/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/loop-invgen/down.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:54:44,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:54:44,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:54:44,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-23 06:54:44,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:54:44,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:54:44,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:54:44,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:54:44,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:54:44,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:54:44,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:54:44,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:54:44,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:54:44,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:54:44,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:54:44,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:54:44,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:54:44,310 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 06:54:44,361 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:54:44,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:54:44,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:54:44,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:54:44,365 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:54:44,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:54:44,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:54:44,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:54:44,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:54:44,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:54:44,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:54:44,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:54:44,369 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:54:44,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:54:44,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:54:44,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:54:44,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:54:44,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:54:44,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:54:44,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:54:44,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:54:44,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:54:44,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:54:44,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:54:44,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:54:44,372 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:54:44,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:54:44,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:54:44,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:54:44,794 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:54:44,795 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:54:44,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/down.i [2020-12-23 06:54:44,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a35420183/a3626bdf35a34ca58fa3a24653b231ef/FLAG762924e73 [2020-12-23 06:54:45,460 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:54:45,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-invgen/down.i [2020-12-23 06:54:45,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a35420183/a3626bdf35a34ca58fa3a24653b231ef/FLAG762924e73 [2020-12-23 06:54:45,795 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a35420183/a3626bdf35a34ca58fa3a24653b231ef [2020-12-23 06:54:45,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:54:45,800 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:54:45,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:54:45,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:54:45,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:54:45,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:54:45" (1/1) ... [2020-12-23 06:54:45,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b9517f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:45, skipping insertion in model container [2020-12-23 06:54:45,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:54:45" (1/1) ... [2020-12-23 06:54:45,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:54:45,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:54:46,069 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/loop-invgen/down.i[893,906] left hand side expression in assignment: lhs: VariableLHS[~n~0,] [2020-12-23 06:54:46,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:54:46,111 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:54:46,129 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/loop-invgen/down.i[893,906] left hand side expression in assignment: lhs: VariableLHS[~n~0,] [2020-12-23 06:54:46,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:54:46,159 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:54:46,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:46 WrapperNode [2020-12-23 06:54:46,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:54:46,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:54:46,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:54:46,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:54:46,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:46" (1/1) ... [2020-12-23 06:54:46,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:46" (1/1) ... [2020-12-23 06:54:46,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:54:46,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:54:46,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:54:46,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:54:46,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:46" (1/1) ... [2020-12-23 06:54:46,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:46" (1/1) ... [2020-12-23 06:54:46,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:46" (1/1) ... [2020-12-23 06:54:46,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:46" (1/1) ... [2020-12-23 06:54:46,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:46" (1/1) ... [2020-12-23 06:54:46,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:46" (1/1) ... [2020-12-23 06:54:46,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:46" (1/1) ... [2020-12-23 06:54:46,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:54:46,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:54:46,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:54:46,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:54:46,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:46" (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 06:54:46,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:54:46,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:54:46,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:54:46,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:54:46,693 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:54:46,694 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 06:54:46,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:54:46 BoogieIcfgContainer [2020-12-23 06:54:46,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:54:46,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:54:46,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:54:46,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:54:46,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:54:45" (1/3) ... [2020-12-23 06:54:46,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e80b98d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:54:46, skipping insertion in model container [2020-12-23 06:54:46,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:46" (2/3) ... [2020-12-23 06:54:46,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e80b98d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:54:46, skipping insertion in model container [2020-12-23 06:54:46,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:54:46" (3/3) ... [2020-12-23 06:54:46,704 INFO L111 eAbstractionObserver]: Analyzing ICFG down.i [2020-12-23 06:54:46,710 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:54:46,715 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:54:46,734 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:54:46,764 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:54:46,764 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:54:46,764 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:54:46,764 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:54:46,764 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:54:46,765 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:54:46,765 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:54:46,765 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:54:46,815 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-23 06:54:46,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:54:46,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:46,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:46,843 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:46,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:46,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1808851121, now seen corresponding path program 1 times [2020-12-23 06:54:46,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:46,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121355619] [2020-12-23 06:54:46,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:47,068 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 06:54:47,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121355619] [2020-12-23 06:54:47,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:54:47,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:54:47,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479643158] [2020-12-23 06:54:47,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:54:47,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:47,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:54:47,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:54:47,092 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 5 states. [2020-12-23 06:54:47,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:47,178 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2020-12-23 06:54:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:54:47,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 06:54:47,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:47,190 INFO L225 Difference]: With dead ends: 30 [2020-12-23 06:54:47,190 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:54:47,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:54:47,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:54:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 06:54:47,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 06:54:47,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-23 06:54:47,235 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2020-12-23 06:54:47,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:47,235 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-23 06:54:47,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:54:47,236 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-23 06:54:47,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:54:47,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:47,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:47,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:54:47,238 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:47,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:47,244 INFO L82 PathProgramCache]: Analyzing trace with hash 291256044, now seen corresponding path program 1 times [2020-12-23 06:54:47,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:47,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594844630] [2020-12-23 06:54:47,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:47,375 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 06:54:47,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594844630] [2020-12-23 06:54:47,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170485452] [2020-12-23 06:54:47,377 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 06:54:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:47,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:54:47,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:47,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:54:47,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2020-12-23 06:54:47,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920664446] [2020-12-23 06:54:47,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:54:47,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:47,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:54:47,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:54:47,519 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2020-12-23 06:54:47,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:47,566 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-12-23 06:54:47,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:54:47,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 06:54:47,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:47,567 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:54:47,567 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 06:54:47,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:54:47,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 06:54:47,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2020-12-23 06:54:47,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 06:54:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-23 06:54:47,572 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-12-23 06:54:47,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:47,573 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-23 06:54:47,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:54:47,573 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-23 06:54:47,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:54:47,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:47,574 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:47,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:54:47,788 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:47,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:47,791 INFO L82 PathProgramCache]: Analyzing trace with hash 979689165, now seen corresponding path program 1 times [2020-12-23 06:54:47,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:47,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487583306] [2020-12-23 06:54:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:47,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487583306] [2020-12-23 06:54:47,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337442014] [2020-12-23 06:54:47,880 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 06:54:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:47,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:54:47,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:47,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:47,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:54:47,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210790987] [2020-12-23 06:54:47,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:54:47,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:47,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:54:47,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:54:47,982 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 8 states. [2020-12-23 06:54:48,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:48,078 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-12-23 06:54:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:54:48,079 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-23 06:54:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:48,080 INFO L225 Difference]: With dead ends: 23 [2020-12-23 06:54:48,080 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 06:54:48,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:54:48,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 06:54:48,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 06:54:48,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 06:54:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-23 06:54:48,094 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2020-12-23 06:54:48,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:48,095 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-23 06:54:48,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:54:48,095 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-23 06:54:48,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:54:48,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:48,096 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:48,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:48,317 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:48,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:48,319 INFO L82 PathProgramCache]: Analyzing trace with hash -510353528, now seen corresponding path program 2 times [2020-12-23 06:54:48,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:48,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858414325] [2020-12-23 06:54:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:48,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858414325] [2020-12-23 06:54:48,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228477379] [2020-12-23 06:54:48,385 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 06:54:48,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:54:48,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:48,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:54:48,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:48,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:48,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-23 06:54:48,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683896524] [2020-12-23 06:54:48,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:54:48,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:48,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:54:48,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:54:48,496 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2020-12-23 06:54:48,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:48,630 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-12-23 06:54:48,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:54:48,630 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-23 06:54:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:48,634 INFO L225 Difference]: With dead ends: 24 [2020-12-23 06:54:48,634 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 06:54:48,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:54:48,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 06:54:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2020-12-23 06:54:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 06:54:48,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-23 06:54:48,646 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-12-23 06:54:48,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:48,646 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-23 06:54:48,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:54:48,647 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-23 06:54:48,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 06:54:48,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:48,648 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:48,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:48,855 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:48,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:48,859 INFO L82 PathProgramCache]: Analyzing trace with hash 247095473, now seen corresponding path program 3 times [2020-12-23 06:54:48,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:48,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646899355] [2020-12-23 06:54:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:49,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646899355] [2020-12-23 06:54:49,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288885264] [2020-12-23 06:54:49,008 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 06:54:49,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 06:54:49,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:49,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:54:49,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:49,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:49,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:54:49,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760795283] [2020-12-23 06:54:49,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:54:49,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:49,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:54:49,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:54:49,121 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 10 states. [2020-12-23 06:54:49,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:49,203 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-23 06:54:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:54:49,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-12-23 06:54:49,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:49,204 INFO L225 Difference]: With dead ends: 30 [2020-12-23 06:54:49,204 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 06:54:49,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:54:49,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 06:54:49,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 06:54:49,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 06:54:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-23 06:54:49,209 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2020-12-23 06:54:49,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:49,209 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-23 06:54:49,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:54:49,209 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-23 06:54:49,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:54:49,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:49,210 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:49,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:49,424 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:49,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:49,426 INFO L82 PathProgramCache]: Analyzing trace with hash 576015340, now seen corresponding path program 4 times [2020-12-23 06:54:49,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:49,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052827831] [2020-12-23 06:54:49,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:49,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052827831] [2020-12-23 06:54:49,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380411768] [2020-12-23 06:54:49,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:49,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:54:49,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:49,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:54:49,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:49,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:49,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-23 06:54:49,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022783284] [2020-12-23 06:54:49,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:54:49,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:49,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:54:49,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:54:49,638 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2020-12-23 06:54:49,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:49,727 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-23 06:54:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:54:49,728 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-23 06:54:49,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:49,729 INFO L225 Difference]: With dead ends: 28 [2020-12-23 06:54:49,729 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 06:54:49,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:54:49,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 06:54:49,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2020-12-23 06:54:49,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 06:54:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-23 06:54:49,735 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-12-23 06:54:49,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:49,735 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-23 06:54:49,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:54:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-23 06:54:49,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:54:49,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:49,736 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:49,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 06:54:49,946 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:49,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:49,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1683466701, now seen corresponding path program 5 times [2020-12-23 06:54:49,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:49,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217481838] [2020-12-23 06:54:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:49,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:50,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217481838] [2020-12-23 06:54:50,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113615949] [2020-12-23 06:54:50,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:50,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 06:54:50,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:50,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:54:50,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:50,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:50,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 06:54:50,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518042170] [2020-12-23 06:54:50,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:54:50,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:50,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:54:50,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:54:50,194 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 12 states. [2020-12-23 06:54:50,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:50,322 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-12-23 06:54:50,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:54:50,322 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-12-23 06:54:50,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:50,323 INFO L225 Difference]: With dead ends: 37 [2020-12-23 06:54:50,323 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 06:54:50,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:54:50,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 06:54:50,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 06:54:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 06:54:50,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-23 06:54:50,328 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-12-23 06:54:50,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:50,329 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-23 06:54:50,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:54:50,329 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-23 06:54:50,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 06:54:50,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:50,330 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:50,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:50,544 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:50,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:50,545 INFO L82 PathProgramCache]: Analyzing trace with hash 230981512, now seen corresponding path program 6 times [2020-12-23 06:54:50,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:50,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519188292] [2020-12-23 06:54:50,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:50,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519188292] [2020-12-23 06:54:50,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014217620] [2020-12-23 06:54:50,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:50,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 06:54:50,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:50,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:54:50,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:50,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:50,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-23 06:54:50,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399835736] [2020-12-23 06:54:50,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:54:50,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:50,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:54:50,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:54:50,745 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2020-12-23 06:54:50,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:50,866 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-12-23 06:54:50,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:54:50,867 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-23 06:54:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:50,869 INFO L225 Difference]: With dead ends: 32 [2020-12-23 06:54:50,869 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 06:54:50,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:54:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 06:54:50,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2020-12-23 06:54:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 06:54:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-23 06:54:50,884 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2020-12-23 06:54:50,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:50,884 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-23 06:54:50,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:54:50,884 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-23 06:54:50,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 06:54:50,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:50,886 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:51,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:51,100 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:51,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:51,101 INFO L82 PathProgramCache]: Analyzing trace with hash 637436081, now seen corresponding path program 7 times [2020-12-23 06:54:51,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:51,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661700981] [2020-12-23 06:54:51,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:51,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661700981] [2020-12-23 06:54:51,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762002877] [2020-12-23 06:54:51,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:51,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:54:51,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:51,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:51,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 06:54:51,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483537462] [2020-12-23 06:54:51,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:54:51,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:51,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:54:51,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:54:51,325 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 14 states. [2020-12-23 06:54:51,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:51,462 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-12-23 06:54:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:54:51,462 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-12-23 06:54:51,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:51,463 INFO L225 