/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_vararg_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:15:37,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:15:37,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:15:37,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:15:37,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:15:37,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:15:37,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:15:37,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:15:37,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:15:37,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:15:37,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:15:37,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-23 00:15:37,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:15:37,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:15:37,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:15:37,226 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 00:15:37,257 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:15:37,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:15:37,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:15:37,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:15:37,259 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:15:37,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:15:37,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:15:37,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:15:37,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:15:37,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:15:37,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:15:37,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:15:37,261 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:15:37,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:15:37,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:15:37,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:15:37,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:15:37,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:15:37,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:15:37,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:15:37,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:15:37,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:15:37,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:15:37,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:15:37,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:15:37,264 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:15:37,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:15:37,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:15:37,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:15:37,828 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:15:37,828 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:15:37,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_vararg_ground.i [2020-12-23 00:15:37,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4e7cf9b04/e5d48ecd9a144edaa19ed37ab8f6ac8b/FLAG116bfcb26 [2020-12-23 00:15:38,598 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:15:38,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_vararg_ground.i [2020-12-23 00:15:38,606 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4e7cf9b04/e5d48ecd9a144edaa19ed37ab8f6ac8b/FLAG116bfcb26 [2020-12-23 00:15:38,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4e7cf9b04/e5d48ecd9a144edaa19ed37ab8f6ac8b [2020-12-23 00:15:38,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:15:38,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:15:38,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:15:38,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:15:38,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:15:38,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:15:38" (1/1) ... [2020-12-23 00:15:38,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3965afb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:15:38, skipping insertion in model container [2020-12-23 00:15:38,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:15:38" (1/1) ... [2020-12-23 00:15:39,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:15:39,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:15:39,179 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_vararg_ground.i[815,828] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~aa~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:15:39,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:15:39,210 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:15:39,226 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_vararg_ground.i[815,828] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#aa~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#aa~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:15:39,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:15:39,253 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:15:39,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:15:39 WrapperNode [2020-12-23 00:15:39,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:15:39,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:15:39,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:15:39,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:15:39,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:15:39" (1/1) ... [2020-12-23 00:15:39,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:15:39" (1/1) ... [2020-12-23 00:15:39,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:15:39,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:15:39,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:15:39,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:15:39,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:15:39" (1/1) ... [2020-12-23 00:15:39,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:15:39" (1/1) ... [2020-12-23 00:15:39,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:15:39" (1/1) ... [2020-12-23 00:15:39,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:15:39" (1/1) ... [2020-12-23 00:15:39,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:15:39" (1/1) ... [2020-12-23 00:15:39,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:15:39" (1/1) ... [2020-12-23 00:15:39,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:15:39" (1/1) ... [2020-12-23 00:15:39,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:15:39,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:15:39,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:15:39,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:15:39,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:15:39" (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 00:15:39,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:15:39,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:15:39,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:15:39,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:15:39,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:15:39,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:15:39,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:15:39,727 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:15:39,728 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 00:15:39,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:15:39 BoogieIcfgContainer [2020-12-23 00:15:39,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:15:39,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:15:39,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:15:39,736 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:15:39,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:15:38" (1/3) ... [2020-12-23 00:15:39,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2728b2c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:15:39, skipping insertion in model container [2020-12-23 00:15:39,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:15:39" (2/3) ... [2020-12-23 00:15:39,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2728b2c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:15:39, skipping insertion in model container [2020-12-23 00:15:39,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:15:39" (3/3) ... [2020-12-23 00:15:39,741 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_vararg_ground.i [2020-12-23 00:15:39,749 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:15:39,755 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:15:39,811 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:15:39,847 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:15:39,847 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:15:39,848 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:15:39,848 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:15:39,848 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:15:39,848 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:15:39,848 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:15:39,849 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:15:39,869 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-23 00:15:39,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 00:15:39,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:39,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:39,878 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:39,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:39,887 INFO L82 PathProgramCache]: Analyzing trace with hash 221467647, now seen corresponding path program 1 times [2020-12-23 00:15:39,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:39,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624334008] [2020-12-23 00:15:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:40,158 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 00:15:40,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624334008] [2020-12-23 00:15:40,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:15:40,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:15:40,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824851466] [2020-12-23 00:15:40,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:15:40,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:40,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:15:40,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:15:40,187 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-23 00:15:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:40,205 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2020-12-23 00:15:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:15:40,207 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 00:15:40,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:40,218 INFO L225 Difference]: With dead ends: 30 [2020-12-23 00:15:40,218 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 00:15:40,222 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 00:15:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 00:15:40,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 00:15:40,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 00:15:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-23 00:15:40,267 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2020-12-23 00:15:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:40,267 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-23 00:15:40,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:15:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-23 00:15:40,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:15:40,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:40,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:40,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:15:40,269 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:40,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1930623950, now seen corresponding path program 1 times [2020-12-23 00:15:40,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:40,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767351210] [2020-12-23 00:15:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:40,338 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 00:15:40,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767351210] [2020-12-23 00:15:40,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:15:40,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:15:40,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104743550] [2020-12-23 00:15:40,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:15:40,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:40,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:15:40,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:15:40,343 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2020-12-23 00:15:40,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:40,360 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-12-23 00:15:40,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:15:40,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 00:15:40,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:40,362 INFO L225 Difference]: With dead ends: 24 [2020-12-23 00:15:40,362 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 00:15:40,363 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 00:15:40,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 00:15:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-23 00:15:40,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 00:15:40,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-23 00:15:40,368 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2020-12-23 00:15:40,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:40,368 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-23 00:15:40,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:15:40,369 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-23 00:15:40,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:15:40,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:40,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:40,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:15:40,370 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:40,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:40,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1650471280, now seen corresponding path program 1 times [2020-12-23 00:15:40,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:40,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530205503] [2020-12-23 00:15:40,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:15:40,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530205503] [2020-12-23 00:15:40,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552487616] [2020-12-23 00:15:40,420 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 00:15:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:40,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:15:40,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:15:40,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:40,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:15:40,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879052934] [2020-12-23 00:15:40,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:15:40,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:40,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:15:40,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:15:40,560 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2020-12-23 00:15:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:40,582 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-12-23 00:15:40,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:15:40,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 00:15:40,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:40,584 INFO L225 Difference]: With dead ends: 26 [2020-12-23 00:15:40,584 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 00:15:40,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 00:15:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 00:15:40,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-23 00:15:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 00:15:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-23 00:15:40,590 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2020-12-23 00:15:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:40,590 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-23 00:15:40,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:15:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-23 00:15:40,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:15:40,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:40,591 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:40,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:15:40,806 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:40,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1480784082, now seen corresponding path program 2 times [2020-12-23 00:15:40,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:40,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837456833] [2020-12-23 00:15:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:15:40,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837456833] [2020-12-23 00:15:40,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:15:40,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:15:40,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619055186] [2020-12-23 00:15:40,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:15:40,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:40,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:15:40,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:15:40,913 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2020-12-23 00:15:40,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:40,938 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-12-23 00:15:40,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:15:40,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 00:15:40,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:40,940 INFO L225 Difference]: With dead ends: 26 [2020-12-23 00:15:40,940 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 00:15:40,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:15:40,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 00:15:40,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 00:15:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 00:15:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-23 00:15:40,945 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-12-23 00:15:40,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:40,946 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-23 00:15:40,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:15:40,946 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-23 00:15:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:15:40,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:40,947 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:40,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 00:15:40,947 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:40,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:40,952 INFO L82 PathProgramCache]: Analyzing trace with hash 104756627, now seen corresponding path program 1 times [2020-12-23 00:15:40,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:40,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965431370] [2020-12-23 00:15:40,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:15:41,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965431370] [2020-12-23 00:15:41,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511055975] [2020-12-23 00:15:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:15:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:41,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:15:41,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:15:41,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:41,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 00:15:41,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123733873] [2020-12-23 00:15:41,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:15:41,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:41,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:15:41,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:15:41,134 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2020-12-23 00:15:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:41,165 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-23 00:15:41,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:15:41,167 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 00:15:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:41,168 INFO L225 Difference]: With dead ends: 32 [2020-12-23 00:15:41,168 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 00:15:41,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 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 00:15:41,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 00:15:41,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-23 00:15:41,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 00:15:41,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-23 00:15:41,179 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-12-23 00:15:41,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:41,180 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-23 00:15:41,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:15:41,181 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-23 00:15:41,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:15:41,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:41,183 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:41,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:15:41,384 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:41,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:41,386 INFO L82 PathProgramCache]: Analyzing trace with hash 27147345, now seen corresponding path program 2 times [2020-12-23 00:15:41,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:41,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537709060] [2020-12-23 00:15:41,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:15:41,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537709060] [2020-12-23 00:15:41,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672764469] [2020-12-23 00:15:41,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:15:41,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:15:41,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:15:41,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:15:41,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:15:41,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:41,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:15:41,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096038316] [2020-12-23 00:15:41,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:15:41,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:41,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:15:41,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:15:41,667 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2020-12-23 00:15:41,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:41,733 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-12-23 00:15:41,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:15:41,736 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-23 00:15:41,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:41,738 INFO L225 Difference]: With dead ends: 34 [2020-12-23 00:15:41,738 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 00:15:41,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:15:41,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 00:15:41,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-23 00:15:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 00:15:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-23 00:15:41,756 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2020-12-23 00:15:41,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:41,756 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-23 00:15:41,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:15:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-23 00:15:41,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:15:41,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:41,762 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:41,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:15:41,963 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:41,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:41,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1540928625, now seen corresponding path program 3 times [2020-12-23 00:15:41,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:41,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920518464] [2020-12-23 00:15:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:15:42,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920518464] [2020-12-23 00:15:42,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595892657] [2020-12-23 00:15:42,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:15:42,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:15:42,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:15:42,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:15:42,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:42,290 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:15:42,297 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:15:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 00:15:42,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:42,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-23 00:15:42,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282090605] [2020-12-23 00:15:42,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:15:42,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:42,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:15:42,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:15:42,318 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 12 states. [2020-12-23 00:15:42,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:42,499 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-12-23 00:15:42,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:15:42,500 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-12-23 00:15:42,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:42,501 INFO L225 Difference]: With dead ends: 41 [2020-12-23 00:15:42,501 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 00:15:42,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:15:42,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 00:15:42,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-12-23 00:15:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 00:15:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-23 00:15:42,509 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2020-12-23 00:15:42,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:42,509 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-23 00:15:42,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:15:42,510 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-23 00:15:42,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 00:15:42,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:42,511 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:42,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:15:42,715 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:42,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:42,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1890442429, now seen corresponding path program 1 times [2020-12-23 00:15:42,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:42,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567251293] [2020-12-23 00:15:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:15:42,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567251293] [2020-12-23 00:15:42,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556563565] [2020-12-23 00:15:42,810 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 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 00:15:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:42,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:15:42,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:15:42,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:42,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 00:15:42,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643111437] [2020-12-23 00:15:42,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:15:42,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:42,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:15:42,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:15:42,944 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 9 states. [2020-12-23 00:15:42,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:42,990 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-12-23 00:15:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:15:42,991 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-12-23 00:15:42,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:42,992 INFO L225 Difference]: With dead ends: 42 [2020-12-23 00:15:42,992 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 00:15:42,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 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 00:15:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 00:15:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-23 00:15:42,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 00:15:42,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-23 00:15:42,998 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2020-12-23 00:15:42,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:42,999 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-23 00:15:42,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:15:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-23 00:15:43,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:15:43,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:43,000 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:43,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:15:43,214 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:43,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:43,216 INFO L82 PathProgramCache]: Analyzing trace with hash -2081483647, now seen corresponding path program 2 times [2020-12-23 00:15:43,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:43,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938115362] [2020-12-23 00:15:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:15:43,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938115362] [2020-12-23 00:15:43,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207930826] [2020-12-23 00:15:43,348 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 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 00:15:43,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:15:43,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:15:43,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:15:43,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:15:43,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:43,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:15:43,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69345017] [2020-12-23 00:15:43,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:15:43,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:43,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:15:43,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:15:43,477 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2020-12-23 00:15:43,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:43,514 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-12-23 00:15:43,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:15:43,515 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-12-23 00:15:43,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:43,516 INFO L225 Difference]: With dead ends: 44 [2020-12-23 00:15:43,516 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 00:15:43,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 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 00:15:43,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 00:15:43,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-23 00:15:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:15:43,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-23 00:15:43,522 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2020-12-23 00:15:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:43,523 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-23 00:15:43,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:15:43,523 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-23 00:15:43,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:15:43,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:43,524 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:43,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:15:43,736 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:43,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:43,737 INFO L82 PathProgramCache]: Analyzing trace with hash -988500417, now seen corresponding path program 3 times [2020-12-23 00:15:43,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:43,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771817209] [2020-12-23 00:15:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:15:43,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771817209] [2020-12-23 00:15:43,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437012078] [2020-12-23 00:15:43,859 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 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 00:15:43,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:15:43,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:15:43,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:15:43,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 00:15:44,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:44,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2020-12-23 00:15:44,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639536716] [2020-12-23 00:15:44,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:15:44,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:44,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:15:44,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:15:44,044 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 14 states. [2020-12-23 00:15:44,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:44,233 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-12-23 00:15:44,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:15:44,234 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-12-23 00:15:44,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:44,234 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:15:44,235 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 00:15:44,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:15:44,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 00:15:44,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-23 00:15:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:15:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-23 00:15:44,241 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2020-12-23 00:15:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:44,241 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-23 00:15:44,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:15:44,241 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-23 00:15:44,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 00:15:44,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:44,242 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:44,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:15:44,455 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:44,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:44,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1374384674, now seen corresponding path program 4 times [2020-12-23 00:15:44,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:44,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328774454] [2020-12-23 00:15:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 00:15:44,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328774454] [2020-12-23 00:15:44,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247193056] [2020-12-23 00:15:44,600 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 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 00:15:44,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:15:44,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:15:44,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:15:44,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 00:15:44,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:44,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:15:44,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721937383] [2020-12-23 00:15:44,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:15:44,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:44,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:15:44,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:15:44,730 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 12 states. [2020-12-23 00:15:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:44,773 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-12-23 00:15:44,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:15:44,777 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-12-23 00:15:44,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:44,778 INFO L225 Difference]: With dead ends: 52 [2020-12-23 00:15:44,778 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 00:15:44,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 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 00:15:44,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 00:15:44,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-23 00:15:44,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 00:15:44,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-23 00:15:44,784 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2020-12-23 00:15:44,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:44,784 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-23 00:15:44,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:15:44,785 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-23 00:15:44,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:15:44,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:44,786 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:44,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:15:45,000 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:45,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:45,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1067074912, now seen corresponding path program 5 times [2020-12-23 00:15:45,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:45,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122461232] [2020-12-23 00:15:45,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 00:15:45,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122461232] [2020-12-23 00:15:45,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842733899] [2020-12-23 00:15:45,165 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 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 00:15:45,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 00:15:45,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:15:45,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:15:45,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 00:15:45,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:45,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:15:45,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028157270] [2020-12-23 00:15:45,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:15:45,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:45,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:15:45,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:15:45,364 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 13 states. [2020-12-23 00:15:45,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:45,420 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-12-23 00:15:45,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:15:45,420 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-12-23 00:15:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:45,421 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:15:45,421 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 00:15:45,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 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 00:15:45,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 00:15:45,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-12-23 00:15:45,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 00:15:45,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-23 00:15:45,432 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2020-12-23 00:15:45,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:45,434 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-23 00:15:45,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:15:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-23 00:15:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 00:15:45,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:45,442 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:45,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:15:45,656 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:45,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:45,658 INFO L82 PathProgramCache]: Analyzing trace with hash 2095137054, now seen corresponding path program 6 times [2020-12-23 00:15:45,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:45,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290962203] [2020-12-23 00:15:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 00:15:45,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290962203] [2020-12-23 00:15:45,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333814238] [2020-12-23 00:15:45,817 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 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 00:15:45,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:15:45,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:15:45,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:15:45,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:46,119 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:15:46,124 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:15:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:15:46,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:46,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2020-12-23 00:15:46,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477285189] [2020-12-23 00:15:46,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:15:46,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:46,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:15:46,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:15:46,151 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 21 states. [2020-12-23 00:15:46,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:46,601 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-12-23 00:15:46,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:15:46,601 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-12-23 00:15:46,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:46,604 INFO L225 Difference]: With dead ends: 63 [2020-12-23 00:15:46,604 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 00:15:46,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=987, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:15:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 00:15:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-12-23 00:15:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 00:15:46,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-23 00:15:46,624 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-12-23 00:15:46,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:46,624 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-23 00:15:46,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:15:46,624 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-23 00:15:46,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 00:15:46,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:46,625 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:46,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:15:46,840 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:46,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:46,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1923302866, now seen corresponding path program 7 times [2020-12-23 00:15:46,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:46,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269646266] [2020-12-23 00:15:46,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 00:15:47,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269646266] [2020-12-23 00:15:47,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901242120] [2020-12-23 00:15:47,021 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 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 00:15:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:47,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:15:47,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 00:15:47,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:47,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 00:15:47,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727138037] [2020-12-23 00:15:47,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:15:47,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:47,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:15:47,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:15:47,173 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 15 states. [2020-12-23 00:15:47,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:47,226 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-12-23 00:15:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:15:47,227 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-12-23 00:15:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:47,227 INFO L225 Difference]: With dead ends: 66 [2020-12-23 00:15:47,228 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 00:15:47,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:15:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 00:15:47,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-12-23 00:15:47,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:15:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-23 00:15:47,234 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2020-12-23 00:15:47,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:47,234 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-23 00:15:47,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:15:47,235 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-23 00:15:47,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:15:47,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:47,235 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:47,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:15:47,450 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:47,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:47,451 INFO L82 PathProgramCache]: Analyzing trace with hash 763995024, now seen corresponding path program 8 times [2020-12-23 00:15:47,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:47,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144611863] [2020-12-23 00:15:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 00:15:47,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144611863] [2020-12-23 00:15:47,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648150655] [2020-12-23 00:15:47,606 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 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 00:15:47,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:15:47,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:15:47,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:15:47,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 00:15:47,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:47,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 00:15:47,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889028893] [2020-12-23 00:15:47,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:15:47,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:47,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:15:47,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:15:47,752 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2020-12-23 00:15:47,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:47,812 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-12-23 00:15:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:15:47,814 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-12-23 00:15:47,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:47,816 INFO L225 Difference]: With dead ends: 68 [2020-12-23 00:15:47,816 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 00:15:47,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 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 00:15:47,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 00:15:47,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-23 00:15:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:15:47,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-23 00:15:47,828 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2020-12-23 00:15:47,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:47,828 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-23 00:15:47,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:15:47,828 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-23 00:15:47,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 00:15:47,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:47,831 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:48,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:15:48,037 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:48,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:48,038 INFO L82 PathProgramCache]: Analyzing trace with hash -934311474, now seen corresponding path program 9 times [2020-12-23 00:15:48,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:48,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163635450] [2020-12-23 00:15:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 00:15:48,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163635450] [2020-12-23 00:15:48,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192618141] [2020-12-23 00:15:48,255 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 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 00:15:48,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:15:48,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:15:48,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:15:48,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 00:15:48,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:48,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2020-12-23 00:15:48,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726549034] [2020-12-23 00:15:48,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:15:48,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:48,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:15:48,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:15:48,479 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 22 states. [2020-12-23 00:15:48,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:48,850 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-12-23 00:15:48,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:15:48,853 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2020-12-23 00:15:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:48,853 INFO L225 Difference]: With dead ends: 82 [2020-12-23 00:15:48,853 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 00:15:48,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=407, Invalid=853, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:15:48,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 00:15:48,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-23 00:15:48,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 00:15:48,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-12-23 00:15:48,862 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2020-12-23 00:15:48,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:48,862 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-12-23 00:15:48,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:15:48,862 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-12-23 00:15:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 00:15:48,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:48,863 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:49,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:15:49,074 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:49,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:49,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1021476209, now seen corresponding path program 10 times [2020-12-23 00:15:49,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:49,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277881672] [2020-12-23 00:15:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 00:15:49,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277881672] [2020-12-23 00:15:49,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289598978] [2020-12-23 00:15:49,303 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 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 00:15:49,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:15:49,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:15:49,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:15:49,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 00:15:49,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:49,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 00:15:49,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053026804] [2020-12-23 00:15:49,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:15:49,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:49,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:15:49,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:15:49,531 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 18 states. [2020-12-23 00:15:49,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:49,608 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2020-12-23 00:15:49,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:15:49,609 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-12-23 00:15:49,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:49,610 INFO L225 Difference]: With dead ends: 76 [2020-12-23 00:15:49,610 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 00:15:49,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 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 00:15:49,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 00:15:49,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-23 00:15:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 00:15:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-23 00:15:49,636 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2020-12-23 00:15:49,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:49,636 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-23 00:15:49,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:15:49,636 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-23 00:15:49,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 00:15:49,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:49,637 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:49,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:15:49,838 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:49,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:49,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1729741521, now seen corresponding path program 11 times [2020-12-23 00:15:49,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:49,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506175049] [2020-12-23 00:15:49,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 00:15:50,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506175049] [2020-12-23 00:15:50,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452264328] [2020-12-23 00:15:50,114 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 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 00:15:50,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-23 00:15:50,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:15:50,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:15:50,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 00:15:50,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:50,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 00:15:50,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62755529] [2020-12-23 00:15:50,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:15:50,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:50,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:15:50,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:15:50,490 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 19 states. [2020-12-23 00:15:50,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:50,555 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-12-23 00:15:50,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:15:50,556 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2020-12-23 00:15:50,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:50,556 INFO L225 Difference]: With dead ends: 78 [2020-12-23 00:15:50,556 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 00:15:50,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 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 00:15:50,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 00:15:50,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-12-23 00:15:50,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 00:15:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-12-23 00:15:50,566 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2020-12-23 00:15:50,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:50,566 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-12-23 00:15:50,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:15:50,567 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-12-23 00:15:50,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 00:15:50,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:50,567 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:50,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:15:50,783 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:50,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:50,784 INFO L82 PathProgramCache]: Analyzing trace with hash 49874285, now seen corresponding path program 12 times [2020-12-23 00:15:50,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:50,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838311173] [2020-12-23 00:15:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 00:15:51,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838311173] [2020-12-23 00:15:51,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953768791] [2020-12-23 00:15:51,051 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 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 00:15:51,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:15:51,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:15:51,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 00:15:51,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:51,175 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 5 treesize of output 3 [2020-12-23 00:15:51,176 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:15:51,179 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:15:51,180 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:15:51,180 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:9, output treesize:3 [2020-12-23 00:15:51,462 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:15:51,467 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:15:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 00:15:51,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:51,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2020-12-23 00:15:51,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584411860] [2020-12-23 00:15:51,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:15:51,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:51,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:15:51,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:15:51,501 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 29 states. [2020-12-23 00:15:52,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:52,334 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2020-12-23 00:15:52,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:15:52,334 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 55 [2020-12-23 00:15:52,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:52,335 INFO L225 Difference]: With dead ends: 87 [2020-12-23 00:15:52,335 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 00:15:52,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=1987, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 00:15:52,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 00:15:52,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-12-23 00:15:52,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 00:15:52,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-12-23 00:15:52,342 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 55 [2020-12-23 00:15:52,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:52,342 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-12-23 00:15:52,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:15:52,342 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-12-23 00:15:52,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 00:15:52,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:52,343 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:52,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:15:52,558 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:52,559 INFO L82 PathProgramCache]: Analyzing trace with hash -160254175, now seen corresponding path program 13 times [2020-12-23 00:15:52,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:52,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922869885] [2020-12-23 00:15:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 00:15:52,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922869885] [2020-12-23 00:15:52,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821452686] [2020-12-23 00:15:52,897 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 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 00:15:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:52,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:15:52,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 00:15:53,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:53,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 00:15:53,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794163450] [2020-12-23 00:15:53,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:15:53,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:53,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:15:53,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:15:53,097 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 21 states. [2020-12-23 00:15:53,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:53,169 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-12-23 00:15:53,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:15:53,169 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-12-23 00:15:53,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:53,170 INFO L225 Difference]: With dead ends: 90 [2020-12-23 00:15:53,170 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 00:15:53,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:15:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 00:15:53,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-12-23 00:15:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 00:15:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-12-23 00:15:53,175 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2020-12-23 00:15:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:53,175 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-12-23 00:15:53,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:15:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-12-23 00:15:53,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:15:53,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:53,176 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:53,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:15:53,390 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:53,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:53,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1915723425, now seen corresponding path program 14 times [2020-12-23 00:15:53,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:53,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786431919] [2020-12-23 00:15:53,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 00:15:53,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786431919] [2020-12-23 00:15:53,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824976106] [2020-12-23 00:15:53,691 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 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 00:15:53,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:15:53,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:15:53,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:15:53,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 00:15:53,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:53,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 00:15:53,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660886806] [2020-12-23 00:15:53,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:15:53,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:53,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:15:53,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:15:53,855 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 22 states. [2020-12-23 00:15:53,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:53,931 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2020-12-23 00:15:53,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:15:53,932 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-12-23 00:15:53,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:53,947 INFO L225 Difference]: With dead ends: 92 [2020-12-23 00:15:53,947 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 00:15:53,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 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 00:15:53,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 00:15:53,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-12-23 00:15:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 00:15:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-12-23 00:15:53,951 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2020-12-23 00:15:53,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:53,951 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-12-23 00:15:53,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:15:53,951 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-12-23 00:15:53,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 00:15:53,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:53,952 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:54,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 00:15:54,164 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:54,165 INFO L82 PathProgramCache]: Analyzing trace with hash -999525347, now seen corresponding path program 15 times [2020-12-23 00:15:54,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:54,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731980462] [2020-12-23 00:15:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 00:15:54,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731980462] [2020-12-23 00:15:54,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24800766] [2020-12-23 00:15:54,468 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 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 00:15:54,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:15:54,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:15:54,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:15:54,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-12-23 00:15:54,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:54,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 30 [2020-12-23 00:15:54,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899278212] [2020-12-23 00:15:54,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 00:15:54,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:54,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 00:15:54,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=607, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:15:54,755 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 30 states. [2020-12-23 00:15:55,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:55,346 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2020-12-23 00:15:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:15:55,346 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 65 [2020-12-23 00:15:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:55,347 INFO L225 Difference]: With dead ends: 110 [2020-12-23 00:15:55,347 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 00:15:55,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=783, Invalid=1667, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 00:15:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 00:15:55,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-23 00:15:55,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 00:15:55,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-12-23 00:15:55,353 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2020-12-23 00:15:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:55,354 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-12-23 00:15:55,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 00:15:55,354 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-12-23 00:15:55,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:15:55,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:55,355 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:55,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:15:55,569 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:55,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:55,570 INFO L82 PathProgramCache]: Analyzing trace with hash 844842880, now seen corresponding path program 16 times [2020-12-23 00:15:55,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:55,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517128460] [2020-12-23 00:15:55,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 00:15:55,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517128460] [2020-12-23 00:15:55,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686491839] [2020-12-23 00:15:55,910 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 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 00:15:55,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:15:55,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:15:55,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 00:15:55,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 00:15:56,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:56,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 00:15:56,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13123208] [2020-12-23 00:15:56,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 00:15:56,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:56,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 00:15:56,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:15:56,105 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 24 states. [2020-12-23 00:15:56,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:56,193 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2020-12-23 00:15:56,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 00:15:56,194 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-12-23 00:15:56,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:56,194 INFO L225 Difference]: With dead ends: 100 [2020-12-23 00:15:56,195 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 00:15:56,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 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 00:15:56,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 00:15:56,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-12-23 00:15:56,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 00:15:56,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-12-23 00:15:56,200 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2020-12-23 00:15:56,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:56,200 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-12-23 00:15:56,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 00:15:56,200 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-12-23 00:15:56,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 00:15:56,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:56,201 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:56,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:15:56,415 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:56,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:56,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1996608446, now seen corresponding path program 17 times [2020-12-23 00:15:56,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:56,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985277663] [2020-12-23 00:15:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 00:15:56,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985277663] [2020-12-23 00:15:56,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804710384] [2020-12-23 00:15:56,766 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 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 00:15:57,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-12-23 00:15:57,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:15:57,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:15:57,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 00:15:57,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:57,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 00:15:57,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899267179] [2020-12-23 00:15:57,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 00:15:57,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:57,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 00:15:57,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:15:57,416 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 25 states. [2020-12-23 00:15:57,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:15:57,502 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2020-12-23 00:15:57,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:15:57,502 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 71 [2020-12-23 00:15:57,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:15:57,503 INFO L225 Difference]: With dead ends: 102 [2020-12-23 00:15:57,503 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 00:15:57,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:15:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 00:15:57,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-23 00:15:57,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 00:15:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-12-23 00:15:57,508 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2020-12-23 00:15:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:15:57,508 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-12-23 00:15:57,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 00:15:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-12-23 00:15:57,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 00:15:57,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:15:57,509 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:15:57,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 00:15:57,723 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:15:57,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:15:57,724 INFO L82 PathProgramCache]: Analyzing trace with hash 741755004, now seen corresponding path program 18 times [2020-12-23 00:15:57,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:15:57,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633579953] [2020-12-23 00:15:57,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:15:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:15:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 00:15:58,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633579953] [2020-12-23 00:15:58,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033151041] [2020-12-23 00:15:58,166 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 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 00:15:58,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:15:58,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:15:58,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:15:58,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:15:58,865 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:15:58,875 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:15:58,877 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:15:58,881 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:15:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-23 00:15:58,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:15:58,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14] total 37 [2020-12-23 00:15:58,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742905236] [2020-12-23 00:15:58,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:15:58,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:15:58,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:15:58,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:15:58,954 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2020-12-23 00:16:01,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:01,112 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2020-12-23 00:16:01,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:16:01,113 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2020-12-23 00:16:01,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:01,114 INFO L225 Difference]: With dead ends: 123 [2020-12-23 00:16:01,114 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 00:16:01,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1117, Invalid=4139, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 00:16:01,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 00:16:01,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-12-23 00:16:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 00:16:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-12-23 00:16:01,123 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2020-12-23 00:16:01,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:01,123 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-12-23 00:16:01,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:16:01,124 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-12-23 00:16:01,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 00:16:01,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:01,124 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:01,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:16:01,338 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:01,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:01,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1499930081, now seen corresponding path program 19 times [2020-12-23 00:16:01,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:01,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051130031] [2020-12-23 00:16:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-23 00:16:01,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051130031] [2020-12-23 00:16:01,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424053785] [2020-12-23 00:16:01,753 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 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 00:16:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:01,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 00:16:01,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-23 00:16:01,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:01,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 00:16:01,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361579906] [2020-12-23 00:16:01,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 00:16:01,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:01,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 00:16:01,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:16:01,935 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 27 states. [2020-12-23 00:16:02,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:02,041 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2020-12-23 00:16:02,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:16:02,042 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-12-23 00:16:02,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:02,042 INFO L225 Difference]: With dead ends: 110 [2020-12-23 00:16:02,043 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 00:16:02,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 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 00:16:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 00:16:02,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-12-23 00:16:02,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 00:16:02,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-12-23 00:16:02,047 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2020-12-23 00:16:02,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:02,048 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-12-23 00:16:02,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 00:16:02,048 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-12-23 00:16:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 00:16:02,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:02,049 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:02,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 00:16:02,264 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:02,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:02,265 INFO L82 PathProgramCache]: Analyzing trace with hash 981880925, now seen corresponding path program 20 times [2020-12-23 00:16:02,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:02,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008390855] [2020-12-23 00:16:02,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-23 00:16:02,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008390855] [2020-12-23 00:16:02,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395035710] [2020-12-23 00:16:02,802 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 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 00:16:02,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:16:02,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:16:02,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:16:02,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-23 00:16:02,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:02,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 00:16:02,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117321519] [2020-12-23 00:16:02,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:16:02,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:02,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:16:02,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:16:02,997 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 28 states. [2020-12-23 00:16:03,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:03,113 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2020-12-23 00:16:03,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:16:03,113 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-12-23 00:16:03,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:03,114 INFO L225 Difference]: With dead ends: 112 [2020-12-23 00:16:03,114 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 00:16:03,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:16:03,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 00:16:03,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-12-23 00:16:03,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 00:16:03,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-12-23 00:16:03,120 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2020-12-23 00:16:03,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:03,120 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-12-23 00:16:03,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:16:03,120 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-12-23 00:16:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 00:16:03,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:03,121 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:03,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:16:03,335 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:03,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:03,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1999558885, now seen corresponding path program 21 times [2020-12-23 00:16:03,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:03,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17337738] [2020-12-23 00:16:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-23 00:16:03,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17337738] [2020-12-23 00:16:03,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431911142] [2020-12-23 00:16:03,843 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 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 00:16:03,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:16:03,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:16:03,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 00:16:03,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:04,376 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:16:04,379 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:16:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2020-12-23 00:16:04,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:04,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 14] total 40 [2020-12-23 00:16:04,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56927843] [2020-12-23 00:16:04,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:16:04,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:04,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:16:04,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:16:04,426 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 40 states. [2020-12-23 00:16:05,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:05,881 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2020-12-23 00:16:05,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 00:16:05,881 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 81 [2020-12-23 00:16:05,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:05,882 INFO L225 Difference]: With dead ends: 121 [2020-12-23 00:16:05,882 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 00:16:05,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1189, Invalid=3781, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 00:16:05,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 00:16:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2020-12-23 00:16:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 00:16:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-12-23 00:16:05,890 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 81 [2020-12-23 00:16:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:05,890 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-12-23 00:16:05,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:16:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-12-23 00:16:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 00:16:05,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:05,891 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:06,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:16:06,107 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:06,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:06,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1887862705, now seen corresponding path program 22 times [2020-12-23 00:16:06,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:06,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770181825] [2020-12-23 00:16:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-23 00:16:06,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770181825] [2020-12-23 00:16:06,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715319605] [2020-12-23 00:16:06,621 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 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 00:16:06,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:16:06,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:16:06,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 00:16:06,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-23 00:16:06,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:06,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 00:16:06,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478285754] [2020-12-23 00:16:06,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 00:16:06,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:06,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 00:16:06,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:16:06,906 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 30 states. [2020-12-23 00:16:07,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:07,020 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2020-12-23 00:16:07,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 00:16:07,022 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 87 [2020-12-23 00:16:07,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:07,023 INFO L225 Difference]: With dead ends: 124 [2020-12-23 00:16:07,023 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 00:16:07,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 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 00:16:07,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 00:16:07,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-12-23 00:16:07,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 00:16:07,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-12-23 00:16:07,030 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2020-12-23 00:16:07,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:07,031 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-12-23 00:16:07,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 00:16:07,031 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-12-23 00:16:07,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:16:07,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:07,032 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:07,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:16:07,246 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:07,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:07,247 INFO L82 PathProgramCache]: Analyzing trace with hash 861452557, now seen corresponding path program 23 times [2020-12-23 00:16:07,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:07,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284926549] [2020-12-23 00:16:07,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:07,820 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-23 00:16:07,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284926549] [2020-12-23 00:16:07,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801615404] [2020-12-23 00:16:07,820 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 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 00:16:08,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2020-12-23 00:16:08,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:16:08,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 00:16:08,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-23 00:16:09,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:09,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 00:16:09,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851610554] [2020-12-23 00:16:09,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:16:09,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:09,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:16:09,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:16:09,046 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 31 states. [2020-12-23 00:16:09,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:09,172 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2020-12-23 00:16:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:16:09,174 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 89 [2020-12-23 00:16:09,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:09,175 INFO L225 Difference]: With dead ends: 126 [2020-12-23 00:16:09,175 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 00:16:09,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:16:09,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 00:16:09,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-23 00:16:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 00:16:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-12-23 00:16:09,181 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2020-12-23 00:16:09,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:09,181 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-12-23 00:16:09,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:16:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-12-23 00:16:09,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 00:16:09,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:09,183 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:09,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:16:09,398 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:09,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:09,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1548532299, now seen corresponding path program 24 times [2020-12-23 00:16:09,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:09,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032774963] [2020-12-23 00:16:09,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-23 00:16:10,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032774963] [2020-12-23 00:16:10,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861510393] [2020-12-23 00:16:10,053 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 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 00:16:10,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 00:16:10,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:16:10,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 00:16:10,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:10,210 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 5 treesize of output 3 [2020-12-23 00:16:10,212 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:16:10,214 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:16:10,215 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:16:10,215 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:9, output treesize:3 [2020-12-23 00:16:10,814 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:16:10,816 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:16:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-12-23 00:16:10,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:10,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 16] total 45 [2020-12-23 00:16:10,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697493885] [2020-12-23 00:16:10,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 00:16:10,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:10,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 00:16:10,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1480, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:16:10,871 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 45 states. [2020-12-23 00:16:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:12,741 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2020-12-23 00:16:12,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 00:16:12,742 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 91 [2020-12-23 00:16:12,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:12,743 INFO L225 Difference]: With dead ends: 135 [2020-12-23 00:16:12,743 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 00:16:12,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1455, Invalid=4707, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 00:16:12,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 00:16:12,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2020-12-23 00:16:12,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 00:16:12,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-12-23 00:16:12,751 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 91 [2020-12-23 00:16:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:12,751 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-12-23 00:16:12,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 00:16:12,752 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-12-23 00:16:12,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 00:16:12,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:12,753 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:12,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:16:12,967 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:12,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:12,967 INFO L82 PathProgramCache]: Analyzing trace with hash -128498177, now seen corresponding path program 25 times [2020-12-23 00:16:12,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:12,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466408372] [2020-12-23 00:16:12,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-23 00:16:13,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466408372] [2020-12-23 00:16:13,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675113982] [2020-12-23 00:16:13,635 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 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 00:16:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:13,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 00:16:13,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-23 00:16:13,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:13,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 00:16:13,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832492023] [2020-12-23 00:16:13,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 00:16:13,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:13,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 00:16:13,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:16:13,851 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 33 states. [2020-12-23 00:16:13,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:13,971 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2020-12-23 00:16:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:16:13,972 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2020-12-23 00:16:13,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:13,973 INFO L225 Difference]: With dead ends: 138 [2020-12-23 00:16:13,973 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 00:16:13,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:16:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 00:16:13,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-12-23 00:16:13,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 00:16:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-12-23 00:16:13,980 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2020-12-23 00:16:13,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:13,980 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-12-23 00:16:13,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 00:16:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-12-23 00:16:13,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 00:16:13,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:13,981 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:14,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 00:16:14,194 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:14,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:14,195 INFO L82 PathProgramCache]: Analyzing trace with hash 441264445, now seen corresponding path program 26 times [2020-12-23 00:16:14,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:14,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902726217] [2020-12-23 00:16:14,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-23 00:16:14,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902726217] [2020-12-23 00:16:14,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773681365] [2020-12-23 00:16:14,869 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 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 00:16:14,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:16:14,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:16:14,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 00:16:14,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-23 00:16:15,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:15,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 00:16:15,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006931655] [2020-12-23 00:16:15,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:16:15,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:15,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:16:15,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:16:15,082 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 34 states. [2020-12-23 00:16:15,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:15,220 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2020-12-23 00:16:15,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 00:16:15,221 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 99 [2020-12-23 00:16:15,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:15,223 INFO L225 Difference]: With dead ends: 140 [2020-12-23 00:16:15,223 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 00:16:15,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:16:15,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 00:16:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-12-23 00:16:15,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 00:16:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-12-23 00:16:15,229 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2020-12-23 00:16:15,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:15,229 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-12-23 00:16:15,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:16:15,229 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-12-23 00:16:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 00:16:15,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:15,231 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:15,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:16:15,440 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:15,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:15,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1772669701, now seen corresponding path program 27 times [2020-12-23 00:16:15,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:15,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209145998] [2020-12-23 00:16:15,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-23 00:16:16,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209145998] [2020-12-23 00:16:16,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729416328] [2020-12-23 00:16:16,125 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 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 00:16:16,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:16:16,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:16:16,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:16:16,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 50 proven. 30 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-12-23 00:16:16,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:16,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 14] total 46 [2020-12-23 00:16:16,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057960524] [2020-12-23 00:16:16,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 00:16:16,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:16,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 00:16:16,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=1449, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 00:16:16,681 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 46 states. [2020-12-23 00:16:18,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:18,085 INFO L93 Difference]: Finished difference Result 166 states and 171 transitions. [2020-12-23 00:16:18,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 00:16:18,089 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 101 [2020-12-23 00:16:18,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:18,090 INFO L225 Difference]: With dead ends: 166 [2020-12-23 00:16:18,091 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 00:16:18,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1901, Invalid=4105, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 00:16:18,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 00:16:18,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-12-23 00:16:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 00:16:18,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-12-23 00:16:18,098 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2020-12-23 00:16:18,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:18,098 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-12-23 00:16:18,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 00:16:18,098 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-12-23 00:16:18,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-23 00:16:18,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:18,099 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:18,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 00:16:18,315 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:18,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:18,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1773348898, now seen corresponding path program 28 times [2020-12-23 00:16:18,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:18,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052485811] [2020-12-23 00:16:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1116 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:16:19,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052485811] [2020-12-23 00:16:19,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060359514] [2020-12-23 00:16:19,056 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 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 00:16:19,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:16:19,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:16:19,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 00:16:19,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1116 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:16:19,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:19,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 00:16:19,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687137572] [2020-12-23 00:16:19,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 00:16:19,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:19,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 00:16:19,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:16:19,381 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 36 states. [2020-12-23 00:16:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:19,530 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2020-12-23 00:16:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 00:16:19,531 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 105 [2020-12-23 00:16:19,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:19,532 INFO L225 Difference]: With dead ends: 148 [2020-12-23 00:16:19,533 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 00:16:19,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 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 00:16:19,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 00:16:19,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-12-23 00:16:19,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 00:16:19,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-12-23 00:16:19,555 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2020-12-23 00:16:19,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:19,556 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-12-23 00:16:19,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 00:16:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-12-23 00:16:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 00:16:19,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:19,557 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:19,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 00:16:19,771 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:19,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:19,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1975345892, now seen corresponding path program 29 times [2020-12-23 00:16:19,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:19,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162245078] [2020-12-23 00:16:19,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:16:20,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162245078] [2020-12-23 00:16:20,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391510735] [2020-12-23 00:16:20,636 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 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 00:16:27,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-12-23 00:16:27,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:16:27,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 00:16:27,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:16:28,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:28,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 00:16:28,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917138497] [2020-12-23 00:16:28,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:16:28,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:28,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:16:28,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:16:28,037 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 37 states. [2020-12-23 00:16:28,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:28,170 INFO L93 Difference]: Finished difference Result 150 states and 154 transitions. [2020-12-23 00:16:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 00:16:28,171 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 107 [2020-12-23 00:16:28,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:28,172 INFO L225 Difference]: With dead ends: 150 [2020-12-23 00:16:28,172 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 00:16:28,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:16:28,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 00:16:28,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-12-23 00:16:28,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 00:16:28,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-12-23 00:16:28,178 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2020-12-23 00:16:28,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:28,179 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-12-23 00:16:28,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:16:28,179 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-12-23 00:16:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-23 00:16:28,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:28,180 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:28,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 00:16:28,394 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:28,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:28,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1474038490, now seen corresponding path program 30 times [2020-12-23 00:16:28,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:28,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204521736] [2020-12-23 00:16:28,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:16:29,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204521736] [2020-12-23 00:16:29,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890795932] [2020-12-23 00:16:29,294 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 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 00:16:29,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 00:16:29,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:16:29,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 00:16:29,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:29,713 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 00:16:29,714 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:16:29,719 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:16:29,721 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:16:29,721 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2020-12-23 00:16:30,309 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:16:30,311 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:16:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-12-23 00:16:30,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:30,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 18] total 53 [2020-12-23 00:16:30,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203576982] [2020-12-23 00:16:30,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 00:16:30,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:30,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 00:16:30,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=2050, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 00:16:30,381 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 53 states. [2020-12-23 00:16:32,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:33,000 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2020-12-23 00:16:33,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 00:16:33,001 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 109 [2020-12-23 00:16:33,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:33,002 INFO L225 Difference]: With dead ends: 159 [2020-12-23 00:16:33,002 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 00:16:33,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2063, Invalid=6493, Unknown=0, NotChecked=0, Total=8556 [2020-12-23 00:16:33,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 00:16:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2020-12-23 00:16:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 00:16:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2020-12-23 00:16:33,011 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 109 [2020-12-23 00:16:33,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:33,011 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2020-12-23 00:16:33,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 00:16:33,011 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2020-12-23 00:16:33,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-23 00:16:33,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:33,012 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:33,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 00:16:33,227 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:33,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:33,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1822409614, now seen corresponding path program 31 times [2020-12-23 00:16:33,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:33,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465970731] [2020-12-23 00:16:33,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-23 00:16:34,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465970731] [2020-12-23 00:16:34,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709639309] [2020-12-23 00:16:34,160 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 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 00:16:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:34,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 00:16:34,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-23 00:16:34,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:34,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 00:16:34,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484111033] [2020-12-23 00:16:34,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 00:16:34,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:34,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 00:16:34,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:16:34,406 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 39 states. [2020-12-23 00:16:34,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:34,552 INFO L93 Difference]: Finished difference Result 162 states and 166 transitions. [2020-12-23 00:16:34,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 00:16:34,553 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-12-23 00:16:34,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:34,554 INFO L225 Difference]: With dead ends: 162 [2020-12-23 00:16:34,554 INFO L226 Difference]: Without dead ends: 119 [2020-12-23 00:16:34,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:16:34,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-23 00:16:34,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-12-23 00:16:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 00:16:34,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-12-23 00:16:34,560 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2020-12-23 00:16:34,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:34,561 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-12-23 00:16:34,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 00:16:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-12-23 00:16:34,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-23 00:16:34,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:34,562 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:34,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 00:16:34,774 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:34,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:34,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1085893812, now seen corresponding path program 32 times [2020-12-23 00:16:34,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:34,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737711870] [2020-12-23 00:16:34,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-23 00:16:35,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737711870] [2020-12-23 00:16:35,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486964995] [2020-12-23 00:16:35,763 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 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 00:16:35,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:16:35,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:16:35,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 00:16:35,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-23 00:16:36,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:36,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 00:16:36,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346542342] [2020-12-23 00:16:36,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:16:36,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:36,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:16:36,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:16:36,014 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 40 states. [2020-12-23 00:16:36,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:36,157 INFO L93 Difference]: Finished difference Result 164 states and 168 transitions. [2020-12-23 00:16:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 00:16:36,165 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 117 [2020-12-23 00:16:36,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:36,166 INFO L225 Difference]: With dead ends: 164 [2020-12-23 00:16:36,166 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 00:16:36,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:16:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 00:16:36,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-12-23 00:16:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 00:16:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-12-23 00:16:36,171 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 117 [2020-12-23 00:16:36,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:36,171 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-12-23 00:16:36,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:16:36,172 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-12-23 00:16:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 00:16:36,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:36,172 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:36,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 00:16:36,373 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:36,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:36,374 INFO L82 PathProgramCache]: Analyzing trace with hash 58223498, now seen corresponding path program 33 times [2020-12-23 00:16:36,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:36,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704801566] [2020-12-23 00:16:36,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-23 00:16:37,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704801566] [2020-12-23 00:16:37,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036673528] [2020-12-23 00:16:37,397 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 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 00:16:37,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 00:16:37,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:16:37,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:16:37,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 72 proven. 42 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-12-23 00:16:38,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:38,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 16] total 54 [2020-12-23 00:16:38,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968231002] [2020-12-23 00:16:38,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 00:16:38,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:38,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 00:16:38,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=2005, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 00:16:38,197 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 54 states. [2020-12-23 00:16:39,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:39,748 INFO L93 Difference]: Finished difference Result 194 states and 199 transitions. [2020-12-23 00:16:39,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 00:16:39,749 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 119 [2020-12-23 00:16:39,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:39,750 INFO L225 Difference]: With dead ends: 194 [2020-12-23 00:16:39,750 INFO L226 Difference]: Without dead ends: 125 [2020-12-23 00:16:39,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2643, Invalid=5729, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 00:16:39,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-23 00:16:39,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-12-23 00:16:39,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-23 00:16:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2020-12-23 00:16:39,757 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2020-12-23 00:16:39,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:39,757 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2020-12-23 00:16:39,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 00:16:39,757 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2020-12-23 00:16:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-23 00:16:39,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:39,758 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:39,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 00:16:39,974 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:39,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:39,974 INFO L82 PathProgramCache]: Analyzing trace with hash 550567469, now seen corresponding path program 34 times [2020-12-23 00:16:39,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:39,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248381737] [2020-12-23 00:16:39,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1572 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-23 00:16:41,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248381737] [2020-12-23 00:16:41,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893205172] [2020-12-23 00:16:41,112 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 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 00:16:41,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:16:41,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:16:41,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 00:16:41,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1572 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-23 00:16:41,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:41,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 00:16:41,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033540941] [2020-12-23 00:16:41,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 00:16:41,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:41,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 00:16:41,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:16:41,400 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 42 states. [2020-12-23 00:16:41,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:41,580 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2020-12-23 00:16:41,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 00:16:41,581 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 123 [2020-12-23 00:16:41,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:41,585 INFO L225 Difference]: With dead ends: 172 [2020-12-23 00:16:41,586 INFO L226 Difference]: Without dead ends: 127 [2020-12-23 00:16:41,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:16:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-23 00:16:41,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-12-23 00:16:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-23 00:16:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-12-23 00:16:41,592 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 123 [2020-12-23 00:16:41,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:41,593 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-12-23 00:16:41,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 00:16:41,593 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-12-23 00:16:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-23 00:16:41,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:41,594 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:41,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:16:41,805 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:41,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:41,806 INFO L82 PathProgramCache]: Analyzing trace with hash -838651925, now seen corresponding path program 35 times [2020-12-23 00:16:41,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:41,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540592491] [2020-12-23 00:16:41,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1649 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-23 00:16:42,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540592491] [2020-12-23 00:16:42,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610178478] [2020-12-23 00:16:42,949 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 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 00:16:50,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2020-12-23 00:16:50,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:16:50,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 00:16:50,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1649 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-23 00:16:50,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:50,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 00:16:50,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60492444] [2020-12-23 00:16:50,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 00:16:50,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:50,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 00:16:50,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:16:50,906 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 43 states. [2020-12-23 00:16:51,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:51,074 INFO L93 Difference]: Finished difference Result 174 states and 178 transitions. [2020-12-23 00:16:51,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:16:51,075 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 125 [2020-12-23 00:16:51,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:51,076 INFO L225 Difference]: With dead ends: 174 [2020-12-23 00:16:51,076 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 00:16:51,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:16:51,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 00:16:51,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-12-23 00:16:51,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 00:16:51,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2020-12-23 00:16:51,083 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2020-12-23 00:16:51,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:51,083 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2020-12-23 00:16:51,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 00:16:51,084 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2020-12-23 00:16:51,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-23 00:16:51,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:51,084 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:51,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:16:51,299 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:51,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:51,299 INFO L82 PathProgramCache]: Analyzing trace with hash -143660503, now seen corresponding path program 36 times [2020-12-23 00:16:51,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:51,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351771632] [2020-12-23 00:16:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-23 00:16:52,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351771632] [2020-12-23 00:16:52,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311975553] [2020-12-23 00:16:52,548 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 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 00:16:52,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 00:16:52,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:16:52,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:16:52,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:53,807 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:16:53,809 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:16:53,810 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:16:53,812 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:16:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 66 proven. 62 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-12-23 00:16:53,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:53,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 19] total 60 [2020-12-23 00:16:53,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57256157] [2020-12-23 00:16:53,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 00:16:53,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:53,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 00:16:53,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=987, Invalid=2553, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 00:16:53,907 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 60 states. [2020-12-23 00:16:57,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:57,748 INFO L93 Difference]: Finished difference Result 208 states and 214 transitions. [2020-12-23 00:16:57,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 00:16:57,749 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 127 [2020-12-23 00:16:57,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:57,750 INFO L225 Difference]: With dead ends: 208 [2020-12-23 00:16:57,750 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 00:16:57,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2617 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3193, Invalid=9917, Unknown=0, NotChecked=0, Total=13110 [2020-12-23 00:16:57,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 00:16:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-12-23 00:16:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 00:16:57,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-12-23 00:16:57,758 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 127 [2020-12-23 00:16:57,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:57,758 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-12-23 00:16:57,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 00:16:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-12-23 00:16:57,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-23 00:16:57,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:57,759 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 9, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:57,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:16:57,974 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:57,974 INFO L82 PathProgramCache]: Analyzing trace with hash 501035788, now seen corresponding path program 37 times [2020-12-23 00:16:57,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:57,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379593577] [2020-12-23 00:16:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 00:16:59,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379593577] [2020-12-23 00:16:59,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789463107] [2020-12-23 00:16:59,166 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 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 00:16:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:59,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 00:16:59,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:16:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 00:16:59,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:16:59,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 00:16:59,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318218771] [2020-12-23 00:16:59,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 00:16:59,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:59,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 00:16:59,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:16:59,440 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 45 states. [2020-12-23 00:16:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:59,633 INFO L93 Difference]: Finished difference Result 182 states and 186 transitions. [2020-12-23 00:16:59,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 00:16:59,634 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 131 [2020-12-23 00:16:59,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:59,635 INFO L225 Difference]: With dead ends: 182 [2020-12-23 00:16:59,635 INFO L226 Difference]: Without dead ends: 135 [2020-12-23 00:16:59,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 131 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 00:16:59,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-23 00:16:59,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-12-23 00:16:59,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-23 00:16:59,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-12-23 00:16:59,642 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 131 [2020-12-23 00:16:59,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:59,643 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-12-23 00:16:59,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 00:16:59,643 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-12-23 00:16:59,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-23 00:16:59,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:59,644 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 9, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:59,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 00:16:59,858 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:59,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:59,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1659320630, now seen corresponding path program 38 times [2020-12-23 00:16:59,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:59,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738208242] [2020-12-23 00:16:59,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1908 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 00:17:01,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738208242] [2020-12-23 00:17:01,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879031653] [2020-12-23 00:17:01,209 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 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 [2020-12-23 00:17:01,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:01,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:01,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 00:17:01,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1908 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 00:17:01,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:01,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-23 00:17:01,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062098311] [2020-12-23 00:17:01,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 00:17:01,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:01,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 00:17:01,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 00:17:01,499 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 46 states. [2020-12-23 00:17:01,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:01,702 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2020-12-23 00:17:01,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 00:17:01,702 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 133 [2020-12-23 00:17:01,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:01,703 INFO L225 Difference]: With dead ends: 184 [2020-12-23 00:17:01,703 INFO L226 Difference]: Without dead ends: 137 [2020-12-23 00:17:01,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 00:17:01,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-23 00:17:01,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-12-23 00:17:01,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 00:17:01,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2020-12-23 00:17:01,710 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 133 [2020-12-23 00:17:01,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:01,710 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2020-12-23 00:17:01,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 00:17:01,710 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2020-12-23 00:17:01,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 00:17:01,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:01,711 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 9, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:01,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:01,924 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:01,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1002332936, now seen corresponding path program 39 times [2020-12-23 00:17:01,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:01,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073897642] [2020-12-23 00:17:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1993 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 00:17:03,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073897642] [2020-12-23 00:17:03,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647686529] [2020-12-23 00:17:03,248 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:03,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 00:17:03,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:03,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 00:17:03,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:04,463 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:17:04,466 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:17:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1993 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 1851 trivial. 0 not checked. [2020-12-23 00:17:04,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:04,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 20] total 64 [2020-12-23 00:17:04,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354882805] [2020-12-23 00:17:04,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 00:17:04,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:04,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 00:17:04,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=2952, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 00:17:04,550 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 64 states. [2020-12-23 00:17:08,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:08,029 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2020-12-23 00:17:08,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-23 00:17:08,029 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 135 [2020-12-23 00:17:08,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:08,030 INFO L225 Difference]: With dead ends: 193 [2020-12-23 00:17:08,031 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 00:17:08,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3175, Invalid=9481, Unknown=0, NotChecked=0, Total=12656 [2020-12-23 00:17:08,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 00:17:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2020-12-23 00:17:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 00:17:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2020-12-23 00:17:08,038 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 135 [2020-12-23 00:17:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:08,038 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2020-12-23 00:17:08,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 00:17:08,039 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2020-12-23 00:17:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-23 00:17:08,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:08,039 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:08,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:08,255 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:08,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:08,255 INFO L82 PathProgramCache]: Analyzing trace with hash 334340924, now seen corresponding path program 40 times [2020-12-23 00:17:08,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:08,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529753344] [2020-12-23 00:17:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2106 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2020-12-23 00:17:09,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529753344] [2020-12-23 00:17:09,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581744895] [2020-12-23 00:17:09,731 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:09,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:17:09,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:09,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 00:17:09,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2106 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2020-12-23 00:17:10,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:10,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-23 00:17:10,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920049832] [2020-12-23 00:17:10,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 00:17:10,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:10,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 00:17:10,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:17:10,053 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 48 states. [2020-12-23 00:17:10,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:10,263 INFO L93 Difference]: Finished difference Result 196 states and 200 transitions. [2020-12-23 00:17:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 00:17:10,266 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 141 [2020-12-23 00:17:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:10,268 INFO L225 Difference]: With dead ends: 196 [2020-12-23 00:17:10,268 INFO L226 Difference]: Without dead ends: 145 [2020-12-23 00:17:10,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:17:10,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-23 00:17:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-12-23 00:17:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-23 00:17:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2020-12-23 00:17:10,276 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 141 [2020-12-23 00:17:10,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:10,277 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2020-12-23 00:17:10,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 00:17:10,277 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2020-12-23 00:17:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-23 00:17:10,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:10,278 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:10,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 00:17:10,492 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:10,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:10,493 INFO L82 PathProgramCache]: Analyzing trace with hash -641064582, now seen corresponding path program 41 times [2020-12-23 00:17:10,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:10,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047709367] [2020-12-23 00:17:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2195 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2020-12-23 00:17:12,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047709367] [2020-12-23 00:17:12,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68100752] [2020-12-23 00:17:12,016 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:02,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2020-12-23 00:18:02,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:02,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 00:18:02,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2195 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2020-12-23 00:18:03,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:03,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-23 00:18:03,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057616769] [2020-12-23 00:18:03,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 00:18:03,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:03,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 00:18:03,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:18:03,039 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 49 states. [2020-12-23 00:18:03,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:03,272 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2020-12-23 00:18:03,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 00:18:03,273 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 143 [2020-12-23 00:18:03,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:03,274 INFO L225 Difference]: With dead ends: 198 [2020-12-23 00:18:03,274 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 00:18:03,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:18:03,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 00:18:03,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-12-23 00:18:03,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-23 00:18:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2020-12-23 00:18:03,281 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 143 [2020-12-23 00:18:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:03,281 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2020-12-23 00:18:03,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 00:18:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2020-12-23 00:18:03,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-23 00:18:03,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:03,282 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:03,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 00:18:03,498 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:03,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:03,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1702885320, now seen corresponding path program 42 times [2020-12-23 00:18:03,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:03,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501328007] [2020-12-23 00:18:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2286 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2020-12-23 00:18:05,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501328007] [2020-12-23 00:18:05,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692603251] [2020-12-23 00:18:05,057 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:05,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 00:18:05,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:05,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 00:18:05,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:06,892 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:18:06,896 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:18:06,897 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:18:06,897 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:18:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2286 backedges. 91 proven. 79 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2020-12-23 00:18:07,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:07,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 21] total 68 [2020-12-23 00:18:07,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733485619] [2020-12-23 00:18:07,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 00:18:07,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:07,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 00:18:07,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=3277, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 00:18:07,003 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 68 states. [2020-12-23 00:18:13,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:13,063 INFO L93 Difference]: Finished difference Result 236 states and 242 transitions. [2020-12-23 00:18:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 00:18:13,064 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 145 [2020-12-23 00:18:13,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:13,065 INFO L225 Difference]: With dead ends: 236 [2020-12-23 00:18:13,065 INFO L226 Difference]: Without dead ends: 151 [2020-12-23 00:18:13,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3419 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4156, Invalid=12874, Unknown=0, NotChecked=0, Total=17030 [2020-12-23 00:18:13,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-23 00:18:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2020-12-23 00:18:13,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 00:18:13,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-12-23 00:18:13,072 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 145 [2020-12-23 00:18:13,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:13,073 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-12-23 00:18:13,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 00:18:13,073 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-12-23 00:18:13,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-23 00:18:13,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:13,074 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 10, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:13,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 00:18:13,288 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:13,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:13,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1984446683, now seen corresponding path program 43 times [2020-12-23 00:18:13,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:13,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181037002] [2020-12-23 00:18:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2397 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2020-12-23 00:18:14,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181037002] [2020-12-23 00:18:14,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55716637] [2020-12-23 00:18:15,000 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:15,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 00:18:15,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2397 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2020-12-23 00:18:15,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:15,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-23 00:18:15,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436157598] [2020-12-23 00:18:15,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 00:18:15,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:15,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 00:18:15,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 00:18:15,302 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 51 states. [2020-12-23 00:18:15,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:15,543 INFO L93 Difference]: Finished difference Result 206 states and 210 transitions. [2020-12-23 00:18:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 00:18:15,546 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 149 [2020-12-23 00:18:15,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:15,547 INFO L225 Difference]: With dead ends: 206 [2020-12-23 00:18:15,547 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 00:18:15,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 00:18:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 00:18:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-12-23 00:18:15,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 00:18:15,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2020-12-23 00:18:15,553 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 149 [2020-12-23 00:18:15,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:15,553 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2020-12-23 00:18:15,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 00:18:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2020-12-23 00:18:15,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-23 00:18:15,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:15,554 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 10, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:15,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:15,755 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:15,756 INFO L82 PathProgramCache]: Analyzing trace with hash 928620825, now seen corresponding path program 44 times [2020-12-23 00:18:15,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:15,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695721149] [2020-12-23 00:18:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2020-12-23 00:18:17,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695721149] [2020-12-23 00:18:17,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501689889] [2020-12-23 00:18:17,451 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:17,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:18:17,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:17,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 00:18:17,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2020-12-23 00:18:17,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:17,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-23 00:18:17,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734803966] [2020-12-23 00:18:17,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 00:18:17,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:17,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 00:18:17,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:18:17,767 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand 52 states. [2020-12-23 00:18:18,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:18,014 INFO L93 Difference]: Finished difference Result 208 states and 212 transitions. [2020-12-23 00:18:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 00:18:18,015 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 151 [2020-12-23 00:18:18,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:18,016 INFO L225 Difference]: With dead ends: 208 [2020-12-23 00:18:18,016 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 00:18:18,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:18:18,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 00:18:18,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-12-23 00:18:18,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-23 00:18:18,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-12-23 00:18:18,023 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 151 [2020-12-23 00:18:18,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:18,023 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-12-23 00:18:18,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 00:18:18,023 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-12-23 00:18:18,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-23 00:18:18,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:18,024 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 10, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:18,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:18,238 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:18,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:18,238 INFO L82 PathProgramCache]: Analyzing trace with hash -107746857, now seen corresponding path program 45 times [2020-12-23 00:18:18,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:18,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071875708] [2020-12-23 00:18:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2589 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2020-12-23 00:18:20,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071875708] [2020-12-23 00:18:20,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487692456] [2020-12-23 00:18:20,095 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:20,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 00:18:20,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:20,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 00:18:20,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:21,639 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:18:21,643 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:18:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2589 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 2403 trivial. 0 not checked. [2020-12-23 00:18:21,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:21,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 22] total 72 [2020-12-23 00:18:21,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281359886] [2020-12-23 00:18:21,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 00:18:21,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:21,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 00:18:21,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=3736, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 00:18:21,741 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 72 states. [2020-12-23 00:18:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:26,654 INFO L93 Difference]: Finished difference Result 217 states and 222 transitions. [2020-12-23 00:18:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 00:18:26,655 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 153 [2020-12-23 00:18:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:26,656 INFO L225 Difference]: With dead ends: 217 [2020-12-23 00:18:26,656 INFO L226 Difference]: Without dead ends: 164 [2020-12-23 00:18:26,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2943 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4053, Invalid=11949, Unknown=0, NotChecked=0, Total=16002 [2020-12-23 00:18:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-23 00:18:26,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2020-12-23 00:18:26,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-23 00:18:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2020-12-23 00:18:26,665 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 153 [2020-12-23 00:18:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:26,665 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2020-12-23 00:18:26,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 00:18:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2020-12-23 00:18:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-23 00:18:26,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:26,667 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:26,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:26,882 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:26,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:26,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1837730037, now seen corresponding path program 46 times [2020-12-23 00:18:26,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:26,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952248035] [2020-12-23 00:18:26,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-12-23 00:18:28,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952248035] [2020-12-23 00:18:28,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792450129] [2020-12-23 00:18:28,816 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:28,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:18:28,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:28,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 00:18:28,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-12-23 00:18:29,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:29,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-23 00:18:29,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950532402] [2020-12-23 00:18:29,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 00:18:29,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:29,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 00:18:29,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 00:18:29,173 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 54 states. [2020-12-23 00:18:29,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:29,432 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2020-12-23 00:18:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 00:18:29,433 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 159 [2020-12-23 00:18:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:29,434 INFO L225 Difference]: With dead ends: 220 [2020-12-23 00:18:29,434 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 00:18:29,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 00:18:29,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 00:18:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-12-23 00:18:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 00:18:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2020-12-23 00:18:29,441 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 159 [2020-12-23 00:18:29,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:29,441 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2020-12-23 00:18:29,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 00:18:29,441 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2020-12-23 00:18:29,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-23 00:18:29,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:29,442 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:29,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:29,651 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:29,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:29,651 INFO L82 PathProgramCache]: Analyzing trace with hash -994893367, now seen corresponding path program 47 times [2020-12-23 00:18:29,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:29,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666936662] [2020-12-23 00:18:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-12-23 00:18:31,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666936662] [2020-12-23 00:18:31,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633555068] [2020-12-23 00:18:31,624 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:19:28,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2020-12-23 00:19:28,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:19:28,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 00:19:28,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-12-23 00:19:28,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:28,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-23 00:19:28,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108185543] [2020-12-23 00:19:28,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 00:19:28,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:28,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 00:19:28,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 00:19:28,383 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand 55 states. [2020-12-23 00:19:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:28,623 INFO L93 Difference]: Finished difference Result 222 states and 226 transitions. [2020-12-23 00:19:28,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 00:19:28,624 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 161 [2020-12-23 00:19:28,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:28,625 INFO L225 Difference]: With dead ends: 222 [2020-12-23 00:19:28,625 INFO L226 Difference]: Without dead ends: 165 [2020-12-23 00:19:28,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 00:19:28,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-23 00:19:28,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2020-12-23 00:19:28,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 00:19:28,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2020-12-23 00:19:28,632 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 161 [2020-12-23 00:19:28,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:28,633 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2020-12-23 00:19:28,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 00:19:28,633 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2020-12-23 00:19:28,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-23 00:19:28,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:28,634 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:28,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 00:19:28,835 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:28,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:28,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1517294855, now seen corresponding path program 48 times [2020-12-23 00:19:28,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:28,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535297819] [2020-12-23 00:19:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2922 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-12-23 00:19:30,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535297819] [2020-12-23 00:19:30,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319639985] [2020-12-23 00:19:30,900 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:19:31,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 00:19:31,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:19:31,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 00:19:31,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:32,568 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:19:33,421 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:19:33,422 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:19:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2922 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2020-12-23 00:19:33,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:33,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 26] total 79 [2020-12-23 00:19:33,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566646113] [2020-12-23 00:19:33,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-23 00:19:33,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:33,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-23 00:19:33,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=4562, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 00:19:33,550 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 79 states. [2020-12-23 00:19:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:38,974 INFO L93 Difference]: Finished difference Result 231 states and 236 transitions. [2020-12-23 00:19:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-23 00:19:38,975 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 163 [2020-12-23 00:19:38,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:38,977 INFO L225 Difference]: With dead ends: 231 [2020-12-23 00:19:38,977 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 00:19:38,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3567 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=4533, Invalid=13557, Unknown=0, NotChecked=0, Total=18090 [2020-12-23 00:19:38,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 00:19:38,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2020-12-23 00:19:38,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-23 00:19:38,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2020-12-23 00:19:38,986 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 163 [2020-12-23 00:19:38,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:38,986 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2020-12-23 00:19:38,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-23 00:19:38,986 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2020-12-23 00:19:38,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-23 00:19:38,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:38,987 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:39,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:19:39,202 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:39,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:39,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2040376133, now seen corresponding path program 49 times [2020-12-23 00:19:39,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:39,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053511754] [2020-12-23 00:19:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3061 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-12-23 00:19:41,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053511754] [2020-12-23 00:19:41,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645898297] [2020-12-23 00:19:41,447 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:19:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:41,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 00:19:41,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3061 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-12-23 00:19:41,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:41,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-23 00:19:41,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418544238] [2020-12-23 00:19:41,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 00:19:41,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:41,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 00:19:41,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 00:19:41,783 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 57 states. [2020-12-23 00:19:42,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:42,058 INFO L93 Difference]: Finished difference Result 234 states and 238 transitions. [2020-12-23 00:19:42,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 00:19:42,059 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 169 [2020-12-23 00:19:42,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:42,060 INFO L225 Difference]: With dead ends: 234 [2020-12-23 00:19:42,060 INFO L226 Difference]: Without dead ends: 173 [2020-12-23 00:19:42,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 00:19:42,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-23 00:19:42,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2020-12-23 00:19:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-23 00:19:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2020-12-23 00:19:42,067 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 169 [2020-12-23 00:19:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:42,068 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2020-12-23 00:19:42,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 00:19:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2020-12-23 00:19:42,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-23 00:19:42,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:42,069 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:42,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 00:19:42,285 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:42,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:42,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2114923001, now seen corresponding path program 50 times [2020-12-23 00:19:42,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:42,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014028595] [2020-12-23 00:19:42,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3168 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-12-23 00:19:44,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014028595] [2020-12-23 00:19:44,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900291511] [2020-12-23 00:19:44,640 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:19:44,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:19:44,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:19:44,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 00:19:44,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3168 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-12-23 00:19:45,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:45,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-23 00:19:45,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584155449] [2020-12-23 00:19:45,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 00:19:45,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:45,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 00:19:45,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 00:19:45,017 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand 58 states. [2020-12-23 00:19:45,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:45,318 INFO L93 Difference]: Finished difference Result 236 states and 240 transitions. [2020-12-23 00:19:45,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 00:19:45,319 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 171 [2020-12-23 00:19:45,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:45,320 INFO L225 Difference]: With dead ends: 236 [2020-12-23 00:19:45,320 INFO L226 Difference]: Without dead ends: 175 [2020-12-23 00:19:45,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 00:19:45,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-23 00:19:45,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2020-12-23 00:19:45,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 00:19:45,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2020-12-23 00:19:45,327 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 171 [2020-12-23 00:19:45,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:45,328 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2020-12-23 00:19:45,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 00:19:45,328 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2020-12-23 00:19:45,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-23 00:19:45,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:45,329 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:45,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 00:19:45,545 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:45,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:45,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1037805495, now seen corresponding path program 51 times [2020-12-23 00:19:45,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:45,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205828942] [2020-12-23 00:19:45,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat