2020-12-23 00:20:47,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:20:47,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-12-23 00:20:47,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 450. [2020-12-23 00:20:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-12-23 00:20:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 572 transitions. [2020-12-23 00:20:47,146 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 572 transitions. Word has length 320 [2020-12-23 00:20:47,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:47,147 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 572 transitions. [2020-12-23 00:20:47,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 00:20:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 572 transitions. [2020-12-23 00:20:47,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-12-23 00:20:47,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:47,149 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:47,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:20:47,363 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:47,364 INFO L82 PathProgramCache]: Analyzing trace with hash -488035550, now seen corresponding path program 37 times [2020-12-23 00:20:47,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:47,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439763907] [2020-12-23 00:20:47,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2020-12-23 00:20:48,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439763907] [2020-12-23 00:20:48,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128040804] [2020-12-23 00:20:48,591 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:20:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:48,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 00:20:48,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:20:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2020-12-23 00:20:49,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:20:49,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 00:20:49,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586953305] [2020-12-23 00:20:49,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 00:20:49,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:49,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 00:20:49,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:20:49,109 INFO L87 Difference]: Start difference. First operand 450 states and 572 transitions. Second operand 44 states. [2020-12-23 00:20:49,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:49,951 INFO L93 Difference]: Finished difference Result 596 states and 727 transitions. [2020-12-23 00:20:49,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 00:20:49,952 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 328 [2020-12-23 00:20:49,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:49,954 INFO L225 Difference]: With dead ends: 596 [2020-12-23 00:20:49,954 INFO L226 Difference]: Without dead ends: 469 [2020-12-23 00:20:49,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:20:49,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-12-23 00:20:49,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 461. [2020-12-23 00:20:49,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2020-12-23 00:20:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 586 transitions. [2020-12-23 00:20:49,963 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 586 transitions. Word has length 328 [2020-12-23 00:20:49,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:49,964 INFO L481 AbstractCegarLoop]: Abstraction has 461 states and 586 transitions. [2020-12-23 00:20:49,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 00:20:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 586 transitions. [2020-12-23 00:20:49,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-12-23 00:20:49,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:49,966 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:50,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:20:50,182 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:50,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:50,183 INFO L82 PathProgramCache]: Analyzing trace with hash 850007628, now seen corresponding path program 38 times [2020-12-23 00:20:50,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:50,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334039782] [2020-12-23 00:20:50,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6683 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2020-12-23 00:20:51,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334039782] [2020-12-23 00:20:51,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658802339] [2020-12-23 00:20:51,481 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:20:51,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:20:51,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:20:51,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 00:20:51,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:20:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6683 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2020-12-23 00:20:52,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:20:52,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 00:20:52,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677245243] [2020-12-23 00:20:52,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 00:20:52,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:52,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 00:20:52,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:20:52,036 INFO L87 Difference]: Start difference. First operand 461 states and 586 transitions. Second operand 45 states. [2020-12-23 00:20:52,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:52,892 INFO L93 Difference]: Finished difference Result 610 states and 744 transitions. [2020-12-23 00:20:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 00:20:52,892 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 336 [2020-12-23 00:20:52,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:52,895 INFO L225 Difference]: With dead ends: 610 [2020-12-23 00:20:52,895 INFO L226 Difference]: Without dead ends: 480 [2020-12-23 00:20:52,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:20:52,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2020-12-23 00:20:52,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 472. [2020-12-23 00:20:52,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2020-12-23 00:20:52,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 600 transitions. [2020-12-23 00:20:52,904 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 600 transitions. Word has length 336 [2020-12-23 00:20:52,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:52,904 INFO L481 AbstractCegarLoop]: Abstraction has 472 states and 600 transitions. [2020-12-23 00:20:52,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 00:20:52,905 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 600 transitions. [2020-12-23 00:20:52,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-12-23 00:20:52,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:52,907 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:53,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 00:20:53,121 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:53,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:53,122 INFO L82 PathProgramCache]: Analyzing trace with hash -47568158, now seen corresponding path program 39 times [2020-12-23 00:20:53,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:53,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239958015] [2020-12-23 00:20:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7014 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2020-12-23 00:20:54,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239958015] [2020-12-23 00:20:54,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785980383] [2020-12-23 00:20:54,359 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true