Difference]: With dead ends: 44 [2020-12-23 06:54:51,463 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 06:54:51,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:54:51,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 06:54:51,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 06:54:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 06:54:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-23 06:54:51,468 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2020-12-23 06:54:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:51,468 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-23 06:54:51,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:54:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-23 06:54:51,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:54:51,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:51,469 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:51,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 06:54:51,685 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:51,686 INFO L82 PathProgramCache]: Analyzing trace with hash -45874964, now seen corresponding path program 8 times [2020-12-23 06:54:51,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:51,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400030676] [2020-12-23 06:54:51,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:51,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400030676] [2020-12-23 06:54:51,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333144820] [2020-12-23 06:54:51,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:51,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:54:51,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:51,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:54:51,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:51,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:51,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-12-23 06:54:51,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628606761] [2020-12-23 06:54:51,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:54:51,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:51,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:54:51,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:54:51,899 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2020-12-23 06:54:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:52,012 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-12-23 06:54:52,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:54:52,013 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-12-23 06:54:52,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:52,014 INFO L225 Difference]: With dead ends: 36 [2020-12-23 06:54:52,014 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 06:54:52,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:54:52,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 06:54:52,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-12-23 06:54:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 06:54:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-23 06:54:52,021 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-12-23 06:54:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:52,021 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-23 06:54:52,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:54:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-23 06:54:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 06:54:52,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:52,022 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:52,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:52,236 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:52,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:52,237 INFO L82 PathProgramCache]: Analyzing trace with hash -856632115, now seen corresponding path program 9 times [2020-12-23 06:54:52,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:52,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388311743] [2020-12-23 06:54:52,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:52,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388311743] [2020-12-23 06:54:52,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437776457] [2020-12-23 06:54:52,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:52,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 06:54:52,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:52,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:54:52,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:52,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:52,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 06:54:52,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65281956] [2020-12-23 06:54:52,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:54:52,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:52,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:54:52,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:54:52,498 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 16 states. [2020-12-23 06:54:52,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:52,669 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-12-23 06:54:52,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:54:52,669 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-12-23 06:54:52,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:52,670 INFO L225 Difference]: With dead ends: 51 [2020-12-23 06:54:52,670 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 06:54:52,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:54:52,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 06:54:52,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-23 06:54:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 06:54:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-12-23 06:54:52,676 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2020-12-23 06:54:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:52,676 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-12-23 06:54:52,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:54:52,676 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-12-23 06:54:52,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 06:54:52,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:52,677 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:52,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:52,892 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:52,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2001354872, now seen corresponding path program 10 times [2020-12-23 06:54:52,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:52,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370169126] [2020-12-23 06:54:52,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:52,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370169126] [2020-12-23 06:54:52,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88894525] [2020-12-23 06:54:52,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:53,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:54:53,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:53,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 06:54:53,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:53,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:53,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-12-23 06:54:53,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244565485] [2020-12-23 06:54:53,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:54:53,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:53,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:54:53,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:54:53,140 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2020-12-23 06:54:53,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:53,295 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-23 06:54:53,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:54:53,295 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-12-23 06:54:53,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:53,298 INFO L225 Difference]: With dead ends: 40 [2020-12-23 06:54:53,298 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 06:54:53,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:54:53,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 06:54:53,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-12-23 06:54:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 06:54:53,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-23 06:54:53,310 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2020-12-23 06:54:53,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:53,310 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-23 06:54:53,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:54:53,310 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-23 06:54:53,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 06:54:53,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:53,315 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:53,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 06:54:53,530 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:53,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:53,531 INFO L82 PathProgramCache]: Analyzing trace with hash 377831601, now seen corresponding path program 11 times [2020-12-23 06:54:53,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:53,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972525987] [2020-12-23 06:54:53,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:53,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972525987] [2020-12-23 06:54:53,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409937342] [2020-12-23 06:54:53,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:53,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 06:54:53,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:53,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:54:53,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:53,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:53,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 06:54:53,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900668522] [2020-12-23 06:54:53,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:54:53,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:53,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:54:53,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:54:53,873 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 18 states. [2020-12-23 06:54:54,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:54,065 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-12-23 06:54:54,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:54:54,065 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-12-23 06:54:54,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:54,068 INFO L225 Difference]: With dead ends: 58 [2020-12-23 06:54:54,068 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 06:54:54,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:54:54,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 06:54:54,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 06:54:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 06:54:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-23 06:54:54,093 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2020-12-23 06:54:54,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:54,093 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-23 06:54:54,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:54:54,094 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-23 06:54:54,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 06:54:54,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:54,094 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:54,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:54:54,311 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:54,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:54,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1007703532, now seen corresponding path program 12 times [2020-12-23 06:54:54,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:54,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198306499] [2020-12-23 06:54:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:54,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198306499] [2020-12-23 06:54:54,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759139901] [2020-12-23 06:54:54,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:54,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:54:54,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:54,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:54:54,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:54,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:54,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-12-23 06:54:54,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443783878] [2020-12-23 06:54:54,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:54:54,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:54,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:54:54,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:54:54,554 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-12-23 06:54:54,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:54,707 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-12-23 06:54:54,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:54:54,708 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-12-23 06:54:54,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:54,708 INFO L225 Difference]: With dead ends: 44 [2020-12-23 06:54:54,709 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 06:54:54,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:54:54,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 06:54:54,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-12-23 06:54:54,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 06:54:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-23 06:54:54,716 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2020-12-23 06:54:54,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:54,716 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-23 06:54:54,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:54:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-23 06:54:54,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 06:54:54,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:54,717 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:54,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:54:54,931 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:54,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:54,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1320656947, now seen corresponding path program 13 times [2020-12-23 06:54:54,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:54,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301539240] [2020-12-23 06:54:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:55,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301539240] [2020-12-23 06:54:55,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856293439] [2020-12-23 06:54:55,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:55,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 06:54:55,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:55,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:55,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 06:54:55,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743071752] [2020-12-23 06:54:55,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:54:55,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:55,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:54:55,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:54:55,262 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 20 states. [2020-12-23 06:54:55,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:55,521 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-12-23 06:54:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:54:55,521 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 35 [2020-12-23 06:54:55,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:55,521 INFO L225 Difference]: With dead ends: 65 [2020-12-23 06:54:55,522 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 06:54:55,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:54:55,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 06:54:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 06:54:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 06:54:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-12-23 06:54:55,528 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2020-12-23 06:54:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:55,528 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-12-23 06:54:55,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:54:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-12-23 06:54:55,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 06:54:55,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:55,529 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:55,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:55,745 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:55,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:55,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1149263752, now seen corresponding path program 14 times [2020-12-23 06:54:55,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:55,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231497334] [2020-12-23 06:54:55,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:55,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231497334] [2020-12-23 06:54:55,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680298770] [2020-12-23 06:54:55,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:55,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:54:55,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:55,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 06:54:55,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:56,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:56,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-23 06:54:56,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460520126] [2020-12-23 06:54:56,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:54:56,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:56,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:54:56,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:54:56,072 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2020-12-23 06:54:56,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:56,242 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-12-23 06:54:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:54:56,242 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-12-23 06:54:56,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:56,243 INFO L225 Difference]: With dead ends: 48 [2020-12-23 06:54:56,243 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:54:56,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:54:56,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:54:56,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-12-23 06:54:56,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 06:54:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-12-23 06:54:56,255 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2020-12-23 06:54:56,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:56,255 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-12-23 06:54:56,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:54:56,256 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-12-23 06:54:56,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 06:54:56,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:56,256 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:56,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:54:56,471 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:56,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:56,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1758027599, now seen corresponding path program 15 times [2020-12-23 06:54:56,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:56,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319523198] [2020-12-23 06:54:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:56,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319523198] [2020-12-23 06:54:56,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713186112] [2020-12-23 06:54:56,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:56,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 06:54:56,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:56,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 06:54:56,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:56,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:56,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 06:54:56,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210568910] [2020-12-23 06:54:56,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:54:56,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:56,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:54:56,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:54:56,860 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 22 states. [2020-12-23 06:54:57,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:57,086 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-12-23 06:54:57,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:54:57,086 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 39 [2020-12-23 06:54:57,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:57,087 INFO L225 Difference]: With dead ends: 72 [2020-12-23 06:54:57,087 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 06:54:57,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:54:57,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 06:54:57,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-23 06:54:57,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 06:54:57,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-12-23 06:54:57,094 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2020-12-23 06:54:57,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:57,095 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-12-23 06:54:57,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:54:57,095 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-12-23 06:54:57,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 06:54:57,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:57,096 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:57,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:54:57,310 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:57,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:57,311 INFO L82 PathProgramCache]: Analyzing trace with hash -895333652, now seen corresponding path program 16 times [2020-12-23 06:54:57,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:57,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344230815] [2020-12-23 06:54:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:57,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344230815] [2020-12-23 06:54:57,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674323169] [2020-12-23 06:54:57,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:54:57,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:54:57,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:57,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 06:54:57,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:57,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:57,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-12-23 06:54:57,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415097106] [2020-12-23 06:54:57,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:54:57,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:57,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:54:57,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:54:57,567 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-12-23 06:54:57,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:57,766 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-23 06:54:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:54:57,767 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-12-23 06:54:57,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:57,768 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:54:57,768 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 06:54:57,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:54:57,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 06:54:57,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2020-12-23 06:54:57,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 06:54:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-23 06:54:57,775 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2020-12-23 06:54:57,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:57,776 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-23 06:54:57,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:54:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-23 06:54:57,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 06:54:57,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:57,777 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:57,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:54:57,984 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1133098291, now seen corresponding path program 17 times [2020-12-23 06:54:57,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:57,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576047506] [2020-12-23 06:54:57,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:58,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576047506] [2020-12-23 06:54:58,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444376067] [2020-12-23 06:54:58,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:58,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 06:54:58,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:58,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:54:58,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:58,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:58,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 06:54:58,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810109181] [2020-12-23 06:54:58,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:54:58,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:58,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:54:58,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:54:58,371 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 24 states. [2020-12-23 06:54:58,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:58,661 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-12-23 06:54:58,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:54:58,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 43 [2020-12-23 06:54:58,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:58,662 INFO L225 Difference]: With dead ends: 79 [2020-12-23 06:54:58,662 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 06:54:58,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:54:58,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 06:54:58,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 06:54:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 06:54:58,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-23 06:54:58,669 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2020-12-23 06:54:58,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:58,669 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-23 06:54:58,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:54:58,669 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-23 06:54:58,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 06:54:58,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:58,670 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:58,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:58,884 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:58,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:58,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1589878904, now seen corresponding path program 18 times [2020-12-23 06:54:58,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:58,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647077536] [2020-12-23 06:54:58,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:59,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647077536] [2020-12-23 06:54:59,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259704738] [2020-12-23 06:54:59,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:59,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 06:54:59,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:59,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 06:54:59,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:59,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:59,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-12-23 06:54:59,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982953484] [2020-12-23 06:54:59,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:54:59,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:59,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:54:59,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:54:59,190 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-12-23 06:54:59,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:59,397 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-12-23 06:54:59,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:54:59,398 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-12-23 06:54:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:59,398 INFO L225 Difference]: With dead ends: 56 [2020-12-23 06:54:59,399 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 06:54:59,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:54:59,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 06:54:59,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-12-23 06:54:59,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 06:54:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-23 06:54:59,406 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2020-12-23 06:54:59,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:59,406 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-23 06:54:59,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:54:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-23 06:54:59,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 06:54:59,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:59,407 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:59,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:59,623 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:59,624 INFO L82 PathProgramCache]: Analyzing trace with hash 821731505, now seen corresponding path program 19 times [2020-12-23 06:54:59,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:59,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917422425] [2020-12-23 06:54:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:59,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917422425] [2020-12-23 06:54:59,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387126327] [2020-12-23 06:54:59,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:00,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:55:00,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:00,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:00,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 06:55:00,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228948906] [2020-12-23 06:55:00,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:55:00,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:00,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:55:00,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:55:00,086 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 26 states. [2020-12-23 06:55:00,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:00,464 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-12-23 06:55:00,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:55:00,465 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 47 [2020-12-23 06:55:00,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:00,465 INFO L225 Difference]: With dead ends: 86 [2020-12-23 06:55:00,465 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 06:55:00,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=1056, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:55:00,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 06:55:00,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-23 06:55:00,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 06:55:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-12-23 06:55:00,472 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2020-12-23 06:55:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:00,473 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-12-23 06:55:00,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:55:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-12-23 06:55:00,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 06:55:00,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:00,474 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:00,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 06:55:00,688 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:00,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:00,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1726078956, now seen corresponding path program 20 times [2020-12-23 06:55:00,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:00,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134129481] [2020-12-23 06:55:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:00,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134129481] [2020-12-23 06:55:00,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453909325] [2020-12-23 06:55:00,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:00,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:55:00,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:00,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:55:00,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:00,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:00,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-23 06:55:00,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553135749] [2020-12-23 06:55:00,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:55:00,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:00,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:55:00,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:55:00,993 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2020-12-23 06:55:01,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:01,258 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-12-23 06:55:01,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:55:01,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-12-23 06:55:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:01,259 INFO L225 Difference]: With dead ends: 60 [2020-12-23 06:55:01,259 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 06:55:01,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:55:01,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 06:55:01,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-12-23 06:55:01,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 06:55:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-23 06:55:01,266 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2020-12-23 06:55:01,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:01,266 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-23 06:55:01,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:55:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-23 06:55:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 06:55:01,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:01,267 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:01,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:55:01,481 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:01,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:01,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2020436531, now seen corresponding path program 21 times [2020-12-23 06:55:01,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:01,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529268212] [2020-12-23 06:55:01,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:01,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529268212] [2020-12-23 06:55:01,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095574525] [2020-12-23 06:55:01,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:01,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 06:55:01,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:01,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 06:55:01,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:01,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:01,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 06:55:01,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741449791] [2020-12-23 06:55:01,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:55:01,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:01,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:55:01,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:55:01,968 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 28 states. [2020-12-23 06:55:02,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:02,462 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-12-23 06:55:02,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:55:02,463 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 51 [2020-12-23 06:55:02,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:02,464 INFO L225 Difference]: With dead ends: 93 [2020-12-23 06:55:02,464 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 06:55:02,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:55:02,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 06:55:02,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-23 06:55:02,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 06:55:02,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-12-23 06:55:02,470 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 51 [2020-12-23 06:55:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:02,470 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-12-23 06:55:02,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:55:02,470 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-12-23 06:55:02,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 06:55:02,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:02,470 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:02,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:02,672 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:02,673 INFO L82 PathProgramCache]: Analyzing trace with hash -318652536, now seen corresponding path program 22 times [2020-12-23 06:55:02,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:02,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265976841] [2020-12-23 06:55:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:02,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265976841] [2020-12-23 06:55:02,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723128122] [2020-12-23 06:55:02,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:02,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:55:02,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:02,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:55:02,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:03,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:03,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-23 06:55:03,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564535137] [2020-12-23 06:55:03,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:55:03,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:03,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:55:03,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:55:03,007 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2020-12-23 06:55:03,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:03,321 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-12-23 06:55:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:55:03,322 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-12-23 06:55:03,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:03,323 INFO L225 Difference]: With dead ends: 64 [2020-12-23 06:55:03,323 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 06:55:03,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:55:03,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 06:55:03,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-12-23 06:55:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 06:55:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-12-23 06:55:03,328 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2020-12-23 06:55:03,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:03,329 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-12-23 06:55:03,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:55:03,329 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-12-23 06:55:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 06:55:03,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:03,329 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:03,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 06:55:03,530 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:03,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:03,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1095155535, now seen corresponding path program 23 times [2020-12-23 06:55:03,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:03,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28496407] [2020-12-23 06:55:03,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:03,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28496407] [2020-12-23 06:55:03,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591191387] [2020-12-23 06:55:03,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:04,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-23 06:55:04,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:04,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 06:55:04,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:04,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:04,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 06:55:04,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878855111] [2020-12-23 06:55:04,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:55:04,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:04,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:55:04,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:55:04,119 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 30 states. [2020-12-23 06:55:04,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:04,704 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-12-23 06:55:04,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:55:04,705 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 55 [2020-12-23 06:55:04,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:04,705 INFO L225 Difference]: With dead ends: 100 [2020-12-23 06:55:04,705 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 06:55:04,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=1428, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:55:04,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 06:55:04,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 06:55:04,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 06:55:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-12-23 06:55:04,714 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2020-12-23 06:55:04,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:04,715 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-12-23 06:55:04,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:55:04,715 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-12-23 06:55:04,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 06:55:04,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:04,716 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:04,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:04,924 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:04,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:04,925 INFO L82 PathProgramCache]: Analyzing trace with hash 548869356, now seen corresponding path program 24 times [2020-12-23 06:55:04,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:04,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649398962] [2020-12-23 06:55:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:05,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649398962] [2020-12-23 06:55:05,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935031096] [2020-12-23 06:55:05,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:05,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 06:55:05,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:05,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:55:05,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:05,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:05,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-23 06:55:05,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620412097] [2020-12-23 06:55:05,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:55:05,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:05,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:55:05,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:55:05,292 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-12-23 06:55:05,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:05,574 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2020-12-23 06:55:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:55:05,575 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2020-12-23 06:55:05,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:05,576 INFO L225 Difference]: With dead ends: 68 [2020-12-23 06:55:05,576 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 06:55:05,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=398, Invalid=724, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:55:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 06:55:05,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-12-23 06:55:05,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 06:55:05,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-12-23 06:55:05,584 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2020-12-23 06:55:05,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:05,584 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-12-23 06:55:05,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:55:05,584 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-12-23 06:55:05,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 06:55:05,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:05,585 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:05,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 06:55:05,799 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:05,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:05,799 INFO L82 PathProgramCache]: Analyzing trace with hash 431309005, now seen corresponding path program 25 times [2020-12-23 06:55:05,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:05,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350259990] [2020-12-23 06:55:05,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:06,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350259990] [2020-12-23 06:55:06,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979864705] [2020-12-23 06:55:06,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:06,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:55:06,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:06,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:06,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 06:55:06,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538425971] [2020-12-23 06:55:06,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:55:06,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:06,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:55:06,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:55:06,437 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 32 states. [2020-12-23 06:55:06,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:06,945 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2020-12-23 06:55:06,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:55:06,945 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 59 [2020-12-23 06:55:06,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:06,946 INFO L225 Difference]: With dead ends: 107 [2020-12-23 06:55:06,946 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 06:55:06,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=527, Invalid=1635, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:55:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 06:55:06,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-12-23 06:55:06,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 06:55:06,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-12-23 06:55:06,953 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2020-12-23 06:55:06,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:06,954 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-12-23 06:55:06,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:55:06,954 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-12-23 06:55:06,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 06:55:06,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:06,955 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:07,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:55:07,169 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:07,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:07,170 INFO L82 PathProgramCache]: Analyzing trace with hash -471302264, now seen corresponding path program 26 times [2020-12-23 06:55:07,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:07,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247411576] [2020-12-23 06:55:07,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:07,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247411576] [2020-12-23 06:55:07,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717276184] [2020-12-23 06:55:07,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:07,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:55:07,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:07,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 06:55:07,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:07,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:07,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-23 06:55:07,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469366757] [2020-12-23 06:55:07,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:55:07,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:07,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:55:07,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:55:07,555 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2020-12-23 06:55:07,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:07,894 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2020-12-23 06:55:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 06:55:07,895 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-12-23 06:55:07,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:07,896 INFO L225 Difference]: With dead ends: 72 [2020-12-23 06:55:07,896 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 06:55:07,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:55:07,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 06:55:07,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-12-23 06:55:07,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 06:55:07,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-12-23 06:55:07,904 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2020-12-23 06:55:07,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:07,904 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-12-23 06:55:07,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:55:07,904 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-12-23 06:55:07,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 06:55:07,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:07,905 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:08,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:55:08,119 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:08,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:08,119 INFO L82 PathProgramCache]: Analyzing trace with hash -312835919, now seen corresponding path program 27 times [2020-12-23 06:55:08,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:08,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372410875] [2020-12-23 06:55:08,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:08,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372410875] [2020-12-23 06:55:08,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107562504] [2020-12-23 06:55:08,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:08,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-23 06:55:08,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:08,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 06:55:08,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:08,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:08,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 06:55:08,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085280911] [2020-12-23 06:55:08,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:55:08,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:08,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:55:08,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:55:08,787 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 34 states. [2020-12-23 06:55:09,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:09,459 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-12-23 06:55:09,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:55:09,460 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 63 [2020-12-23 06:55:09,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:09,460 INFO L225 Difference]: With dead ends: 114 [2020-12-23 06:55:09,461 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 06:55:09,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=594, Invalid=1856, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:55:09,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 06:55:09,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-12-23 06:55:09,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 06:55:09,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-12-23 06:55:09,469 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 63 [2020-12-23 06:55:09,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:09,469 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-12-23 06:55:09,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:55:09,469 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-12-23 06:55:09,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 06:55:09,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:09,470 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:09,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:55:09,674 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:09,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:09,675 INFO L82 PathProgramCache]: Analyzing trace with hash -636884500, now seen corresponding path program 28 times [2020-12-23 06:55:09,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:09,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123651213] [2020-12-23 06:55:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 105 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:09,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123651213] [2020-12-23 06:55:09,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858052727] [2020-12-23 06:55:09,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:10,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:55:10,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:10,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 06:55:10,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:10,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:10,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-12-23 06:55:10,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364778178] [2020-12-23 06:55:10,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:55:10,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:10,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:55:10,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:55:10,112 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2020-12-23 06:55:10,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:10,522 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-12-23 06:55:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:55:10,522 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2020-12-23 06:55:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:10,523 INFO L225 Difference]: With dead ends: 76 [2020-12-23 06:55:10,523 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 06:55:10,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=501, Invalid=905, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:55:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 06:55:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2020-12-23 06:55:10,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 06:55:10,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-12-23 06:55:10,532 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2020-12-23 06:55:10,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:10,533 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-12-23 06:55:10,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:55:10,533 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-12-23 06:55:10,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 06:55:10,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:10,533 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:10,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:10,744 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:10,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:10,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1744194509, now seen corresponding path program 29 times [2020-12-23 06:55:10,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:10,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176232487] [2020-12-23 06:55:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:11,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176232487] [2020-12-23 06:55:11,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954631973] [2020-12-23 06:55:11,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:11,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-23 06:55:11,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:11,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:55:11,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:11,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:11,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 06:55:11,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213331387] [2020-12-23 06:55:11,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 06:55:11,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 06:55:11,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:55:11,495 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 36 states. [2020-12-23 06:55:12,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:12,269 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2020-12-23 06:55:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 06:55:12,269 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 67 [2020-12-23 06:55:12,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:12,270 INFO L225 Difference]: With dead ends: 121 [2020-12-23 06:55:12,270 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 06:55:12,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:55:12,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 06:55:12,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-12-23 06:55:12,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 06:55:12,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-12-23 06:55:12,280 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 67 [2020-12-23 06:55:12,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:12,280 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-12-23 06:55:12,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 06:55:12,280 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-12-23 06:55:12,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 06:55:12,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:12,281 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:12,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:12,497 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:12,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:12,497 INFO L82 PathProgramCache]: Analyzing trace with hash 805871496, now seen corresponding path program 30 times [2020-12-23 06:55:12,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:12,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39961432] [2020-12-23 06:55:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 120 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:12,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39961432] [2020-12-23 06:55:12,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802794498] [2020-12-23 06:55:12,733 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 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 06:55:12,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-23 06:55:12,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:12,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:55:12,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:12,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:12,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-12-23 06:55:12,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712296654] [2020-12-23 06:55:12,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:55:12,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:12,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:55:12,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:55:12,940 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2020-12-23 06:55:13,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:13,292 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2020-12-23 06:55:13,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:55:13,293 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2020-12-23 06:55:13,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:13,294 INFO L225 Difference]: With dead ends: 80 [2020-12-23 06:55:13,294 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 06:55:13,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=557, Invalid=1003, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:55:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 06:55:13,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-12-23 06:55:13,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 06:55:13,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-12-23 06:55:13,308 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2020-12-23 06:55:13,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:13,309 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-12-23 06:55:13,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:55:13,309 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-12-23 06:55:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 06:55:13,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:13,309 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:13,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:13,523 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:13,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:13,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1144627023, now seen corresponding path program 31 times [2020-12-23 06:55:13,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:13,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891983564] [2020-12-23 06:55:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:14,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891983564] [2020-12-23 06:55:14,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035480868] [2020-12-23 06:55:14,181 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 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 06:55:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:14,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 06:55:14,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:14,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:14,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 06:55:14,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640042714] [2020-12-23 06:55:14,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:55:14,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:14,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:55:14,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:55:14,363 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 38 states. [2020-12-23 06:55:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:15,115 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2020-12-23 06:55:15,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:55:15,115 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 71 [2020-12-23 06:55:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:15,116 INFO L225 Difference]: With dead ends: 128 [2020-12-23 06:55:15,116 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 06:55:15,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=740, Invalid=2340, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:55:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 06:55:15,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-23 06:55:15,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 06:55:15,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-12-23 06:55:15,126 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2020-12-23 06:55:15,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:15,126 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-12-23 06:55:15,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:55:15,127 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-12-23 06:55:15,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 06:55:15,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:15,127 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:15,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 06:55:15,334 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:15,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:15,335 INFO L82 PathProgramCache]: Analyzing trace with hash -960340244, now seen corresponding path program 32 times [2020-12-23 06:55:15,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:15,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940465561] [2020-12-23 06:55:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 136 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:15,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940465561] [2020-12-23 06:55:15,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794634640] [2020-12-23 06:55:15,599 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 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 06:55:15,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:55:15,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:15,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:55:15,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:15,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:15,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-12-23 06:55:15,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252768747] [2020-12-23 06:55:15,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:55:15,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:15,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:55:15,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:55:15,809 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2020-12-23 06:55:16,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:16,248 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2020-12-23 06:55:16,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:55:16,249 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2020-12-23 06:55:16,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:16,250 INFO L225 Difference]: With dead ends: 84 [2020-12-23 06:55:16,250 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 06:55:16,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=616, Invalid=1106, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:55:16,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 06:55:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2020-12-23 06:55:16,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 06:55:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-12-23 06:55:16,260 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2020-12-23 06:55:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:16,261 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-12-23 06:55:16,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:55:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-12-23 06:55:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 06:55:16,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:16,261 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:16,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:16,476 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:16,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:16,477 INFO L82 PathProgramCache]: Analyzing trace with hash -714230067, now seen corresponding path program 33 times [2020-12-23 06:55:16,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:16,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627217330] [2020-12-23 06:55:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:17,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627217330] [2020-12-23 06:55:17,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791607739] [2020-12-23 06:55:17,181 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 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 06:55:17,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-23 06:55:17,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:17,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 06:55:17,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:17,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:17,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 06:55:17,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374999864] [2020-12-23 06:55:17,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:55:17,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:17,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:55:17,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:55:17,393 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 40 states. [2020-12-23 06:55:18,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:18,271 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2020-12-23 06:55:18,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:55:18,271 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 75 [2020-12-23 06:55:18,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:18,272 INFO L225 Difference]: With dead ends: 135 [2020-12-23 06:55:18,272 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 06:55:18,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=819, Invalid=2603, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:55:18,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 06:55:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-12-23 06:55:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 06:55:18,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-12-23 06:55:18,282 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 75 [2020-12-23 06:55:18,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:18,282 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-12-23 06:55:18,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:55:18,282 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-12-23 06:55:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 06:55:18,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:18,283 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:18,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 06:55:18,484 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:18,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:18,485 INFO L82 PathProgramCache]: Analyzing trace with hash -377872504, now seen corresponding path program 34 times [2020-12-23 06:55:18,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:18,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428866799] [2020-12-23 06:55:18,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 153 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:18,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428866799] [2020-12-23 06:55:18,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591196052] [2020-12-23 06:55:18,776 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 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 06:55:18,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:55:18,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:18,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 06:55:18,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:18,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:18,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-12-23 06:55:18,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642142178] [2020-12-23 06:55:18,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:55:18,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:18,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:55:18,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:55:18,969 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2020-12-23 06:55:19,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:19,408 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-12-23 06:55:19,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:55:19,408 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2020-12-23 06:55:19,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:19,409 INFO L225 Difference]: With dead ends: 88 [2020-12-23 06:55:19,409 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 06:55:19,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1214, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:55:19,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 06:55:19,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2020-12-23 06:55:19,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 06:55:19,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-12-23 06:55:19,418 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2020-12-23 06:55:19,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:19,418 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-12-23 06:55:19,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:55:19,418 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-12-23 06:55:19,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 06:55:19,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:19,419 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:19,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:19,620 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:19,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:19,620 INFO L82 PathProgramCache]: Analyzing trace with hash -85663567, now seen corresponding path program 35 times [2020-12-23 06:55:19,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:19,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960109882] [2020-12-23 06:55:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:20,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960109882] [2020-12-23 06:55:20,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089339491] [2020-12-23 06:55:20,382 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 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 06:55:20,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-23 06:55:20,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:20,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:55:20,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:20,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:20,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 06:55:20,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836237244] [2020-12-23 06:55:20,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 06:55:20,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:20,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 06:55:20,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:55:20,604 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 42 states. [2020-12-23 06:55:21,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:21,474 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-12-23 06:55:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:55:21,475 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 79 [2020-12-23 06:55:21,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:21,476 INFO L225 Difference]: With dead ends: 142 [2020-12-23 06:55:21,476 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 06:55:21,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=902, Invalid=2880, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:55:21,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 06:55:21,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-23 06:55:21,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 06:55:21,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-12-23 06:55:21,487 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 79 [2020-12-23 06:55:21,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:21,487 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-12-23 06:55:21,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 06:55:21,487 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-12-23 06:55:21,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 06:55:21,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:21,488 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:21,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 06:55:21,702 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:21,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:21,703 INFO L82 PathProgramCache]: Analyzing trace with hash -322407444, now seen corresponding path program 36 times [2020-12-23 06:55:21,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:21,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635606766] [2020-12-23 06:55:21,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 171 proven. 514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:22,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635606766] [2020-12-23 06:55:22,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450722836] [2020-12-23 06:55:22,087 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 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 06:55:22,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 06:55:22,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:22,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:55:22,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:22,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:22,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-12-23 06:55:22,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001108480] [2020-12-23 06:55:22,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:55:22,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:22,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:55:22,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:55:22,421 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2020-12-23 06:55:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:22,878 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2020-12-23 06:55:22,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 06:55:22,880 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2020-12-23 06:55:22,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:22,881 INFO L225 Difference]: With dead ends: 92 [2020-12-23 06:55:22,881 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 06:55:22,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=743, Invalid=1327, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:55:22,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 06:55:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-12-23 06:55:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 06:55:22,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-12-23 06:55:22,893 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 80 [2020-12-23 06:55:22,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:22,893 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-12-23 06:55:22,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:55:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-12-23 06:55:22,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 06:55:22,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:22,894 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:23,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 06:55:23,106 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:23,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:23,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1288470067, now seen corresponding path program 37 times [2020-12-23 06:55:23,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:23,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648095134] [2020-12-23 06:55:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:23,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648095134] [2020-12-23 06:55:23,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869562458] [2020-12-23 06:55:23,946 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 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 06:55:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:24,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:55:24,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:24,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:24,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 06:55:24,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743119640] [2020-12-23 06:55:24,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 06:55:24,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 06:55:24,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:55:24,156 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 44 states. [2020-12-23 06:55:25,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:25,232 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2020-12-23 06:55:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:55:25,232 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 83 [2020-12-23 06:55:25,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:25,233 INFO L225 Difference]: With dead ends: 149 [2020-12-23 06:55:25,233 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 06:55:25,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=989, Invalid=3171, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:55:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 06:55:25,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-12-23 06:55:25,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 06:55:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-12-23 06:55:25,245 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2020-12-23 06:55:25,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:25,246 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-12-23 06:55:25,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 06:55:25,246 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-12-23 06:55:25,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 06:55:25,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:25,246 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:25,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 06:55:25,459 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:25,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:25,460 INFO L82 PathProgramCache]: Analyzing trace with hash 374669192, now seen corresponding path program 38 times [2020-12-23 06:55:25,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:25,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304640980] [2020-12-23 06:55:25,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 190 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:25,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304640980] [2020-12-23 06:55:25,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647928651] [2020-12-23 06:55:25,811 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 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 06:55:25,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:55:25,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:25,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:55:25,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:26,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:26,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-12-23 06:55:26,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678692185] [2020-12-23 06:55:26,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:55:26,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:26,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:55:26,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:55:26,018 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2020-12-23 06:55:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:26,511 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2020-12-23 06:55:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 06:55:26,512 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2020-12-23 06:55:26,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:26,513 INFO L225 Difference]: With dead ends: 96 [2020-12-23 06:55:26,513 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 06:55:26,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=811, Invalid=1445, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:55:26,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 06:55:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-12-23 06:55:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 06:55:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-12-23 06:55:26,536 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 84 [2020-12-23 06:55:26,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:26,537 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-12-23 06:55:26,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:55:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-12-23 06:55:26,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 06:55:26,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:26,538 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:26,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 06:55:26,753 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:26,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:26,753 INFO L82 PathProgramCache]: Analyzing trace with hash -845283151, now seen corresponding path program 39 times [2020-12-23 06:55:26,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:26,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328978776] [2020-12-23 06:55:26,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:27,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328978776] [2020-12-23 06:55:27,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126546288] [2020-12-23 06:55:27,677 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 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 06:55:27,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-23 06:55:27,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:27,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 06:55:27,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:27,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:27,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-23 06:55:27,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103160833] [2020-12-23 06:55:27,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 06:55:27,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:27,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 06:55:27,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:55:27,915 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 46 states. [2020-12-23 06:55:29,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:29,143 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2020-12-23 06:55:29,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 06:55:29,143 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 87 [2020-12-23 06:55:29,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:29,144 INFO L225 Difference]: With dead ends: 156 [2020-12-23 06:55:29,144 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 06:55:29,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1080, Invalid=3476, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:55:29,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 06:55:29,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-12-23 06:55:29,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 06:55:29,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-12-23 06:55:29,154 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 87 [2020-12-23 06:55:29,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:29,154 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-12-23 06:55:29,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 06:55:29,154 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-12-23 06:55:29,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 06:55:29,154 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:29,155 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:29,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:29,356 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:29,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:29,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1543231252, now seen corresponding path program 40 times [2020-12-23 06:55:29,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:29,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915851383] [2020-12-23 06:55:29,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 210 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:29,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915851383] [2020-12-23 06:55:29,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932840732] [2020-12-23 06:55:29,719 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 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 06:55:29,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:55:29,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:29,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 06:55:29,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:29,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:29,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-12-23 06:55:29,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960107217] [2020-12-23 06:55:29,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:55:29,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:29,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:55:29,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:55:29,944 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2020-12-23 06:55:30,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:30,512 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2020-12-23 06:55:30,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 06:55:30,512 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2020-12-23 06:55:30,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:30,513 INFO L225 Difference]: With dead ends: 100 [2020-12-23 06:55:30,514 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 06:55:30,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=882, Invalid=1568, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:55:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 06:55:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2020-12-23 06:55:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 06:55:30,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-12-23 06:55:30,523 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2020-12-23 06:55:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:30,523 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-12-23 06:55:30,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:55:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-12-23 06:55:30,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 06:55:30,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:30,524 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:30,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 06:55:30,732 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:30,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:30,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1067471667, now seen corresponding path program 41 times [2020-12-23 06:55:30,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:30,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038800794] [2020-12-23 06:55:30,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:31,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038800794] [2020-12-23 06:55:31,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609799743] [2020-12-23 06:55:31,739 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 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 06:55:31,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-12-23 06:55:31,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:31,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:55:31,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:31,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:31,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-23 06:55:31,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161964463] [2020-12-23 06:55:31,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 06:55:31,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:31,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 06:55:31,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:55:31,979 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 48 states. [2020-12-23 06:55:33,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:33,322 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2020-12-23 06:55:33,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 06:55:33,322 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 91 [2020-12-23 06:55:33,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:33,324 INFO L225 Difference]: With dead ends: 163 [2020-12-23 06:55:33,324 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 06:55:33,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1175, Invalid=3795, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:55:33,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 06:55:33,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-12-23 06:55:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 06:55:33,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-12-23 06:55:33,336 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2020-12-23 06:55:33,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:33,336 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-12-23 06:55:33,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 06:55:33,336 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-12-23 06:55:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-23 06:55:33,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:33,337 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:33,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:33,544 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:33,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:33,545 INFO L82 PathProgramCache]: Analyzing trace with hash 716259208, now seen corresponding path program 42 times [2020-12-23 06:55:33,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:33,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149887623] [2020-12-23 06:55:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 231 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:33,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149887623] [2020-12-23 06:55:33,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737947513] [2020-12-23 06:55:33,961 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 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 06:55:34,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-12-23 06:55:34,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:34,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 06:55:34,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:34,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:34,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-12-23 06:55:34,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137347857] [2020-12-23 06:55:34,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:55:34,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:34,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:55:34,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:55:34,213 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2020-12-23 06:55:34,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:34,815 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2020-12-23 06:55:34,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 06:55:34,816 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2020-12-23 06:55:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:34,817 INFO L225 Difference]: With dead ends: 104 [2020-12-23 06:55:34,817 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 06:55:34,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=956, Invalid=1696, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:55:34,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 06:55:34,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2020-12-23 06:55:34,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 06:55:34,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-12-23 06:55:34,837 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2020-12-23 06:55:34,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:34,837 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-12-23 06:55:34,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:55:34,837 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-12-23 06:55:34,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-23 06:55:34,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:34,838 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:35,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:35,053 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:35,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:35,054 INFO L82 PathProgramCache]: Analyzing trace with hash 685359281, now seen corresponding path program 43 times [2020-12-23 06:55:35,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:35,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062366275] [2020-12-23 06:55:35,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:36,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062366275] [2020-12-23 06:55:36,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362175394] [2020-12-23 06:55:36,082 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 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 06:55:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:36,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 06:55:36,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:36,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:36,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-23 06:55:36,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025413356] [2020-12-23 06:55:36,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 06:55:36,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:36,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 06:55:36,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:55:36,315 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 50 states. [2020-12-23 06:55:37,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:37,256 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2020-12-23 06:55:37,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 06:55:37,256 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 95 [2020-12-23 06:55:37,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:37,257 INFO L225 Difference]: With dead ends: 170 [2020-12-23 06:55:37,258 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 06:55:37,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1274, Invalid=4128, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:55:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 06:55:37,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-23 06:55:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 06:55:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-12-23 06:55:37,267 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 95 [2020-12-23 06:55:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:37,267 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-12-23 06:55:37,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 06:55:37,267 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-12-23 06:55:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 06:55:37,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:37,268 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:37,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 06:55:37,469 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:37,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:37,470 INFO L82 PathProgramCache]: Analyzing trace with hash 375225836, now seen corresponding path program 44 times [2020-12-23 06:55:37,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:37,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084278669] [2020-12-23 06:55:37,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 253 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:37,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084278669] [2020-12-23 06:55:37,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913354604] [2020-12-23 06:55:37,940 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 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 06:55:38,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:55:38,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:38,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 06:55:38,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:38,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:38,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2020-12-23 06:55:38,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841735273] [2020-12-23 06:55:38,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:55:38,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:38,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:55:38,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:55:38,201 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2020-12-23 06:55:38,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:38,847 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2020-12-23 06:55:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 06:55:38,848 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2020-12-23 06:55:38,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:38,849 INFO L225 Difference]: With dead ends: 108 [2020-12-23 06:55:38,849 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 06:55:38,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1033, Invalid=1829, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:55:38,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 06:55:38,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2020-12-23 06:55:38,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 06:55:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-12-23 06:55:38,862 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 96 [2020-12-23 06:55:38,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:38,863 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-12-23 06:55:38,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:55:38,863 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-12-23 06:55:38,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 06:55:38,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:38,864 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:39,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 06:55:39,077 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:39,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:39,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1442170931, now seen corresponding path program 45 times [2020-12-23 06:55:39,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:39,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19199473] [2020-12-23 06:55:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:40,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19199473] [2020-12-23 06:55:40,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322592719] [2020-12-23 06:55:40,289 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 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 06:55:40,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-23 06:55:40,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:40,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 06:55:40,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:40,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:40,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-23 06:55:40,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633990086] [2020-12-23 06:55:40,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 06:55:40,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:40,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 06:55:40,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:55:40,566 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 52 states. [2020-12-23 06:55:42,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:42,046 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2020-12-23 06:55:42,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 06:55:42,046 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 99 [2020-12-23 06:55:42,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:42,048 INFO L225 Difference]: With dead ends: 177 [2020-12-23 06:55:42,048 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 06:55:42,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1377, Invalid=4475, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 06:55:42,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 06:55:42,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-12-23 06:55:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 06:55:42,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-12-23 06:55:42,064 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 99 [2020-12-23 06:55:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:42,064 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-12-23 06:55:42,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 06:55:42,064 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-12-23 06:55:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 06:55:42,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:42,065 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:42,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 06:55:42,281 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:42,282 INFO L82 PathProgramCache]: Analyzing trace with hash -2002329720, now seen corresponding path program 46 times [2020-12-23 06:55:42,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:42,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223691720] [2020-12-23 06:55:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 276 proven. 829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:42,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223691720] [2020-12-23 06:55:42,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430378460] [2020-12-23 06:55:42,762 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 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 06:55:42,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:55:42,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:42,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:55:42,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:43,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:43,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-12-23 06:55:43,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790226490] [2020-12-23 06:55:43,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:55:43,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:43,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:55:43,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:55:43,036 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2020-12-23 06:55:43,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:43,710 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2020-12-23 06:55:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 06:55:43,711 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2020-12-23 06:55:43,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:43,712 INFO L225 Difference]: With dead ends: 112 [2020-12-23 06:55:43,712 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 06:55:43,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1113, Invalid=1967, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:55:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 06:55:43,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2020-12-23 06:55:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 06:55:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-12-23 06:55:43,729 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 100 [2020-12-23 06:55:43,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:43,729 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-12-23 06:55:43,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:55:43,730 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-12-23 06:55:43,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 06:55:43,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:43,730 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:43,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:43,944 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:43,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:43,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1400905905, now seen corresponding path program 47 times [2020-12-23 06:55:43,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:43,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848487119] [2020-12-23 06:55:43,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:45,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848487119] [2020-12-23 06:55:45,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613550797] [2020-12-23 06:55:45,270 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 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 06:55:45,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-23 06:55:45,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:45,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 06:55:45,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:45,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:45,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-23 06:55:45,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041250376] [2020-12-23 06:55:45,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 06:55:45,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:45,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 06:55:45,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:55:45,550 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 54 states. [2020-12-23 06:55:47,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:47,267 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2020-12-23 06:55:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 06:55:47,267 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 103 [2020-12-23 06:55:47,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:47,268 INFO L225 Difference]: With dead ends: 184 [2020-12-23 06:55:47,268 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 06:55:47,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1484, Invalid=4836, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:55:47,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 06:55:47,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-12-23 06:55:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 06:55:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-12-23 06:55:47,280 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 103 [2020-12-23 06:55:47,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:47,280 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-12-23 06:55:47,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 06:55:47,281 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-12-23 06:55:47,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 06:55:47,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:47,281 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:47,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 06:55:47,482 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:47,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1078168852, now seen corresponding path program 48 times [2020-12-23 06:55:47,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:47,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853700081] [2020-12-23 06:55:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 300 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:48,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853700081] [2020-12-23 06:55:48,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928274098] [2020-12-23 06:55:48,008 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 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 06:55:48,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 06:55:48,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:48,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 06:55:48,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:48,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:48,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-12-23 06:55:48,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151368298] [2020-12-23 06:55:48,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:55:48,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:48,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:55:48,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:55:48,311 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2020-12-23 06:55:49,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:49,003 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2020-12-23 06:55:49,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 06:55:49,004 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2020-12-23 06:55:49,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:49,005 INFO L225 Difference]: With dead ends: 116 [2020-12-23 06:55:49,005 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 06:55:49,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1196, Invalid=2110, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:55:49,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 06:55:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2020-12-23 06:55:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 06:55:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-12-23 06:55:49,022 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2020-12-23 06:55:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:49,022 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-12-23 06:55:49,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:55:49,023 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-12-23 06:55:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 06:55:49,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:49,023 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:49,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 06:55:49,237 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:49,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:49,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1958010163, now seen corresponding path program 49 times [2020-12-23 06:55:49,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:49,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738499769] [2020-12-23 06:55:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:50,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738499769] [2020-12-23 06:55:50,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150550301] [2020-12-23 06:55:50,656 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 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 06:55:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:50,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 06:55:50,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:50,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:50,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-23 06:55:50,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653274086] [2020-12-23 06:55:50,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 06:55:50,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:50,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 06:55:50,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:55:50,925 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 56 states. [2020-12-23 06:55:52,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:52,781 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2020-12-23 06:55:52,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 06:55:52,782 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 107 [2020-12-23 06:55:52,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:52,783 INFO L225 Difference]: With dead ends: 191 [2020-12-23 06:55:52,783 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 06:55:52,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1595, Invalid=5211, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 06:55:52,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 06:55:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-12-23 06:55:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 06:55:52,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-12-23 06:55:52,800 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 107 [2020-12-23 06:55:52,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:52,800 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-12-23 06:55:52,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 06:55:52,800 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-12-23 06:55:52,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-23 06:55:52,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:52,801 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:53,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:53,016 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:53,017 INFO L82 PathProgramCache]: Analyzing trace with hash 5103496, now seen corresponding path program 50 times [2020-12-23 06:55:53,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:53,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157479978] [2020-12-23 06:55:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 325 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:53,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157479978] [2020-12-23 06:55:53,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760558574] [2020-12-23 06:55:53,538 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 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 06:55:53,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:55:53,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:53,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 06:55:53,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:53,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:53,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2020-12-23 06:55:53,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056002156] [2020-12-23 06:55:53,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:55:53,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:53,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:55:53,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:55:53,820 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2020-12-23 06:55:54,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:54,534 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2020-12-23 06:55:54,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 06:55:54,535 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2020-12-23 06:55:54,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:54,536 INFO L225 Difference]: With dead ends: 120 [2020-12-23 06:55:54,536 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 06:55:54,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1282, Invalid=2258, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:55:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 06:55:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2020-12-23 06:55:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 06:55:54,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-12-23 06:55:54,549 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 108 [2020-12-23 06:55:54,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:54,550 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-12-23 06:55:54,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:55:54,550 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-12-23 06:55:54,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 06:55:54,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:54,550 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:54,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-23 06:55:54,752 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:54,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:54,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1719214257, now seen corresponding path program 51 times [2020-12-23 06:55:54,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:54,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729161763] [2020-12-23 06:55:54,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:56,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729161763] [2020-12-23 06:55:56,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784222025] [2020-12-23 06:55:56,270 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 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 06:55:56,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2020-12-23 06:55:56,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:56,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 06:55:56,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:56,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:56,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-23 06:55:56,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858497878] [2020-12-23 06:55:56,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 06:55:56,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:56,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 06:55:56,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:55:56,576 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 58 states. [2020-12-23 06:55:58,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:58,568 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2020-12-23 06:55:58,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 06:55:58,568 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 111 [2020-12-23 06:55:58,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:58,569 INFO L225 Difference]: With dead ends: 198 [2020-12-23 06:55:58,569 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 06:55:58,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1710, Invalid=5600, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 06:55:58,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 06:55:58,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-12-23 06:55:58,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 06:55:58,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-12-23 06:55:58,589 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 111 [2020-12-23 06:55:58,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:58,589 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-12-23 06:55:58,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 06:55:58,589 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-12-23 06:55:58,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 06:55:58,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:58,590 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:58,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:58,805 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:58,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:58,805 INFO L82 PathProgramCache]: Analyzing trace with hash -301398036, now seen corresponding path program 52 times [2020-12-23 06:55:58,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:58,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431698034] [2020-12-23 06:55:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 351 proven. 1054 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:59,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431698034] [2020-12-23 06:55:59,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640927527] [2020-12-23 06:55:59,371 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 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 06:55:59,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:55:59,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:59,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 06:55:59,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:59,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:59,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2020-12-23 06:55:59,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998198612] [2020-12-23 06:55:59,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:55:59,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:59,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:55:59,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:55:59,653 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2020-12-23 06:56:00,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:00,480 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2020-12-23 06:56:00,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 06:56:00,481 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2020-12-23 06:56:00,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:00,482 INFO L225 Difference]: With dead ends: 124 [2020-12-23 06:56:00,482 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 06:56:00,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1371, Invalid=2411, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:56:00,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 06:56:00,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2020-12-23 06:56:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 06:56:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2020-12-23 06:56:00,501 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 112 [2020-12-23 06:56:00,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:00,501 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2020-12-23 06:56:00,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:56:00,501 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2020-12-23 06:56:00,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-23 06:56:00,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:00,502 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:00,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 06:56:00,710 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:00,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:00,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1832545741, now seen corresponding path program 53 times [2020-12-23 06:56:00,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:00,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205810455] [2020-12-23 06:56:00,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:02,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205810455] [2020-12-23 06:56:02,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929671699] [2020-12-23 06:56:02,304 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 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 06:56:02,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2020-12-23 06:56:02,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:02,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 06:56:02,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:02,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:02,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-23 06:56:02,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898105889] [2020-12-23 06:56:02,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 06:56:02,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:02,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 06:56:02,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:56:02,600 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 60 states. [2020-12-23 06:56:04,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:04,771 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2020-12-23 06:56:04,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 06:56:04,771 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 115 [2020-12-23 06:56:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:04,774 INFO L225 Difference]: With dead ends: 205 [2020-12-23 06:56:04,774 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 06:56:04,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1829, Invalid=6003, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 06:56:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 06:56:04,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-12-23 06:56:04,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 06:56:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-12-23 06:56:04,796 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 115 [2020-12-23 06:56:04,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:04,796 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-12-23 06:56:04,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 06:56:04,796 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-12-23 06:56:04,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 06:56:04,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:04,797 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:05,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 06:56:05,011 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:05,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:05,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1337868168, now seen corresponding path program 54 times [2020-12-23 06:56:05,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:05,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92268541] [2020-12-23 06:56:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 378 proven. 1135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:05,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92268541] [2020-12-23 06:56:05,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937298659] [2020-12-23 06:56:05,691 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:05,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2020-12-23 06:56:05,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:05,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 06:56:05,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:06,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:06,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2020-12-23 06:56:06,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997584966] [2020-12-23 06:56:06,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:56:06,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:06,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:56:06,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:56:06,006 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2020-12-23 06:56:06,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:06,811 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2020-12-23 06:56:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 06:56:06,812 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2020-12-23 06:56:06,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:06,812 INFO L225 Difference]: With dead ends: 128 [2020-12-23 06:56:06,813 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 06:56:06,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1463, Invalid=2569, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:56:06,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 06:56:06,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2020-12-23 06:56:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 06:56:06,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2020-12-23 06:56:06,832 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2020-12-23 06:56:06,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:06,833 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2020-12-23 06:56:06,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:56:06,833 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2020-12-23 06:56:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 06:56:06,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:06,834 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:07,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:07,048 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:07,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:07,049 INFO L82 PathProgramCache]: Analyzing trace with hash -861093711, now seen corresponding path program 55 times [2020-12-23 06:56:07,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:07,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120920255] [2020-12-23 06:56:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:08,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120920255] [2020-12-23 06:56:08,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292490537] [2020-12-23 06:56:08,826 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:08,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 06:56:08,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:09,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:09,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-23 06:56:09,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179663913] [2020-12-23 06:56:09,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 06:56:09,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:09,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 06:56:09,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:56:09,107 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 62 states. [2020-12-23 06:56:11,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:11,326 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-12-23 06:56:11,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 06:56:11,327 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 119 [2020-12-23 06:56:11,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:11,327 INFO L225 Difference]: With dead ends: 212 [2020-12-23 06:56:11,327 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 06:56:11,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1952, Invalid=6420, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 06:56:11,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 06:56:11,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-12-23 06:56:11,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-23 06:56:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-12-23 06:56:11,350 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 119 [2020-12-23 06:56:11,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:11,350 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-12-23 06:56:11,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 06:56:11,350 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-12-23 06:56:11,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-23 06:56:11,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:11,351 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:11,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 06:56:11,565 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:11,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:11,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1093352684, now seen corresponding path program 56 times [2020-12-23 06:56:11,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:11,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315386422] [2020-12-23 06:56:11,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 406 proven. 1219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:12,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315386422] [2020-12-23 06:56:12,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101881851] [2020-12-23 06:56:12,243 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:12,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:56:12,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:12,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 06:56:12,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:12,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:12,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2020-12-23 06:56:12,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604301439] [2020-12-23 06:56:12,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:56:12,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:12,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:56:12,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:56:12,547 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2020-12-23 06:56:13,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:13,311 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2020-12-23 06:56:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 06:56:13,311 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2020-12-23 06:56:13,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:13,312 INFO L225 Difference]: With dead ends: 132 [2020-12-23 06:56:13,312 INFO L226 Difference]: Without dead ends: 130 [2020-12-23 06:56:13,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1558, Invalid=2732, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:56:13,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-23 06:56:13,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2020-12-23 06:56:13,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-23 06:56:13,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-12-23 06:56:13,332 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 120 [2020-12-23 06:56:13,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:13,332 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-12-23 06:56:13,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:56:13,332 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-12-23 06:56:13,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-23 06:56:13,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:13,333 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:13,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:13,539 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:13,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:13,540 INFO L82 PathProgramCache]: Analyzing trace with hash -957343539, now seen corresponding path program 57 times [2020-12-23 06:56:13,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:13,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57982017] [2020-12-23 06:56:13,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:15,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57982017] [2020-12-23 06:56:15,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990770123] [2020-12-23 06:56:15,423 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:15,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2020-12-23 06:56:15,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:15,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 06:56:15,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:15,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:15,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-23 06:56:15,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283140329] [2020-12-23 06:56:15,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 06:56:15,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:15,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 06:56:15,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:56:15,768 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 64 states. [2020-12-23 06:56:18,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:18,126 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2020-12-23 06:56:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 06:56:18,126 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 123 [2020-12-23 06:56:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:18,129 INFO L225 Difference]: With dead ends: 219 [2020-12-23 06:56:18,129 INFO L226 Difference]: Without dead ends: 125 [2020-12-23 06:56:18,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2079, Invalid=6851, Unknown=0, NotChecked=0, Total=8930 [2020-12-23 06:56:18,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-23 06:56:18,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-12-23 06:56:18,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 06:56:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2020-12-23 06:56:18,145 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 123 [2020-12-23 06:56:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:18,146 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2020-12-23 06:56:18,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 06:56:18,146 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2020-12-23 06:56:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 06:56:18,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:18,146 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:18,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 06:56:18,353 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:18,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1559232632, now seen corresponding path program 58 times [2020-12-23 06:56:18,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:18,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703482655] [2020-12-23 06:56:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 435 proven. 1306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:19,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703482655] [2020-12-23 06:56:19,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331205405] [2020-12-23 06:56:19,126 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:19,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:56:19,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:19,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 06:56:19,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:19,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:19,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2020-12-23 06:56:19,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327911696] [2020-12-23 06:56:19,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 06:56:19,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:19,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 06:56:19,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:56:19,448 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2020-12-23 06:56:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:20,361 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2020-12-23 06:56:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-23 06:56:20,362 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2020-12-23 06:56:20,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:20,363 INFO L225 Difference]: With dead ends: 136 [2020-12-23 06:56:20,363 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 06:56:20,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1656, Invalid=2900, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:56:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 06:56:20,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2020-12-23 06:56:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 06:56:20,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2020-12-23 06:56:20,377 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2020-12-23 06:56:20,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:20,377 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2020-12-23 06:56:20,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 06:56:20,378 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2020-12-23 06:56:20,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-23 06:56:20,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:20,378 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:20,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 06:56:20,579 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:20,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:20,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1023213391, now seen corresponding path program 59 times [2020-12-23 06:56:20,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:20,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862104117] [2020-12-23 06:56:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:22,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862104117] [2020-12-23 06:56:22,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687843106] [2020-12-23 06:56:22,637 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:22,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2020-12-23 06:56:22,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:22,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 06:56:22,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:22,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:22,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-23 06:56:22,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880557985] [2020-12-23 06:56:22,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 06:56:22,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:22,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 06:56:22,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:56:22,967 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 66 states. [2020-12-23 06:56:25,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:25,655 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2020-12-23 06:56:25,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 06:56:25,655 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 127 [2020-12-23 06:56:25,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:25,656 INFO L225 Difference]: With dead ends: 226 [2020-12-23 06:56:25,656 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 06:56:25,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2210, Invalid=7296, Unknown=0, NotChecked=0, Total=9506 [2020-12-23 06:56:25,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 06:56:25,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-12-23 06:56:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-23 06:56:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2020-12-23 06:56:25,680 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 127 [2020-12-23 06:56:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:25,680 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2020-12-23 06:56:25,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 06:56:25,680 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2020-12-23 06:56:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-23 06:56:25,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:25,681 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:25,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:25,896 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:25,897 INFO L82 PathProgramCache]: Analyzing trace with hash 722145772, now seen corresponding path program 60 times [2020-12-23 06:56:25,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:25,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923750908] [2020-12-23 06:56:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 465 proven. 1396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:26,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923750908] [2020-12-23 06:56:26,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122315869] [2020-12-23 06:56:26,710 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:26,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 06:56:26,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:26,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 06:56:26,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:27,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:27,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2020-12-23 06:56:27,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555303896] [2020-12-23 06:56:27,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 06:56:27,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:27,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 06:56:27,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:56:27,066 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2020-12-23 06:56:28,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:28,079 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2020-12-23 06:56:28,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 06:56:28,079 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2020-12-23 06:56:28,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:28,080 INFO L225 Difference]: With dead ends: 140 [2020-12-23 06:56:28,081 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 06:56:28,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1757, Invalid=3073, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:56:28,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 06:56:28,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2020-12-23 06:56:28,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 06:56:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2020-12-23 06:56:28,102 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2020-12-23 06:56:28,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:28,102 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2020-12-23 06:56:28,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 06:56:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2020-12-23 06:56:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-23 06:56:28,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:28,103 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:28,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:28,316 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:28,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:28,317 INFO L82 PathProgramCache]: Analyzing trace with hash -41671731, now seen corresponding path program 61 times [2020-12-23 06:56:28,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:28,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962998936] [2020-12-23 06:56:28,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:30,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962998936] [2020-12-23 06:56:30,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679081912] [2020-12-23 06:56:30,526 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:30,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 06:56:30,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:30,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:30,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-23 06:56:30,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88772218] [2020-12-23 06:56:30,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 06:56:30,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:30,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 06:56:30,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:56:30,838 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 68 states. [2020-12-23 06:56:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:32,542 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2020-12-23 06:56:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-23 06:56:32,542 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 131 [2020-12-23 06:56:32,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:32,543 INFO L225 Difference]: With dead ends: 233 [2020-12-23 06:56:32,543 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 06:56:32,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2345, Invalid=7755, Unknown=0, NotChecked=0, Total=10100 [2020-12-23 06:56:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 06:56:32,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-12-23 06:56:32,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 06:56:32,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2020-12-23 06:56:32,560 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 131 [2020-12-23 06:56:32,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:32,560 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2020-12-23 06:56:32,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 06:56:32,560 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2020-12-23 06:56:32,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-23 06:56:32,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:32,561 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:32,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:32,775 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:32,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:32,775 INFO L82 PathProgramCache]: Analyzing trace with hash 341516168, now seen corresponding path program 62 times [2020-12-23 06:56:32,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:32,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70827665] [2020-12-23 06:56:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 496 proven. 1489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:33,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70827665] [2020-12-23 06:56:33,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463090289] [2020-12-23 06:56:33,696 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:33,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:56:33,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:33,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 06:56:33,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:34,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:34,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 38 [2020-12-23 06:56:34,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853065684] [2020-12-23 06:56:34,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:56:34,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:34,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:56:34,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:56:34,025 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2020-12-23 06:56:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:35,054 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2020-12-23 06:56:35,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 06:56:35,055 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2020-12-23 06:56:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:35,056 INFO L225 Difference]: With dead ends: 144 [2020-12-23 06:56:35,056 INFO L226 Difference]: Without dead ends: 142 [2020-12-23 06:56:35,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1861, Invalid=3251, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:56:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-23 06:56:35,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2020-12-23 06:56:35,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 06:56:35,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2020-12-23 06:56:35,083 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 132 [2020-12-23 06:56:35,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:35,084 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2020-12-23 06:56:35,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:56:35,084 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2020-12-23 06:56:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 06:56:35,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:35,085 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:35,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:35,299 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:35,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:35,299 INFO L82 PathProgramCache]: Analyzing trace with hash -664543055, now seen corresponding path program 63 times [2020-12-23 06:56:35,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:35,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927732923] [2020-12-23 06:56:35,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:37,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927732923] [2020-12-23 06:56:37,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399423888] [2020-12-23 06:56:37,648 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:37,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2020-12-23 06:56:37,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:37,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-23 06:56:37,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:38,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:38,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-23 06:56:38,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897715797] [2020-12-23 06:56:38,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 06:56:38,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:38,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 06:56:38,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:56:38,043 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 70 states. [2020-12-23 06:56:41,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:41,116 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2020-12-23 06:56:41,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 06:56:41,116 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 135 [2020-12-23 06:56:41,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:41,117 INFO L225 Difference]: With dead ends: 240 [2020-12-23 06:56:41,117 INFO L226 Difference]: Without dead ends: 137 [2020-12-23 06:56:41,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2484, Invalid=8228, Unknown=0, NotChecked=0, Total=10712 [2020-12-23 06:56:41,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-23 06:56:41,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-12-23 06:56:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 06:56:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2020-12-23 06:56:41,134 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 135 [2020-12-23 06:56:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:41,134 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2020-12-23 06:56:41,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 06:56:41,135 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2020-12-23 06:56:41,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 06:56:41,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:41,135 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:41,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:41,337 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:41,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1871742700, now seen corresponding path program 64 times [2020-12-23 06:56:41,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:41,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111570728] [2020-12-23 06:56:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 528 proven. 1585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:42,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111570728] [2020-12-23 06:56:42,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998496198] [2020-12-23 06:56:42,196 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:42,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:56:42,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:42,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 06:56:42,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:42,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:42,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2020-12-23 06:56:42,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469230241] [2020-12-23 06:56:42,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:56:42,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:42,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:56:42,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:56:42,541 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2020-12-23 06:56:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:43,616 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2020-12-23 06:56:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-23 06:56:43,617 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2020-12-23 06:56:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:43,618 INFO L225 Difference]: With dead ends: 148 [2020-12-23 06:56:43,618 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 06:56:43,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1968, Invalid=3434, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:56:43,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 06:56:43,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2020-12-23 06:56:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-23 06:56:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2020-12-23 06:56:43,641 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 136 [2020-12-23 06:56:43,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:43,641 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2020-12-23 06:56:43,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:56:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2020-12-23 06:56:43,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-23 06:56:43,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:43,642 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:43,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-23 06:56:43,843 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:43,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:43,844 INFO L82 PathProgramCache]: Analyzing trace with hash -468807987, now seen corresponding path program 65 times [2020-12-23 06:56:43,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:43,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879134421] [2020-12-23 06:56:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:46,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879134421] [2020-12-23 06:56:46,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110258045] [2020-12-23 06:56:46,339 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:46,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-12-23 06:56:46,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:46,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 06:56:46,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:46,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:46,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-23 06:56:46,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999233175] [2020-12-23 06:56:46,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 06:56:46,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:46,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 06:56:46,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:56:46,706 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand 72 states. [2020-12-23 06:56:50,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:50,102 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2020-12-23 06:56:50,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 06:56:50,102 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 139 [2020-12-23 06:56:50,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:50,103 INFO L225 Difference]: With dead ends: 247 [2020-12-23 06:56:50,103 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 06:56:50,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2627, Invalid=8715, Unknown=0, NotChecked=0, Total=11342 [2020-12-23 06:56:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 06:56:50,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-12-23 06:56:50,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 06:56:50,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-12-23 06:56:50,122 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 139 [2020-12-23 06:56:50,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:50,122 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-12-23 06:56:50,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 06:56:50,122 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-12-23 06:56:50,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-23 06:56:50,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:50,123 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:50,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 06:56:50,324 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:50,325 INFO L82 PathProgramCache]: Analyzing trace with hash 733454216, now seen corresponding path program 66 times [2020-12-23 06:56:50,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:50,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298095772] [2020-12-23 06:56:50,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 561 proven. 1684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:51,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298095772] [2020-12-23 06:56:51,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404663753] [2020-12-23 06:56:51,317 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:51,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2020-12-23 06:56:51,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:51,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 06:56:51,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:51,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:51,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2020-12-23 06:56:51,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622391203] [2020-12-23 06:56:51,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:56:51,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:51,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:56:51,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:56:51,702 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2020-12-23 06:56:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:52,847 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2020-12-23 06:56:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 06:56:52,848 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2020-12-23 06:56:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:52,849 INFO L225 Difference]: With dead ends: 152 [2020-12-23 06:56:52,849 INFO L226 Difference]: Without dead ends: 150 [2020-12-23 06:56:52,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2078, Invalid=3622, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:56:52,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-23 06:56:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2020-12-23 06:56:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-23 06:56:52,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-12-23 06:56:52,872 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2020-12-23 06:56:52,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:52,872 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-12-23 06:56:52,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:56:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-12-23 06:56:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-23 06:56:52,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:52,873 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:53,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:53,088 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:53,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:53,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1840734385, now seen corresponding path program 67 times [2020-12-23 06:56:53,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:53,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999827955] [2020-12-23 06:56:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:55,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999827955] [2020-12-23 06:56:55,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303642807] [2020-12-23 06:56:55,741 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:55,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 06:56:55,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:56,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:56,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-23 06:56:56,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598626215] [2020-12-23 06:56:56,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-23 06:56:56,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:56,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-23 06:56:56,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:56:56,083 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 74 states. [2020-12-23 06:56:59,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:59,581 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2020-12-23 06:56:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-23 06:56:59,581 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 143 [2020-12-23 06:56:59,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:59,582 INFO L225 Difference]: With dead ends: 254 [2020-12-23 06:56:59,582 INFO L226 Difference]: Without dead ends: 145 [2020-12-23 06:56:59,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2774, Invalid=9216, Unknown=0, NotChecked=0, Total=11990 [2020-12-23 06:56:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-23 06:56:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-12-23 06:56:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 06:56:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2020-12-23 06:56:59,608 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 143 [2020-12-23 06:56:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:59,608 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2020-12-23 06:56:59,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-23 06:56:59,608 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2020-12-23 06:56:59,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-23 06:56:59,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:59,609 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:59,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 06:56:59,823 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:59,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:59,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1532781588, now seen corresponding path program 68 times [2020-12-23 06:56:59,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:59,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534989272] [2020-12-23 06:56:59,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 595 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:00,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534989272] [2020-12-23 06:57:00,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106345860] [2020-12-23 06:57:00,873 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:01,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:57:01,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:01,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-23 06:57:01,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:01,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:01,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2020-12-23 06:57:01,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66987795] [2020-12-23 06:57:01,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:57:01,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:01,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:57:01,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:57:01,221 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2020-12-23 06:57:02,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:02,440 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2020-12-23 06:57:02,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 06:57:02,440 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2020-12-23 06:57:02,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:02,441 INFO L225 Difference]: With dead ends: 156 [2020-12-23 06:57:02,441 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 06:57:02,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2191, Invalid=3815, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 06:57:02,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 06:57:02,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2020-12-23 06:57:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-23 06:57:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2020-12-23 06:57:02,478 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 144 [2020-12-23 06:57:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:02,478 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2020-12-23 06:57:02,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:57:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2020-12-23 06:57:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-23 06:57:02,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:02,480 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:02,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-23 06:57:02,693 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:02,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:02,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1000823245, now seen corresponding path program 69 times [2020-12-23 06:57:02,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:02,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199228964] [2020-12-23 06:57:02,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:05,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199228964] [2020-12-23 06:57:05,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602998436] [2020-12-23 06:57:05,484 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:05,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2020-12-23 06:57:05,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:05,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 06:57:05,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:05,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:05,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-23 06:57:05,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591606123] [2020-12-23 06:57:05,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 06:57:05,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:05,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 06:57:05,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:57:05,930 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 76 states. [2020-12-23 06:57:09,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:09,617 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2020-12-23 06:57:09,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 06:57:09,617 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 147 [2020-12-23 06:57:09,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:09,618 INFO L225 Difference]: With dead ends: 261 [2020-12-23 06:57:09,618 INFO L226 Difference]: Without dead ends: 149 [2020-12-23 06:57:09,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2925, Invalid=9731, Unknown=0, NotChecked=0, Total=12656 [2020-12-23 06:57:09,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-23 06:57:09,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-12-23 06:57:09,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-23 06:57:09,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2020-12-23 06:57:09,648 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 147 [2020-12-23 06:57:09,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:09,649 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2020-12-23 06:57:09,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 06:57:09,649 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2020-12-23 06:57:09,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 06:57:09,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:09,650 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:09,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-12-23 06:57:09,864 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:09,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:09,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1597865864, now seen corresponding path program 70 times [2020-12-23 06:57:09,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:09,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523419224] [2020-12-23 06:57:09,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 630 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:10,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523419224] [2020-12-23 06:57:10,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019679299] [2020-12-23 06:57:10,970 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:11,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:57:11,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:11,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 06:57:11,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:11,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:11,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 42 [2020-12-23 06:57:11,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382728857] [2020-12-23 06:57:11,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 06:57:11,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:11,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 06:57:11,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:57:11,363 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2020-12-23 06:57:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:12,610 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2020-12-23 06:57:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-23 06:57:12,612 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2020-12-23 06:57:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:12,613 INFO L225 Difference]: With dead ends: 160 [2020-12-23 06:57:12,613 INFO L226 Difference]: Without dead ends: 158 [2020-12-23 06:57:12,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2307, Invalid=4013, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:57:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-23 06:57:12,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2020-12-23 06:57:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 06:57:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2020-12-23 06:57:12,639 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 148 [2020-12-23 06:57:12,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:12,640 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2020-12-23 06:57:12,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 06:57:12,640 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2020-12-23 06:57:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-23 06:57:12,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:12,641 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:12,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:12,853 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:12,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:12,854 INFO L82 PathProgramCache]: Analyzing trace with hash 904233137, now seen corresponding path program 71 times [2020-12-23 06:57:12,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:12,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359850799] [2020-12-23 06:57:12,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:15,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359850799] [2020-12-23 06:57:15,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6767146] [2020-12-23 06:57:15,839 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:16,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-12-23 06:57:16,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:16,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 06:57:16,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:16,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:16,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-23 06:57:16,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482657591] [2020-12-23 06:57:16,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-23 06:57:16,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:16,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-23 06:57:16,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 06:57:16,256 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 78 states. [2020-12-23 06:57:18,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:18,860 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2020-12-23 06:57:18,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 06:57:18,860 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 151 [2020-12-23 06:57:18,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:18,861 INFO L225 Difference]: With dead ends: 268 [2020-12-23 06:57:18,861 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 06:57:18,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3080, Invalid=10260, Unknown=0, NotChecked=0, Total=13340 [2020-12-23 06:57:18,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 06:57:18,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2020-12-23 06:57:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 06:57:18,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-12-23 06:57:18,895 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 151 [2020-12-23 06:57:18,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:18,896 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-12-23 06:57:18,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-23 06:57:18,896 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-12-23 06:57:18,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-23 06:57:18,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:18,897 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:19,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:19,098 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:19,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:19,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1305718548, now seen corresponding path program 72 times [2020-12-23 06:57:19,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:19,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057776670] [2020-12-23 06:57:19,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 666 proven. 1999 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:20,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057776670] [2020-12-23 06:57:20,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562181273] [2020-12-23 06:57:20,265 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:20,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-23 06:57:20,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:20,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-23 06:57:20,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:20,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:20,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2020-12-23 06:57:20,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340976102] [2020-12-23 06:57:20,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:57:20,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:20,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:57:20,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:57:20,692 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2020-12-23 06:57:21,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:21,987 INFO L93 Difference]: Finished difference Result 164 states and 165 transitions. [2020-12-23 06:57:21,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-23 06:57:21,988 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2020-12-23 06:57:21,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:21,989 INFO L225 Difference]: With dead ends: 164 [2020-12-23 06:57:21,989 INFO L226 Difference]: Without dead ends: 162 [2020-12-23 06:57:21,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2426, Invalid=4216, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 06:57:21,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-23 06:57:22,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2020-12-23 06:57:22,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-12-23 06:57:22,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2020-12-23 06:57:22,021 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 152 [2020-12-23 06:57:22,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:22,021 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2020-12-23 06:57:22,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:57:22,021 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2020-12-23 06:57:22,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-23 06:57:22,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:22,022 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:22,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:22,237 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:22,237 INFO L82 PathProgramCache]: Analyzing trace with hash 862356685, now seen corresponding path program 73 times [2020-12-23 06:57:22,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:22,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330676488] [2020-12-23 06:57:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:25,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330676488] [2020-12-23 06:57:25,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070443837] [2020-12-23 06:57:25,386 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:25,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-23 06:57:25,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:25,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:25,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2020-12-23 06:57:25,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849698713] [2020-12-23 06:57:25,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-23 06:57:25,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:25,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-23 06:57:25,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:57:25,761 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 80 states. [2020-12-23 06:57:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:29,231 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2020-12-23 06:57:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-23 06:57:29,231 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 155 [2020-12-23 06:57:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:29,233 INFO L225 Difference]: With dead ends: 275 [2020-12-23 06:57:29,233 INFO L226 Difference]: Without dead ends: 157 [2020-12-23 06:57:29,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3239, Invalid=10803, Unknown=0, NotChecked=0, Total=14042 [2020-12-23 06:57:29,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-23 06:57:29,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-12-23 06:57:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 06:57:29,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-12-23 06:57:29,266 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 155 [2020-12-23 06:57:29,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:29,266 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-12-23 06:57:29,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-23 06:57:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-12-23 06:57:29,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-23 06:57:29,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:29,268 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:29,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-23 06:57:29,482 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:29,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:29,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1828405368, now seen corresponding path program 74 times [2020-12-23 06:57:29,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:29,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003778908] [2020-12-23 06:57:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 703 proven. 2110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:30,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003778908] [2020-12-23 06:57:30,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125700245] [2020-12-23 06:57:30,712 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:30,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:57:30,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:30,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-23 06:57:30,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:31,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:31,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 44 [2020-12-23 06:57:31,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079711735] [2020-12-23 06:57:31,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 06:57:31,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:31,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 06:57:31,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:57:31,087 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2020-12-23 06:57:32,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:32,458 INFO L93 Difference]: Finished difference Result 168 states and 169 transitions. [2020-12-23 06:57:32,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-23 06:57:32,459 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2020-12-23 06:57:32,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:32,460 INFO L225 Difference]: With dead ends: 168 [2020-12-23 06:57:32,460 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 06:57:32,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2548, Invalid=4424, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 06:57:32,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 06:57:32,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2020-12-23 06:57:32,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-23 06:57:32,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2020-12-23 06:57:32,494 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 156 [2020-12-23 06:57:32,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:32,494 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2020-12-23 06:57:32,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 06:57:32,494 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2020-12-23 06:57:32,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-23 06:57:32,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:32,495 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:32,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:32,709 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:32,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1244249935, now seen corresponding path program 75 times [2020-12-23 06:57:32,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:32,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564837204] [2020-12-23 06:57:32,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:36,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564837204] [2020-12-23 06:57:36,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021899293] [2020-12-23 06:57:36,078 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:36,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2020-12-23 06:57:36,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:36,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-23 06:57:36,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:36,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:36,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2020-12-23 06:57:36,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457327038] [2020-12-23 06:57:36,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-23 06:57:36,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:36,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-23 06:57:36,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 06:57:36,515 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 82 states. [2020-12-23 06:57:40,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:40,983 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2020-12-23 06:57:40,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-23 06:57:40,983 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 159 [2020-12-23 06:57:40,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:40,984 INFO L225 Difference]: With dead ends: 282 [2020-12-23 06:57:40,984 INFO L226 Difference]: Without dead ends: 161 [2020-12-23 06:57:40,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2413 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3402, Invalid=11360, Unknown=0, NotChecked=0, Total=14762 [2020-12-23 06:57:40,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-23 06:57:41,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2020-12-23 06:57:41,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-23 06:57:41,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2020-12-23 06:57:41,009 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 159 [2020-12-23 06:57:41,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:41,010 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2020-12-23 06:57:41,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-23 06:57:41,010 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2020-12-23 06:57:41,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-23 06:57:41,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:41,011 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:41,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:41,225 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:41,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1376953836, now seen corresponding path program 76 times [2020-12-23 06:57:41,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:41,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592221292] [2020-12-23 06:57:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 741 proven. 2224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:42,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592221292] [2020-12-23 06:57:42,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155068270] [2020-12-23 06:57:42,514 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:42,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:57:42,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:42,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 06:57:42,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 780 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:42,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:42,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 45 [2020-12-23 06:57:42,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439456425] [2020-12-23 06:57:42,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 06:57:42,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:42,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 06:57:42,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=1111, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:57:42,931 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2020-12-23 06:57:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:44,394 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2020-12-23 06:57:44,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-23 06:57:44,395 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2020-12-23 06:57:44,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:44,396 INFO L225 Difference]: With dead ends: 172 [2020-12-23 06:57:44,396 INFO L226 Difference]: Without dead ends: 170 [2020-12-23 06:57:44,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2673, Invalid=4637, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 06:57:44,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-23 06:57:44,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 164. [2020-12-23 06:57:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 06:57:44,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2020-12-23 06:57:44,424 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 160 [2020-12-23 06:57:44,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:44,424 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2020-12-23 06:57:44,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 06:57:44,425 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2020-12-23 06:57:44,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-23 06:57:44,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:44,426 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:44,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-23 06:57:44,639 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:44,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:44,639 INFO L82 PathProgramCache]: Analyzing trace with hash -396095539, now seen corresponding path program 77 times [2020-12-23 06:57:44,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:44,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669921879] [2020-12-23 06:57:44,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:48,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669921879] [2020-12-23 06:57:48,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309752326] [2020-12-23 06:57:48,195 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:48,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2020-12-23 06:57:48,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:48,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-23 06:57:48,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:48,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:48,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2020-12-23 06:57:48,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682582680] [2020-12-23 06:57:48,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-12-23 06:57:48,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:48,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-12-23 06:57:48,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 06:57:48,624 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 84 states. [2020-12-23 06:57:53,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:53,392 INFO L93 Difference]: Finished difference Result 289 states and 291 transitions. [2020-12-23 06:57:53,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-23 06:57:53,393 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 163 [2020-12-23 06:57:53,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:53,394 INFO L225 Difference]: With dead ends: 289 [2020-12-23 06:57:53,394 INFO L226 Difference]: Without dead ends: 165 [2020-12-23 06:57:53,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2535 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3569, Invalid=11931, Unknown=0, NotChecked=0, Total=15500 [2020-12-23 06:57:53,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-23 06:57:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2020-12-23 06:57:53,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-23 06:57:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2020-12-23 06:57:53,418 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 163 [2020-12-23 06:57:53,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:53,418 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2020-12-23 06:57:53,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-12-23 06:57:53,418 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2020-12-23 06:57:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-23 06:57:53,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:53,419 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:53,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-23 06:57:53,620 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:53,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1725603960, now seen corresponding path program 78 times [2020-12-23 06:57:53,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:53,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873341915] [2020-12-23 06:57:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 780 proven. 2341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:55,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873341915] [2020-12-23 06:57:55,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125850652] [2020-12-23 06:57:55,012 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:55,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2020-12-23 06:57:55,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:55,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-23 06:57:55,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 820 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:55,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:55,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 46 [2020-12-23 06:57:55,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684597772] [2020-12-23 06:57:55,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 06:57:55,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:55,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 06:57:55,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=1159, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:57:55,505 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2020-12-23 06:57:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:57,050 INFO L93 Difference]: Finished difference Result 176 states and 177 transitions. [2020-12-23 06:57:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-23 06:57:57,051 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2020-12-23 06:57:57,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:57,052 INFO L225 Difference]: With dead ends: 176 [2020-12-23 06:57:57,052 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 06:57:57,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1837 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2801, Invalid=4855, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 06:57:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 06:57:57,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2020-12-23 06:57:57,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-12-23 06:57:57,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2020-12-23 06:57:57,075 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 164 [2020-12-23 06:57:57,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:57,075 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2020-12-23 06:57:57,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 06:57:57,075 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2020-12-23 06:57:57,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-23 06:57:57,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:57,076 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:57,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:57,277 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:57,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:57,278 INFO L82 PathProgramCache]: Analyzing trace with hash -999186255, now seen corresponding path program 79 times [2020-12-23 06:57:57,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:57,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813805750] [2020-12-23 06:57:57,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:01,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813805750] [2020-12-23 06:58:01,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073167694] [2020-12-23 06:58:01,063 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:01,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-23 06:58:01,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:01,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:01,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2020-12-23 06:58:01,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087318358] [2020-12-23 06:58:01,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-23 06:58:01,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:01,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-23 06:58:01,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 06:58:01,455 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 86 states. [2020-12-23 06:58:06,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:06,562 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2020-12-23 06:58:06,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-23 06:58:06,562 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 167 [2020-12-23 06:58:06,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:06,563 INFO L225 Difference]: With dead ends: 296 [2020-12-23 06:58:06,563 INFO L226 Difference]: Without dead ends: 169 [2020-12-23 06:58:06,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3740, Invalid=12516, Unknown=0, NotChecked=0, Total=16256 [2020-12-23 06:58:06,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-23 06:58:06,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-12-23 06:58:06,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-23 06:58:06,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2020-12-23 06:58:06,591 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 167 [2020-12-23 06:58:06,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:06,592 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2020-12-23 06:58:06,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-23 06:58:06,592 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2020-12-23 06:58:06,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-23 06:58:06,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:06,593 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:06,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:06,806 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:06,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:06,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1874945300, now seen corresponding path program 80 times [2020-12-23 06:58:06,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:06,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702754102] [2020-12-23 06:58:06,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 820 proven. 2461 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:08,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702754102] [2020-12-23 06:58:08,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301687575] [2020-12-23 06:58:08,269 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:08,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:58:08,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:08,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-23 06:58:08,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 861 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:08,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:08,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 47 [2020-12-23 06:58:08,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774933318] [2020-12-23 06:58:08,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 06:58:08,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:08,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 06:58:08,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:58:08,693 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 47 states. [2020-12-23 06:58:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:10,365 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2020-12-23 06:58:10,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-12-23 06:58:10,366 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 168 [2020-12-23 06:58:10,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:10,366 INFO L225 Difference]: With dead ends: 180 [2020-12-23 06:58:10,367 INFO L226 Difference]: Without dead ends: 178 [2020-12-23 06:58:10,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1924 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2932, Invalid=5078, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 06:58:10,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-23 06:58:10,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 172. [2020-12-23 06:58:10,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-23 06:58:10,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2020-12-23 06:58:10,404 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 168 [2020-12-23 06:58:10,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:10,404 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2020-12-23 06:58:10,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 06:58:10,404 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2020-12-23 06:58:10,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-23 06:58:10,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:10,405 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:10,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:10,613 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:10,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:10,613 INFO L82 PathProgramCache]: Analyzing trace with hash -440927539, now seen corresponding path program 81 times [2020-12-23 06:58:10,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:10,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478902240] [2020-12-23 06:58:10,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:14,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478902240] [2020-12-23 06:58:14,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681304951] [2020-12-23 06:58:14,648 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:14,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2020-12-23 06:58:14,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:14,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-23 06:58:14,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:15,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:15,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2020-12-23 06:58:15,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405464504] [2020-12-23 06:58:15,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-12-23 06:58:15,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:15,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-12-23 06:58:15,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 06:58:15,131 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 88 states. [2020-12-23 06:58:20,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:20,517 INFO L93 Difference]: Finished difference Result 303 states and 305 transitions. [2020-12-23 06:58:20,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-23 06:58:20,517 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 171 [2020-12-23 06:58:20,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:20,518 INFO L225 Difference]: With dead ends: 303 [2020-12-23 06:58:20,518 INFO L226 Difference]: Without dead ends: 173 [2020-12-23 06:58:20,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2788 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=3915, Invalid=13115, Unknown=0, NotChecked=0, Total=17030 [2020-12-23 06:58:20,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-23 06:58:20,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2020-12-23 06:58:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-23 06:58:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2020-12-23 06:58:20,554 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 171 [2020-12-23 06:58:20,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:20,554 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2020-12-23 06:58:20,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-12-23 06:58:20,554 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2020-12-23 06:58:20,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-23 06:58:20,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:20,555 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:20,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:20,756 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:20,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1313382520, now seen corresponding path program 82 times [2020-12-23 06:58:20,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:20,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396968874] [2020-12-23 06:58:20,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 861 proven. 2584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:22,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396968874] [2020-12-23 06:58:22,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455957416] [2020-12-23 06:58:22,294 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:22,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:58:22,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:22,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-23 06:58:22,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 903 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:22,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:22,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 48 [2020-12-23 06:58:22,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539152620] [2020-12-23 06:58:22,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 06:58:22,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:22,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 06:58:22,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=1258, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:58:22,789 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2020-12-23 06:58:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:24,442 INFO L93 Difference]: Finished difference Result 184 states and 185 transitions. [2020-12-23 06:58:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-12-23 06:58:24,443 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2020-12-23 06:58:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:24,444 INFO L225 Difference]: With dead ends: 184 [2020-12-23 06:58:24,444 INFO L226 Difference]: Without dead ends: 182 [2020-12-23 06:58:24,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3066, Invalid=5306, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 06:58:24,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-23 06:58:24,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2020-12-23 06:58:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-23 06:58:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2020-12-23 06:58:24,478 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 172 [2020-12-23 06:58:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:24,479 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2020-12-23 06:58:24,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 06:58:24,479 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2020-12-23 06:58:24,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-23 06:58:24,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:24,480 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:24,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:24,695 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:24,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:24,695 INFO L82 PathProgramCache]: Analyzing trace with hash 178233521, now seen corresponding path program 83 times [2020-12-23 06:58:24,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:24,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653917396] [2020-12-23 06:58:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:28,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653917396] [2020-12-23 06:58:28,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758895761] [2020-12-23 06:58:28,968 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:29,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2020-12-23 06:58:29,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:29,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-23 06:58:29,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:29,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:29,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2020-12-23 06:58:29,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794286481] [2020-12-23 06:58:29,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-12-23 06:58:29,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:29,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-12-23 06:58:29,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 06:58:29,461 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand 90 states. [2020-12-23 06:58:34,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:34,347 INFO L93 Difference]: Finished difference Result 310 states and 312 transitions. [2020-12-23 06:58:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-12-23 06:58:34,347 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 175 [2020-12-23 06:58:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:34,348 INFO L225 Difference]: With dead ends: 310 [2020-12-23 06:58:34,348 INFO L226 Difference]: Without dead ends: 177 [2020-12-23 06:58:34,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2919 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4094, Invalid=13728, Unknown=0, NotChecked=0, Total=17822 [2020-12-23 06:58:34,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-23 06:58:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2020-12-23 06:58:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 06:58:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2020-12-23 06:58:34,377 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 175 [2020-12-23 06:58:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:34,377 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2020-12-23 06:58:34,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-12-23 06:58:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2020-12-23 06:58:34,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-23 06:58:34,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:34,378 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:34,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-12-23 06:58:34,579 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:34,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:34,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1251487724, now seen corresponding path program 84 times [2020-12-23 06:58:34,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:34,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54494507] [2020-12-23 06:58:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 903 proven. 2710 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:36,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54494507] [2020-12-23 06:58:36,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691408937] [2020-12-23 06:58:36,252 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:36,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-23 06:58:36,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:36,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 94 conjunts are in the unsatisfiable core [2020-12-23 06:58:36,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 946 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:36,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:36,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 49 [2020-12-23 06:58:36,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382584173] [2020-12-23 06:58:36,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 06:58:36,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:36,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 06:58:36,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1043, Invalid=1309, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:58:36,781 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 49 states. [2020-12-23 06:58:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:38,579 INFO L93 Difference]: Finished difference Result 188 states and 189 transitions. [2020-12-23 06:58:38,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-12-23 06:58:38,580 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 176 [2020-12-23 06:58:38,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:38,581 INFO L225 Difference]: With dead ends: 188 [2020-12-23 06:58:38,581 INFO L226 Difference]: Without dead ends: 186 [2020-12-23 06:58:38,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3203, Invalid=5539, Unknown=0, NotChecked=0, Total=8742 [2020-12-23 06:58:38,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-23 06:58:38,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 180. [2020-12-23 06:58:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 06:58:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2020-12-23 06:58:38,610 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 176 [2020-12-23 06:58:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:38,610 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2020-12-23 06:58:38,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 06:58:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2020-12-23 06:58:38,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-12-23 06:58:38,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:38,611 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:38,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:38,817 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:38,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:38,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1535490611, now seen corresponding path program 85 times [2020-12-23 06:58:38,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:38,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856101351] [2020-12-23 06:58:38,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:43,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856101351] [2020-12-23 06:58:43,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265624351] [2020-12-23 06:58:43,364 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:43,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-23 06:58:43,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:43,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:43,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2020-12-23 06:58:43,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151566301] [2020-12-23 06:58:43,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-12-23 06:58:43,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:43,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-12-23 06:58:43,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 06:58:43,816 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 92 states. [2020-12-23 06:58:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:49,987 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2020-12-23 06:58:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-12-23 06:58:49,987 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 179 [2020-12-23 06:58:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:49,988 INFO L225 Difference]: With dead ends: 317 [2020-12-23 06:58:49,988 INFO L226 Difference]: Without dead ends: 181 [2020-12-23 06:58:49,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3053 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4277, Invalid=14355, Unknown=0, NotChecked=0, Total=18632 [2020-12-23 06:58:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-23 06:58:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2020-12-23 06:58:50,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 06:58:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2020-12-23 06:58:50,030 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 179 [2020-12-23 06:58:50,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:50,031 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2020-12-23 06:58:50,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-12-23 06:58:50,031 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2020-12-23 06:58:50,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-23 06:58:50,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:50,032 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:50,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-12-23 06:58:50,246 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:50,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:50,247 INFO L82 PathProgramCache]: Analyzing trace with hash 181583752, now seen corresponding path program 86 times [2020-12-23 06:58:50,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:50,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948067789] [2020-12-23 06:58:50,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat