/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/fragtest_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:54:47,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:54:47,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:54:47,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:54:47,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:54:47,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:54:47,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:54:47,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:54:47,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:54:47,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:54:47,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:54:47,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:54:47,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:54:47,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:54:47,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:54:47,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:54:47,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:54:47,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:54:47,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:54:47,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:54:47,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:54:47,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:54:47,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:54:47,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:54:47,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:54:47,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:54:47,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:54:47,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:54:47,473 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 06:54:47,524 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:54:47,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:54:47,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:54:47,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:54:47,528 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:54:47,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:54:47,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:54:47,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:54:47,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:54:47,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:54:47,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:54:47,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:54:47,530 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:54:47,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:54:47,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:54:47,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:54:47,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:54:47,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:54:47,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:54:47,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:54:47,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:54:47,533 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:54:47,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:54:47,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:54:47,533 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:54:47,534 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:54:47,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:54:47,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:54:47,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:54:47,963 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:54:47,964 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:54:47,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/fragtest_simple.i [2020-12-23 06:54:48,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/923abc9b5/69238edb3d204025882fa9643ca50841/FLAG893c72643 [2020-12-23 06:54:48,699 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:54:48,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-invgen/fragtest_simple.i [2020-12-23 06:54:48,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/923abc9b5/69238edb3d204025882fa9643ca50841/FLAG893c72643 [2020-12-23 06:54:49,054 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/923abc9b5/69238edb3d204025882fa9643ca50841 [2020-12-23 06:54:49,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:54:49,065 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:54:49,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:54:49,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:54:49,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:54:49,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:54:49" (1/1) ... [2020-12-23 06:54:49,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d13f984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:49, skipping insertion in model container [2020-12-23 06:54:49,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:54:49" (1/1) ... [2020-12-23 06:54:49,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:54:49,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:54:49,248 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/fragtest_simple.i[893,906] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~pvlen~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~pvlen~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___1~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2020-12-23 06:54:49,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:54:49,275 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:54:49,287 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/fragtest_simple.i[893,906] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~pvlen~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~pvlen~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___1~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2020-12-23 06:54:49,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:54:49,310 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:54:49,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:49 WrapperNode [2020-12-23 06:54:49,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:54:49,311 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:54:49,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:54:49,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:54:49,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:49" (1/1) ... [2020-12-23 06:54:49,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:49" (1/1) ... [2020-12-23 06:54:49,347 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:54:49,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:54:49,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:54:49,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:54:49,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:49" (1/1) ... [2020-12-23 06:54:49,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:49" (1/1) ... [2020-12-23 06:54:49,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:49" (1/1) ... [2020-12-23 06:54:49,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:49" (1/1) ... [2020-12-23 06:54:49,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:49" (1/1) ... [2020-12-23 06:54:49,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:49" (1/1) ... [2020-12-23 06:54:49,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:49" (1/1) ... [2020-12-23 06:54:49,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:54:49,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:54:49,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:54:49,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:54:49,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:49" (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 06:54:49,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:54:49,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:54:49,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:54:49,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:54:49,781 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:54:49,784 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 06:54:49,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:54:49 BoogieIcfgContainer [2020-12-23 06:54:49,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:54:49,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:54:49,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:54:49,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:54:49,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:54:49" (1/3) ... [2020-12-23 06:54:49,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d5c7f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:54:49, skipping insertion in model container [2020-12-23 06:54:49,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:49" (2/3) ... [2020-12-23 06:54:49,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d5c7f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:54:49, skipping insertion in model container [2020-12-23 06:54:49,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:54:49" (3/3) ... [2020-12-23 06:54:49,806 INFO L111 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2020-12-23 06:54:49,823 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:54:49,834 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:54:49,885 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:54:49,973 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:54:49,974 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:54:49,974 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:54:49,974 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:54:49,976 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:54:49,976 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:54:49,977 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:54:49,977 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:54:50,022 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-23 06:54:50,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:54:50,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:50,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:50,038 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:50,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1265170590, now seen corresponding path program 1 times [2020-12-23 06:54:50,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:50,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310152464] [2020-12-23 06:54:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:50,254 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 06:54:50,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310152464] [2020-12-23 06:54:50,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:54:50,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:54:50,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769084979] [2020-12-23 06:54:50,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:54:50,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:50,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:54:50,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:54:50,283 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-23 06:54:50,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:50,306 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2020-12-23 06:54:50,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:54:50,308 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 06:54:50,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:50,330 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:54:50,330 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 06:54:50,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:54:50,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 06:54:50,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 06:54:50,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 06:54:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-23 06:54:50,370 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2020-12-23 06:54:50,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:50,370 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-23 06:54:50,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:54:50,371 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-23 06:54:50,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:54:50,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:50,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:50,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:54:50,373 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:50,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:50,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1704738984, now seen corresponding path program 1 times [2020-12-23 06:54:50,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:50,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071440235] [2020-12-23 06:54:50,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:50,595 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 06:54:50,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071440235] [2020-12-23 06:54:50,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:54:50,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:54:50,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305345643] [2020-12-23 06:54:50,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:54:50,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:50,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:54:50,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:54:50,599 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 4 states. [2020-12-23 06:54:50,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:50,662 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-23 06:54:50,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:54:50,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-23 06:54:50,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:50,664 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:54:50,664 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 06:54:50,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:54:50,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 06:54:50,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-23 06:54:50,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 06:54:50,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-23 06:54:50,671 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2020-12-23 06:54:50,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:50,671 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-23 06:54:50,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:54:50,671 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-23 06:54:50,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:54:50,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:50,672 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:50,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:54:50,673 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:50,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:50,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1111328011, now seen corresponding path program 1 times [2020-12-23 06:54:50,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:50,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563101381] [2020-12-23 06:54:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:50,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563101381] [2020-12-23 06:54:50,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:54:50,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:54:50,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630746901] [2020-12-23 06:54:50,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:54:50,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:50,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:54:50,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:54:50,773 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-12-23 06:54:50,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:50,878 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-12-23 06:54:50,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:54:50,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-23 06:54:50,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:50,880 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:54:50,880 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 06:54:50,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:54:50,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 06:54:50,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2020-12-23 06:54:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 06:54:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-23 06:54:50,886 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2020-12-23 06:54:50,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:50,886 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-23 06:54:50,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:54:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-23 06:54:50,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:54:50,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:50,887 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:50,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 06:54:50,888 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:50,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:50,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1396960176, now seen corresponding path program 1 times [2020-12-23 06:54:50,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:50,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240897168] [2020-12-23 06:54:50,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:50,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240897168] [2020-12-23 06:54:50,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733265320] [2020-12-23 06:54:50,974 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 06:54:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:51,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:54:51,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:51,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:51,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 06:54:51,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526104465] [2020-12-23 06:54:51,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:54:51,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:51,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:54:51,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:54:51,265 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 10 states. [2020-12-23 06:54:51,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:51,471 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2020-12-23 06:54:51,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:54:51,472 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-23 06:54:51,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:51,475 INFO L225 Difference]: With dead ends: 45 [2020-12-23 06:54:51,475 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 06:54:51,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:54:51,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 06:54:51,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2020-12-23 06:54:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 06:54:51,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-23 06:54:51,489 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2020-12-23 06:54:51,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:51,490 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-23 06:54:51,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:54:51,490 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-23 06:54:51,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:54:51,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:51,491 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:51,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:51,706 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:51,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:51,708 INFO L82 PathProgramCache]: Analyzing trace with hash -2071602104, now seen corresponding path program 2 times [2020-12-23 06:54:51,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:51,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709443964] [2020-12-23 06:54:51,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:51,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709443964] [2020-12-23 06:54:51,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685494133] [2020-12-23 06:54:51,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:51,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:54:51,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:51,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:54:51,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:51,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:51,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-12-23 06:54:51,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016695542] [2020-12-23 06:54:51,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:54:51,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:51,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:54:51,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:54:51,996 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 13 states. [2020-12-23 06:54:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:52,246 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2020-12-23 06:54:52,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:54:52,247 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-12-23 06:54:52,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:52,249 INFO L225 Difference]: With dead ends: 59 [2020-12-23 06:54:52,249 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 06:54:52,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:54:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 06:54:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-12-23 06:54:52,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:54:52,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-12-23 06:54:52,257 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 24 [2020-12-23 06:54:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:52,258 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-12-23 06:54:52,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:54:52,258 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-12-23 06:54:52,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:54:52,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:52,259 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:52,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:52,475 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:52,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:52,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1976024800, now seen corresponding path program 3 times [2020-12-23 06:54:52,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:52,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761633191] [2020-12-23 06:54:52,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:52,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761633191] [2020-12-23 06:54:52,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118119221] [2020-12-23 06:54:52,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:52,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:54:52,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:52,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:54:52,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:52,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:52,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-12-23 06:54:52,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521684032] [2020-12-23 06:54:52,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:54:52,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:52,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:54:52,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:54:52,806 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 15 states. [2020-12-23 06:54:52,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:52,965 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2020-12-23 06:54:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:54:52,966 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-12-23 06:54:52,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:52,968 INFO L225 Difference]: With dead ends: 68 [2020-12-23 06:54:52,968 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 06:54:52,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:54:52,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 06:54:52,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2020-12-23 06:54:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 06:54:52,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-12-23 06:54:52,982 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 30 [2020-12-23 06:54:52,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:52,982 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-12-23 06:54:52,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:54:52,982 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-12-23 06:54:52,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 06:54:52,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:52,983 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:53,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:53,191 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:53,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:53,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1350589691, now seen corresponding path program 4 times [2020-12-23 06:54:53,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:53,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666401678] [2020-12-23 06:54:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:53,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666401678] [2020-12-23 06:54:53,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109763660] [2020-12-23 06:54:53,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:53,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:54:53,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:53,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:54:53,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:53,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:53,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-23 06:54:53,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672566463] [2020-12-23 06:54:53,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:54:53,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:53,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:54:53,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:54:53,435 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2020-12-23 06:54:53,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:53,542 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-12-23 06:54:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:54:53,542 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-12-23 06:54:53,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:53,543 INFO L225 Difference]: With dead ends: 46 [2020-12-23 06:54:53,543 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 06:54:53,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:54:53,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 06:54:53,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-12-23 06:54:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 06:54:53,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-12-23 06:54:53,551 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 32 [2020-12-23 06:54:53,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:53,552 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-12-23 06:54:53,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:54:53,552 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-12-23 06:54:53,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 06:54:53,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:53,553 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:53,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:53,768 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:53,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:53,769 INFO L82 PathProgramCache]: Analyzing trace with hash -498130965, now seen corresponding path program 5 times [2020-12-23 06:54:53,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:53,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323175154] [2020-12-23 06:54:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 38 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:54,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323175154] [2020-12-23 06:54:54,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367135365] [2020-12-23 06:54:54,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:54,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:54:54,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:54,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:54:54,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:54,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:54,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2020-12-23 06:54:54,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144183389] [2020-12-23 06:54:54,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:54:54,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:54,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:54:54,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:54:54,251 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 20 states. [2020-12-23 06:54:54,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:54,421 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-12-23 06:54:54,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:54:54,422 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2020-12-23 06:54:54,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:54,423 INFO L225 Difference]: With dead ends: 88 [2020-12-23 06:54:54,423 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 06:54:54,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:54:54,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 06:54:54,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 43. [2020-12-23 06:54:54,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 06:54:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-12-23 06:54:54,431 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 40 [2020-12-23 06:54:54,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:54,432 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-12-23 06:54:54,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:54:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-12-23 06:54:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 06:54:54,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:54,433 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:54,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:54,649 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:54,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:54,651 INFO L82 PathProgramCache]: Analyzing trace with hash 858072976, now seen corresponding path program 6 times [2020-12-23 06:54:54,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:54,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346510220] [2020-12-23 06:54:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 38 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:54,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346510220] [2020-12-23 06:54:54,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789102524] [2020-12-23 06:54:54,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:54,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 06:54:54,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:54,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:54:54,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 50 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:55,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:55,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2020-12-23 06:54:55,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177726098] [2020-12-23 06:54:55,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:54:55,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:55,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:54:55,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:54:55,072 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 21 states. [2020-12-23 06:54:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:55,276 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2020-12-23 06:54:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:54:55,277 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-12-23 06:54:55,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:55,278 INFO L225 Difference]: With dead ends: 96 [2020-12-23 06:54:55,278 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 06:54:55,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:54:55,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 06:54:55,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2020-12-23 06:54:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 06:54:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-12-23 06:54:55,286 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 42 [2020-12-23 06:54:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:55,286 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-12-23 06:54:55,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:54:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-12-23 06:54:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 06:54:55,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:55,288 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:55,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:55,502 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:55,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:55,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1499997707, now seen corresponding path program 7 times [2020-12-23 06:54:55,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:55,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020048399] [2020-12-23 06:54:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:55,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020048399] [2020-12-23 06:54:55,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562379857] [2020-12-23 06:54:55,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:55,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 06:54:55,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:55,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:55,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-12-23 06:54:55,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914601242] [2020-12-23 06:54:55,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:54:55,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:55,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:54:55,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:54:55,783 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 12 states. [2020-12-23 06:54:55,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:55,922 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-12-23 06:54:55,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:54:55,923 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-12-23 06:54:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:55,924 INFO L225 Difference]: With dead ends: 58 [2020-12-23 06:54:55,924 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 06:54:55,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:54:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 06:54:55,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-12-23 06:54:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 06:54:55,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-12-23 06:54:55,933 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 44 [2020-12-23 06:54:55,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:55,934 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-12-23 06:54:55,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:54:55,934 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-12-23 06:54:55,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 06:54:55,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:55,935 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:56,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 06:54:56,151 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:56,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:56,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1325832485, now seen corresponding path program 8 times [2020-12-23 06:54:56,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:56,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756444020] [2020-12-23 06:54:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 80 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:56,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756444020] [2020-12-23 06:54:56,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075326953] [2020-12-23 06:54:56,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:56,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:54:56,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:56,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:54:56,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 96 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:54:56,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:56,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2020-12-23 06:54:56,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679705795] [2020-12-23 06:54:56,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:54:56,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:56,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:54:56,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:54:56,697 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 25 states. [2020-12-23 06:54:56,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:56,936 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2020-12-23 06:54:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:54:56,937 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 52 [2020-12-23 06:54:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:56,938 INFO L225 Difference]: With dead ends: 116 [2020-12-23 06:54:56,938 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 06:54:56,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:54:56,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 06:54:56,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2020-12-23 06:54:56,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 06:54:56,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-12-23 06:54:56,947 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 52 [2020-12-23 06:54:56,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:56,947 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-12-23 06:54:56,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:54:56,947 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-12-23 06:54:56,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 06:54:56,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:56,951 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:57,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 06:54:57,166 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:57,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:57,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1066393856, now seen corresponding path program 9 times [2020-12-23 06:54:57,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:57,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532911640] [2020-12-23 06:54:57,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 80 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:57,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532911640] [2020-12-23 06:54:57,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063567432] [2020-12-23 06:54:57,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:57,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 06:54:57,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:57,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 06:54:57,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:57,750 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 98 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:57,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:57,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2020-12-23 06:54:57,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738469887] [2020-12-23 06:54:57,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:54:57,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:57,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:54:57,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:54:57,752 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 27 states. [2020-12-23 06:54:58,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:58,016 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2020-12-23 06:54:58,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:54:58,016 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 54 [2020-12-23 06:54:58,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:58,017 INFO L225 Difference]: With dead ends: 124 [2020-12-23 06:54:58,017 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 06:54:58,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:54:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 06:54:58,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-12-23 06:54:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 06:54:58,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-12-23 06:54:58,026 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 54 [2020-12-23 06:54:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:58,026 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-12-23 06:54:58,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:54:58,026 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-12-23 06:54:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 06:54:58,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:58,027 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:58,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:58,237 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:58,238 INFO L82 PathProgramCache]: Analyzing trace with hash -853974555, now seen corresponding path program 10 times [2020-12-23 06:54:58,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:58,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430059486] [2020-12-23 06:54:58,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 56 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:58,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430059486] [2020-12-23 06:54:58,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434333907] [2020-12-23 06:54:58,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:54:58,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:54:58,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:58,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:54:58,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:58,548 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 72 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:58,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:58,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-23 06:54:58,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585126952] [2020-12-23 06:54:58,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:54:58,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:58,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:54:58,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:54:58,551 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 14 states. [2020-12-23 06:54:58,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:58,728 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-12-23 06:54:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:54:58,729 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-12-23 06:54:58,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:58,730 INFO L225 Difference]: With dead ends: 70 [2020-12-23 06:54:58,730 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 06:54:58,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:54:58,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 06:54:58,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-12-23 06:54:58,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 06:54:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-12-23 06:54:58,747 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 56 [2020-12-23 06:54:58,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:58,748 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-12-23 06:54:58,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:54:58,748 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-12-23 06:54:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 06:54:58,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:58,750 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:58,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:58,964 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:58,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:58,965 INFO L82 PathProgramCache]: Analyzing trace with hash -584319285, now seen corresponding path program 11 times [2020-12-23 06:54:58,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:58,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046528827] [2020-12-23 06:54:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 138 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:59,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046528827] [2020-12-23 06:54:59,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42576464] [2020-12-23 06:54:59,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:59,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 06:54:59,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:59,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 06:54:59,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 162 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:59,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:59,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 32 [2020-12-23 06:54:59,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114759817] [2020-12-23 06:54:59,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:54:59,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:59,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:54:59,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:54:59,678 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 32 states. [2020-12-23 06:54:59,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:59,982 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2020-12-23 06:54:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:54:59,982 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 64 [2020-12-23 06:54:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:59,983 INFO L225 Difference]: With dead ends: 144 [2020-12-23 06:54:59,983 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 06:54:59,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:54:59,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 06:54:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 67. [2020-12-23 06:54:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 06:54:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-12-23 06:54:59,992 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 64 [2020-12-23 06:54:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:59,992 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-12-23 06:54:59,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:54:59,992 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-12-23 06:54:59,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 06:54:59,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:59,993 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:00,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:55:00,208 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:00,209 INFO L82 PathProgramCache]: Analyzing trace with hash 289318768, now seen corresponding path program 12 times [2020-12-23 06:55:00,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:00,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717244306] [2020-12-23 06:55:00,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 138 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:00,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717244306] [2020-12-23 06:55:00,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226561106] [2020-12-23 06:55:00,486 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 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 06:55:00,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 06:55:00,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:00,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:55:00,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 162 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:00,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:00,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 33 [2020-12-23 06:55:00,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770305853] [2020-12-23 06:55:00,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:55:00,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:00,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:55:00,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:55:00,952 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 33 states. [2020-12-23 06:55:01,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:01,313 INFO L93 Difference]: Finished difference Result 152 states and 176 transitions. [2020-12-23 06:55:01,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:55:01,313 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 66 [2020-12-23 06:55:01,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:01,314 INFO L225 Difference]: With dead ends: 152 [2020-12-23 06:55:01,314 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 06:55:01,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=457, Invalid=1349, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:55:01,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 06:55:01,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 69. [2020-12-23 06:55:01,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 06:55:01,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-12-23 06:55:01,322 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 66 [2020-12-23 06:55:01,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:01,322 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-12-23 06:55:01,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:55:01,323 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-12-23 06:55:01,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 06:55:01,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:01,324 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:01,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 06:55:01,539 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:01,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:01,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1958102315, now seen corresponding path program 13 times [2020-12-23 06:55:01,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:01,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637249048] [2020-12-23 06:55:01,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 90 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:01,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637249048] [2020-12-23 06:55:01,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934474488] [2020-12-23 06:55:01,709 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 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 06:55:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:01,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 06:55:01,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 110 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:01,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:01,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-12-23 06:55:01,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904907327] [2020-12-23 06:55:01,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:55:01,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:01,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:55:01,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:55:01,879 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 16 states. [2020-12-23 06:55:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:02,158 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2020-12-23 06:55:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 06:55:02,159 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-12-23 06:55:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:02,160 INFO L225 Difference]: With dead ends: 82 [2020-12-23 06:55:02,160 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 06:55:02,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=451, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:55:02,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 06:55:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-12-23 06:55:02,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 06:55:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-12-23 06:55:02,176 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 68 [2020-12-23 06:55:02,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:02,176 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-12-23 06:55:02,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:55:02,176 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-12-23 06:55:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 06:55:02,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:02,177 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:02,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:55:02,391 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:02,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:02,392 INFO L82 PathProgramCache]: Analyzing trace with hash -240359493, now seen corresponding path program 14 times [2020-12-23 06:55:02,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:02,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245164732] [2020-12-23 06:55:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 212 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:02,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245164732] [2020-12-23 06:55:02,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339346614] [2020-12-23 06:55:02,754 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 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 06:55:02,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:55:02,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:02,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:55:02,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 240 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:55:03,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:03,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2020-12-23 06:55:03,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442366171] [2020-12-23 06:55:03,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 06:55:03,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:03,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 06:55:03,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1029, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:55:03,321 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 37 states. [2020-12-23 06:55:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:03,799 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2020-12-23 06:55:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:55:03,800 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 76 [2020-12-23 06:55:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:03,801 INFO L225 Difference]: With dead ends: 172 [2020-12-23 06:55:03,801 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 06:55:03,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=558, Invalid=1698, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:55:03,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 06:55:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 79. [2020-12-23 06:55:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 06:55:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-12-23 06:55:03,814 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 76 [2020-12-23 06:55:03,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:03,815 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-12-23 06:55:03,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 06:55:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-12-23 06:55:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 06:55:03,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:03,816 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:04,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:04,032 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:04,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1366704352, now seen corresponding path program 15 times [2020-12-23 06:55:04,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:04,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369141188] [2020-12-23 06:55:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 212 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:04,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369141188] [2020-12-23 06:55:04,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451025047] [2020-12-23 06:55:04,479 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 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 06:55:04,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 06:55:04,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:04,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 06:55:04,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 242 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:05,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:05,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 39 [2020-12-23 06:55:05,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649540580] [2020-12-23 06:55:05,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:55:05,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:05,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:55:05,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1141, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:55:05,129 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 39 states. [2020-12-23 06:55:05,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:05,628 INFO L93 Difference]: Finished difference Result 180 states and 208 transitions. [2020-12-23 06:55:05,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 06:55:05,628 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 78 [2020-12-23 06:55:05,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:05,629 INFO L225 Difference]: With dead ends: 180 [2020-12-23 06:55:05,629 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 06:55:05,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=643, Invalid=1907, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:55:05,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 06:55:05,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-12-23 06:55:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 06:55:05,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-12-23 06:55:05,637 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 78 [2020-12-23 06:55:05,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:05,638 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-12-23 06:55:05,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:55:05,638 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-12-23 06:55:05,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 06:55:05,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:05,639 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:05,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:55:05,853 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:05,854 INFO L82 PathProgramCache]: Analyzing trace with hash -433167163, now seen corresponding path program 16 times [2020-12-23 06:55:05,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:05,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631186021] [2020-12-23 06:55:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 132 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:06,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631186021] [2020-12-23 06:55:06,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557541229] [2020-12-23 06:55:06,064 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 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 06:55:06,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:55:06,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:55:06,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 156 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:06,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:06,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-23 06:55:06,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207164507] [2020-12-23 06:55:06,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:55:06,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:06,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:55:06,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:55:06,268 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 18 states. [2020-12-23 06:55:06,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:06,531 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2020-12-23 06:55:06,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:55:06,532 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-23 06:55:06,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:06,533 INFO L225 Difference]: With dead ends: 94 [2020-12-23 06:55:06,533 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 06:55:06,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=334, Invalid=596, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:55:06,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 06:55:06,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2020-12-23 06:55:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 06:55:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-12-23 06:55:06,541 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 80 [2020-12-23 06:55:06,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:06,541 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-12-23 06:55:06,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:55:06,542 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-12-23 06:55:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 06:55:06,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:06,543 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:06,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:06,757 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:06,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:06,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1442849195, now seen corresponding path program 17 times [2020-12-23 06:55:06,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:06,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967762317] [2020-12-23 06:55:06,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 302 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:07,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967762317] [2020-12-23 06:55:07,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307977029] [2020-12-23 06:55:07,209 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 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 06:55:07,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-23 06:55:07,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:07,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 06:55:07,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 338 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:07,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:07,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 44 [2020-12-23 06:55:07,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993267423] [2020-12-23 06:55:07,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 06:55:07,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:07,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 06:55:07,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1455, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:55:07,941 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 44 states. [2020-12-23 06:55:08,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:08,470 INFO L93 Difference]: Finished difference Result 200 states and 230 transitions. [2020-12-23 06:55:08,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:55:08,471 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 88 [2020-12-23 06:55:08,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:08,472 INFO L225 Difference]: With dead ends: 200 [2020-12-23 06:55:08,472 INFO L226 Difference]: Without dead ends: 143 [2020-12-23 06:55:08,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=790, Invalid=2402, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:55:08,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-23 06:55:08,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 91. [2020-12-23 06:55:08,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 06:55:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-12-23 06:55:08,481 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 88 [2020-12-23 06:55:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:08,481 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-12-23 06:55:08,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 06:55:08,482 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-12-23 06:55:08,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 06:55:08,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:08,483 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:08,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:08,697 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:08,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:08,698 INFO L82 PathProgramCache]: Analyzing trace with hash -641963184, now seen corresponding path program 18 times [2020-12-23 06:55:08,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:08,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126456309] [2020-12-23 06:55:08,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 302 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:09,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126456309] [2020-12-23 06:55:09,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591216364] [2020-12-23 06:55:09,260 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 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 06:55:09,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-12-23 06:55:09,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:09,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:55:09,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:10,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:10,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 45 [2020-12-23 06:55:10,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508585644] [2020-12-23 06:55:10,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 06:55:10,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:10,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 06:55:10,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1527, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:55:10,021 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 45 states. [2020-12-23 06:55:10,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:10,630 INFO L93 Difference]: Finished difference Result 208 states and 240 transitions. [2020-12-23 06:55:10,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:55:10,630 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 90 [2020-12-23 06:55:10,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:10,632 INFO L225 Difference]: With dead ends: 208 [2020-12-23 06:55:10,632 INFO L226 Difference]: Without dead ends: 149 [2020-12-23 06:55:10,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=861, Invalid=2561, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:55:10,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-23 06:55:10,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 93. [2020-12-23 06:55:10,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 06:55:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-12-23 06:55:10,640 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 90 [2020-12-23 06:55:10,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:10,641 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-12-23 06:55:10,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 06:55:10,641 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-12-23 06:55:10,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-23 06:55:10,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:10,642 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:10,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 06:55:10,857 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:10,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:10,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1603067829, now seen corresponding path program 19 times [2020-12-23 06:55:10,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:10,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346973410] [2020-12-23 06:55:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 182 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:11,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346973410] [2020-12-23 06:55:11,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342959137] [2020-12-23 06:55:11,095 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 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 06:55:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:11,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:55:11,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:11,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:11,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-23 06:55:11,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493548200] [2020-12-23 06:55:11,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:55:11,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:11,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:55:11,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:55:11,317 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 20 states. [2020-12-23 06:55:11,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:11,614 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-12-23 06:55:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:55:11,614 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2020-12-23 06:55:11,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:11,615 INFO L225 Difference]: With dead ends: 106 [2020-12-23 06:55:11,615 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 06:55:11,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=429, Invalid=761, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:55:11,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 06:55:11,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2020-12-23 06:55:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 06:55:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-12-23 06:55:11,623 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 92 [2020-12-23 06:55:11,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:11,624 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-12-23 06:55:11,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:55:11,624 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-12-23 06:55:11,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 06:55:11,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:11,625 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:11,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:11,840 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:11,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:11,841 INFO L82 PathProgramCache]: Analyzing trace with hash 778874011, now seen corresponding path program 20 times [2020-12-23 06:55:11,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:11,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094633488] [2020-12-23 06:55:11,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 408 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:12,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094633488] [2020-12-23 06:55:12,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923271474] [2020-12-23 06:55:12,361 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 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 06:55:12,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:55:12,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:12,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 06:55:12,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 448 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:55:13,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:13,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2020-12-23 06:55:13,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688450644] [2020-12-23 06:55:13,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 06:55:13,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:13,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 06:55:13,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=1821, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:55:13,193 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 49 states. [2020-12-23 06:55:13,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:13,810 INFO L93 Difference]: Finished difference Result 228 states and 262 transitions. [2020-12-23 06:55:13,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 06:55:13,810 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 100 [2020-12-23 06:55:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:13,814 INFO L225 Difference]: With dead ends: 228 [2020-12-23 06:55:13,814 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 06:55:13,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=998, Invalid=3034, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:55:13,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 06:55:13,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 103. [2020-12-23 06:55:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 06:55:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-12-23 06:55:13,826 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 100 [2020-12-23 06:55:13,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:13,826 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-12-23 06:55:13,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 06:55:13,826 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-12-23 06:55:13,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-23 06:55:13,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:13,828 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:14,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 06:55:14,045 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:14,046 INFO L82 PathProgramCache]: Analyzing trace with hash 259434176, now seen corresponding path program 21 times [2020-12-23 06:55:14,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:14,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080210777] [2020-12-23 06:55:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 408 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:14,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080210777] [2020-12-23 06:55:14,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054822467] [2020-12-23 06:55:14,651 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 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 06:55:14,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 06:55:14,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:14,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:55:14,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 450 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:15,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:15,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 51 [2020-12-23 06:55:15,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890804930] [2020-12-23 06:55:15,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 06:55:15,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:15,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 06:55:15,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1969, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:55:15,518 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 51 states. [2020-12-23 06:55:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:16,277 INFO L93 Difference]: Finished difference Result 236 states and 272 transitions. [2020-12-23 06:55:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:55:16,277 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 102 [2020-12-23 06:55:16,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:16,279 INFO L225 Difference]: With dead ends: 236 [2020-12-23 06:55:16,279 INFO L226 Difference]: Without dead ends: 169 [2020-12-23 06:55:16,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1111, Invalid=3311, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:55:16,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-23 06:55:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 105. [2020-12-23 06:55:16,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 06:55:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-12-23 06:55:16,289 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 102 [2020-12-23 06:55:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:16,289 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-12-23 06:55:16,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 06:55:16,289 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-12-23 06:55:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 06:55:16,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:16,290 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:16,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 06:55:16,504 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:16,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:16,505 INFO L82 PathProgramCache]: Analyzing trace with hash -706040923, now seen corresponding path program 22 times [2020-12-23 06:55:16,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:16,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44855776] [2020-12-23 06:55:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 240 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:16,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44855776] [2020-12-23 06:55:16,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445327799] [2020-12-23 06:55:16,777 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 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 06:55:16,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:55:16,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:16,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 06:55:16,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:17,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:17,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-12-23 06:55:17,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146061016] [2020-12-23 06:55:17,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:55:17,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:17,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:55:17,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:55:17,023 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 22 states. [2020-12-23 06:55:17,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:17,400 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-12-23 06:55:17,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:55:17,401 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 104 [2020-12-23 06:55:17,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:17,402 INFO L225 Difference]: With dead ends: 118 [2020-12-23 06:55:17,403 INFO L226 Difference]: Without dead ends: 116 [2020-12-23 06:55:17,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=536, Invalid=946, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:55:17,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-23 06:55:17,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2020-12-23 06:55:17,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 06:55:17,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2020-12-23 06:55:17,412 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 104 [2020-12-23 06:55:17,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:17,412 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2020-12-23 06:55:17,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:55:17,412 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2020-12-23 06:55:17,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 06:55:17,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:17,413 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:17,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:17,627 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:17,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:17,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1006078091, now seen corresponding path program 23 times [2020-12-23 06:55:17,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:17,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807038982] [2020-12-23 06:55:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 530 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:18,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807038982] [2020-12-23 06:55:18,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802169989] [2020-12-23 06:55:18,347 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 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 06:55:18,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 06:55:18,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:18,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 06:55:18,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 578 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:19,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:19,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 56 [2020-12-23 06:55:19,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449360136] [2020-12-23 06:55:19,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 06:55:19,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:19,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 06:55:19,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=2375, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:55:19,429 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand 56 states. [2020-12-23 06:55:20,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:20,167 INFO L93 Difference]: Finished difference Result 256 states and 294 transitions. [2020-12-23 06:55:20,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 06:55:20,168 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 112 [2020-12-23 06:55:20,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:20,169 INFO L225 Difference]: With dead ends: 256 [2020-12-23 06:55:20,169 INFO L226 Difference]: Without dead ends: 183 [2020-12-23 06:55:20,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1302, Invalid=3954, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:55:20,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-23 06:55:20,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 115. [2020-12-23 06:55:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 06:55:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2020-12-23 06:55:20,182 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 112 [2020-12-23 06:55:20,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:20,182 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2020-12-23 06:55:20,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 06:55:20,182 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2020-12-23 06:55:20,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-23 06:55:20,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:20,183 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:20,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 06:55:20,398 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:20,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:20,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1154118448, now seen corresponding path program 24 times [2020-12-23 06:55:20,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:20,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196543024] [2020-12-23 06:55:20,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 530 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:21,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196543024] [2020-12-23 06:55:21,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443927964] [2020-12-23 06:55:21,148 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 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 06:55:21,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-12-23 06:55:21,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:21,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 06:55:21,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:22,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:22,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 57 [2020-12-23 06:55:22,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427831131] [2020-12-23 06:55:22,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 06:55:22,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:22,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 06:55:22,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2467, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:55:22,290 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand 57 states. [2020-12-23 06:55:23,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:23,207 INFO L93 Difference]: Finished difference Result 264 states and 304 transitions. [2020-12-23 06:55:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:55:23,207 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 114 [2020-12-23 06:55:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:23,208 INFO L225 Difference]: With dead ends: 264 [2020-12-23 06:55:23,209 INFO L226 Difference]: Without dead ends: 189 [2020-12-23 06:55:23,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1393, Invalid=4157, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 06:55:23,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-12-23 06:55:23,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 117. [2020-12-23 06:55:23,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 06:55:23,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-12-23 06:55:23,220 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 114 [2020-12-23 06:55:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:23,220 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-12-23 06:55:23,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 06:55:23,221 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-12-23 06:55:23,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 06:55:23,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:23,222 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:23,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:23,435 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:23,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:23,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1686980757, now seen corresponding path program 25 times [2020-12-23 06:55:23,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:23,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724617904] [2020-12-23 06:55:23,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 306 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:23,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724617904] [2020-12-23 06:55:23,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393394104] [2020-12-23 06:55:23,747 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 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 06:55:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:23,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 06:55:23,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:24,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:24,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-12-23 06:55:24,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889032699] [2020-12-23 06:55:24,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:55:24,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:24,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:55:24,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:55:24,013 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 24 states. [2020-12-23 06:55:24,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:24,455 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2020-12-23 06:55:24,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:55:24,456 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 116 [2020-12-23 06:55:24,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:24,457 INFO L225 Difference]: With dead ends: 130 [2020-12-23 06:55:24,457 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 06:55:24,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=655, Invalid=1151, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:55:24,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 06:55:24,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2020-12-23 06:55:24,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 06:55:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2020-12-23 06:55:24,467 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 116 [2020-12-23 06:55:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:24,468 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2020-12-23 06:55:24,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:55:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2020-12-23 06:55:24,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 06:55:24,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:24,469 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:24,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:55:24,678 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:24,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:24,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1134152325, now seen corresponding path program 26 times [2020-12-23 06:55:24,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:24,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511832080] [2020-12-23 06:55:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 668 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:25,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511832080] [2020-12-23 06:55:25,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735190524] [2020-12-23 06:55:25,519 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 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 06:55:25,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:55:25,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:25,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:55:25,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 720 proven. 342 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:55:26,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:26,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 61 [2020-12-23 06:55:26,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779603940] [2020-12-23 06:55:26,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 06:55:26,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:26,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 06:55:26,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=823, Invalid=2837, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:55:26,746 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand 61 states. [2020-12-23 06:55:27,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:27,692 INFO L93 Difference]: Finished difference Result 284 states and 326 transitions. [2020-12-23 06:55:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 06:55:27,692 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 124 [2020-12-23 06:55:27,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:27,694 INFO L225 Difference]: With dead ends: 284 [2020-12-23 06:55:27,694 INFO L226 Difference]: Without dead ends: 203 [2020-12-23 06:55:27,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1566, Invalid=4754, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:55:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-23 06:55:27,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 127. [2020-12-23 06:55:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 06:55:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-12-23 06:55:27,713 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 124 [2020-12-23 06:55:27,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:27,714 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-12-23 06:55:27,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 06:55:27,714 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-12-23 06:55:27,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-23 06:55:27,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:27,715 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:27,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:55:27,927 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:27,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:27,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1734520672, now seen corresponding path program 27 times [2020-12-23 06:55:27,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:27,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501080576] [2020-12-23 06:55:27,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 668 proven. 434 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:28,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501080576] [2020-12-23 06:55:28,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207622152] [2020-12-23 06:55:28,772 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 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 06:55:28,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-12-23 06:55:28,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:28,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:55:28,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 722 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:30,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:30,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 63 [2020-12-23 06:55:30,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664545262] [2020-12-23 06:55:30,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 06:55:30,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:30,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 06:55:30,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=3021, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:55:30,188 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand 63 states. [2020-12-23 06:55:31,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:31,279 INFO L93 Difference]: Finished difference Result 292 states and 336 transitions. [2020-12-23 06:55:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:55:31,279 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 126 [2020-12-23 06:55:31,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:31,281 INFO L225 Difference]: With dead ends: 292 [2020-12-23 06:55:31,281 INFO L226 Difference]: Without dead ends: 209 [2020-12-23 06:55:31,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1707, Invalid=5099, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 06:55:31,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-23 06:55:31,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 129. [2020-12-23 06:55:31,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-23 06:55:31,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2020-12-23 06:55:31,293 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 126 [2020-12-23 06:55:31,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:31,293 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2020-12-23 06:55:31,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 06:55:31,293 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2020-12-23 06:55:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-23 06:55:31,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:31,294 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:31,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:31,507 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:31,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:31,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1132082821, now seen corresponding path program 28 times [2020-12-23 06:55:31,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:31,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460932280] [2020-12-23 06:55:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 380 proven. 762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:31,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460932280] [2020-12-23 06:55:31,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628629219] [2020-12-23 06:55:31,904 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 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 06:55:32,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:55:32,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:32,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:55:32,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:32,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:32,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-12-23 06:55:32,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253770877] [2020-12-23 06:55:32,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:55:32,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:32,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:55:32,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:55:32,189 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand 26 states. [2020-12-23 06:55:32,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:32,712 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2020-12-23 06:55:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 06:55:32,713 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 128 [2020-12-23 06:55:32,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:32,714 INFO L225 Difference]: With dead ends: 142 [2020-12-23 06:55:32,714 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 06:55:32,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=786, Invalid=1376, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:55:32,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 06:55:32,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-12-23 06:55:32,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 06:55:32,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2020-12-23 06:55:32,725 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 128 [2020-12-23 06:55:32,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:32,725 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2020-12-23 06:55:32,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:55:32,725 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2020-12-23 06:55:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 06:55:32,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:32,726 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:32,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:32,941 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:32,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:32,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1245590379, now seen corresponding path program 29 times [2020-12-23 06:55:32,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:32,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877617591] [2020-12-23 06:55:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 822 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:34,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877617591] [2020-12-23 06:55:34,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030519939] [2020-12-23 06:55:34,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:55:34,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-12-23 06:55:34,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:34,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 06:55:34,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 882 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:35,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:35,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 68 [2020-12-23 06:55:35,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967396324] [2020-12-23 06:55:35,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 06:55:35,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:35,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 06:55:35,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=3519, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:55:35,623 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand 68 states. [2020-12-23 06:55:36,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:36,763 INFO L93 Difference]: Finished difference Result 312 states and 358 transitions. [2020-12-23 06:55:36,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 06:55:36,764 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 136 [2020-12-23 06:55:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:36,765 INFO L225 Difference]: With dead ends: 312 [2020-12-23 06:55:36,765 INFO L226 Difference]: Without dead ends: 223 [2020-12-23 06:55:36,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1942, Invalid=5890, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 06:55:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-23 06:55:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 139. [2020-12-23 06:55:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 06:55:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2020-12-23 06:55:36,778 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 136 [2020-12-23 06:55:36,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:36,778 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2020-12-23 06:55:36,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 06:55:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2020-12-23 06:55:36,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 06:55:36,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:36,780 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:36,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 06:55:36,993 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:36,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:36,994 INFO L82 PathProgramCache]: Analyzing trace with hash -694894832, now seen corresponding path program 30 times [2020-12-23 06:55:36,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:36,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060882322] [2020-12-23 06:55:36,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 822 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:38,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060882322] [2020-12-23 06:55:38,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383210268] [2020-12-23 06:55:38,116 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 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 06:55:38,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-12-23 06:55:38,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:38,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:55:38,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 882 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:39,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:39,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 69 [2020-12-23 06:55:39,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004975862] [2020-12-23 06:55:39,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 06:55:39,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:39,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 06:55:39,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=3631, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:55:39,752 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand 69 states. [2020-12-23 06:55:41,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:41,008 INFO L93 Difference]: Finished difference Result 320 states and 368 transitions. [2020-12-23 06:55:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 06:55:41,008 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 138 [2020-12-23 06:55:41,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:41,010 INFO L225 Difference]: With dead ends: 320 [2020-12-23 06:55:41,010 INFO L226 Difference]: Without dead ends: 229 [2020-12-23 06:55:41,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2053, Invalid=6137, Unknown=0, NotChecked=0, Total=8190 [2020-12-23 06:55:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-12-23 06:55:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 141. [2020-12-23 06:55:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 06:55:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2020-12-23 06:55:41,023 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 138 [2020-12-23 06:55:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:41,023 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2020-12-23 06:55:41,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 06:55:41,024 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2020-12-23 06:55:41,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-23 06:55:41,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:41,024 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:41,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:41,231 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:41,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:41,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1485376139, now seen corresponding path program 31 times [2020-12-23 06:55:41,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:41,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605185176] [2020-12-23 06:55:41,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 462 proven. 926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:41,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605185176] [2020-12-23 06:55:41,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045650085] [2020-12-23 06:55:41,676 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 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 06:55:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:41,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 06:55:41,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:42,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:42,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-12-23 06:55:42,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232632589] [2020-12-23 06:55:42,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:55:42,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:42,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:55:42,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:55:42,016 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand 28 states. [2020-12-23 06:55:42,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:42,661 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2020-12-23 06:55:42,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 06:55:42,663 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 140 [2020-12-23 06:55:42,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:42,664 INFO L225 Difference]: With dead ends: 154 [2020-12-23 06:55:42,664 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 06:55:42,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=929, Invalid=1621, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:55:42,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 06:55:42,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2020-12-23 06:55:42,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-23 06:55:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2020-12-23 06:55:42,678 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 140 [2020-12-23 06:55:42,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:42,678 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2020-12-23 06:55:42,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:55:42,678 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2020-12-23 06:55:42,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 06:55:42,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:42,679 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:42,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 06:55:42,893 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:42,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:42,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1127939493, now seen corresponding path program 32 times [2020-12-23 06:55:42,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:42,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111735374] [2020-12-23 06:55:42,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:44,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 992 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:44,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111735374] [2020-12-23 06:55:44,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880658744] [2020-12-23 06:55:44,098 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 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 06:55:44,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:55:44,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:44,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 06:55:44,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:55:46,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:46,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 73 [2020-12-23 06:55:46,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165480568] [2020-12-23 06:55:46,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-23 06:55:46,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:46,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-23 06:55:46,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=4077, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:55:46,014 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand 73 states. [2020-12-23 06:55:47,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:47,335 INFO L93 Difference]: Finished difference Result 340 states and 390 transitions. [2020-12-23 06:55:47,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 06:55:47,336 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 148 [2020-12-23 06:55:47,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:47,337 INFO L225 Difference]: With dead ends: 340 [2020-12-23 06:55:47,337 INFO L226 Difference]: Without dead ends: 243 [2020-12-23 06:55:47,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2262, Invalid=6858, Unknown=0, NotChecked=0, Total=9120 [2020-12-23 06:55:47,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-12-23 06:55:47,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 151. [2020-12-23 06:55:47,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 06:55:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2020-12-23 06:55:47,350 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 148 [2020-12-23 06:55:47,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:47,350 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2020-12-23 06:55:47,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-23 06:55:47,350 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2020-12-23 06:55:47,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-23 06:55:47,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:47,351 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:47,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 06:55:47,552 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:47,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:47,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1461075584, now seen corresponding path program 33 times [2020-12-23 06:55:47,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:47,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853431984] [2020-12-23 06:55:47,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 992 proven. 618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:48,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853431984] [2020-12-23 06:55:48,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267367395] [2020-12-23 06:55:48,812 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 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 06:55:48,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-23 06:55:48,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:48,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 06:55:48,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 1058 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:50,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:50,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 75 [2020-12-23 06:55:50,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821119805] [2020-12-23 06:55:50,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 06:55:50,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:50,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 06:55:50,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1253, Invalid=4297, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 06:55:50,761 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand 75 states. [2020-12-23 06:55:52,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:52,273 INFO L93 Difference]: Finished difference Result 348 states and 400 transitions. [2020-12-23 06:55:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 06:55:52,273 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 150 [2020-12-23 06:55:52,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:52,275 INFO L225 Difference]: With dead ends: 348 [2020-12-23 06:55:52,275 INFO L226 Difference]: Without dead ends: 249 [2020-12-23 06:55:52,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2431, Invalid=7271, Unknown=0, NotChecked=0, Total=9702 [2020-12-23 06:55:52,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-12-23 06:55:52,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 153. [2020-12-23 06:55:52,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 06:55:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2020-12-23 06:55:52,289 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 150 [2020-12-23 06:55:52,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:52,289 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2020-12-23 06:55:52,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 06:55:52,289 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2020-12-23 06:55:52,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-23 06:55:52,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:52,290 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:52,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 06:55:52,505 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:52,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:52,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1576467099, now seen corresponding path program 34 times [2020-12-23 06:55:52,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:52,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257449461] [2020-12-23 06:55:52,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:53,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 552 proven. 1106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:53,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257449461] [2020-12-23 06:55:53,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889126808] [2020-12-23 06:55:53,059 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 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 06:55:53,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:55:53,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:53,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 06:55:53,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 600 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:53,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:53,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-12-23 06:55:53,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136120725] [2020-12-23 06:55:53,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:55:53,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:53,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:55:53,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:55:53,393 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand 30 states. [2020-12-23 06:55:54,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:54,067 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2020-12-23 06:55:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 06:55:54,067 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 152 [2020-12-23 06:55:54,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:54,068 INFO L225 Difference]: With dead ends: 166 [2020-12-23 06:55:54,069 INFO L226 Difference]: Without dead ends: 164 [2020-12-23 06:55:54,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1084, Invalid=1886, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:55:54,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-23 06:55:54,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2020-12-23 06:55:54,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-23 06:55:54,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2020-12-23 06:55:54,077 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 152 [2020-12-23 06:55:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:54,078 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2020-12-23 06:55:54,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:55:54,078 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2020-12-23 06:55:54,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-23 06:55:54,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:54,078 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:54,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 06:55:54,279 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:54,280 INFO L82 PathProgramCache]: Analyzing trace with hash 134226507, now seen corresponding path program 35 times [2020-12-23 06:55:54,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:54,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925071452] [2020-12-23 06:55:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1178 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:55,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925071452] [2020-12-23 06:55:55,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113961072] [2020-12-23 06:55:55,796 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 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 06:55:55,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2020-12-23 06:55:55,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:55,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 06:55:55,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1250 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:58,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:58,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 80 [2020-12-23 06:55:58,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110584784] [2020-12-23 06:55:58,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-23 06:55:58,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:58,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-23 06:55:58,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=4887, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:55:58,036 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand 80 states. [2020-12-23 06:55:59,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:59,640 INFO L93 Difference]: Finished difference Result 368 states and 422 transitions. [2020-12-23 06:55:59,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 06:55:59,640 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 160 [2020-12-23 06:55:59,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:59,643 INFO L225 Difference]: With dead ends: 368 [2020-12-23 06:55:59,643 INFO L226 Difference]: Without dead ends: 263 [2020-12-23 06:55:59,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2367 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2710, Invalid=8210, Unknown=0, NotChecked=0, Total=10920 [2020-12-23 06:55:59,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-23 06:55:59,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 163. [2020-12-23 06:55:59,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-23 06:55:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2020-12-23 06:55:59,660 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 160 [2020-12-23 06:55:59,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:59,660 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2020-12-23 06:55:59,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-23 06:55:59,660 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2020-12-23 06:55:59,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-23 06:55:59,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:59,661 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:59,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 06:55:59,875 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:59,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:59,876 INFO L82 PathProgramCache]: Analyzing trace with hash -548974864, now seen corresponding path program 36 times [2020-12-23 06:55:59,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:59,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040569751] [2020-12-23 06:55:59,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 1178 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:01,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040569751] [2020-12-23 06:56:01,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110212356] [2020-12-23 06:56:01,455 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 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 06:56:01,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2020-12-23 06:56:01,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:01,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 06:56:01,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 1250 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:03,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:03,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 81 [2020-12-23 06:56:03,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951999917] [2020-12-23 06:56:03,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-23 06:56:03,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:03,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-23 06:56:03,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1461, Invalid=5019, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 06:56:03,737 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand 81 states. [2020-12-23 06:56:05,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:05,414 INFO L93 Difference]: Finished difference Result 376 states and 432 transitions. [2020-12-23 06:56:05,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 06:56:05,414 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 162 [2020-12-23 06:56:05,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:05,416 INFO L225 Difference]: With dead ends: 376 [2020-12-23 06:56:05,416 INFO L226 Difference]: Without dead ends: 269 [2020-12-23 06:56:05,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2841, Invalid=8501, Unknown=0, NotChecked=0, Total=11342 [2020-12-23 06:56:05,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-12-23 06:56:05,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 165. [2020-12-23 06:56:05,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-23 06:56:05,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2020-12-23 06:56:05,430 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 162 [2020-12-23 06:56:05,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:05,431 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2020-12-23 06:56:05,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-23 06:56:05,431 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2020-12-23 06:56:05,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-23 06:56:05,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:05,432 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:05,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 06:56:05,646 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:05,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:05,647 INFO L82 PathProgramCache]: Analyzing trace with hash 24503893, now seen corresponding path program 37 times [2020-12-23 06:56:05,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:05,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590236880] [2020-12-23 06:56:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 650 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:06,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590236880] [2020-12-23 06:56:06,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254273795] [2020-12-23 06:56:06,260 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 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 06:56:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:06,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 06:56:06,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 702 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:06,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:06,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2020-12-23 06:56:06,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317375852] [2020-12-23 06:56:06,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:56:06,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:06,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:56:06,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:56:06,646 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand 32 states. [2020-12-23 06:56:07,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:07,360 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2020-12-23 06:56:07,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 06:56:07,361 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 164 [2020-12-23 06:56:07,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:07,364 INFO L225 Difference]: With dead ends: 178 [2020-12-23 06:56:07,364 INFO L226 Difference]: Without dead ends: 176 [2020-12-23 06:56:07,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1251, Invalid=2171, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:56:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-23 06:56:07,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2020-12-23 06:56:07,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-23 06:56:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2020-12-23 06:56:07,376 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 164 [2020-12-23 06:56:07,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:07,377 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2020-12-23 06:56:07,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:56:07,377 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2020-12-23 06:56:07,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-23 06:56:07,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:07,378 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:07,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 06:56:07,583 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:07,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:07,583 INFO L82 PathProgramCache]: Analyzing trace with hash 481628987, now seen corresponding path program 38 times [2020-12-23 06:56:07,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:07,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021319129] [2020-12-23 06:56:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1380 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:09,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021319129] [2020-12-23 06:56:09,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638355512] [2020-12-23 06:56:09,330 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 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 06:56:09,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:56:09,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:09,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 06:56:09,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1456 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:56:11,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:11,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 85 [2020-12-23 06:56:11,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021005288] [2020-12-23 06:56:11,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-23 06:56:11,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:11,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-23 06:56:11,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1599, Invalid=5541, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 06:56:11,767 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand 85 states. [2020-12-23 06:56:13,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:13,583 INFO L93 Difference]: Finished difference Result 396 states and 454 transitions. [2020-12-23 06:56:13,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 06:56:13,584 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 172 [2020-12-23 06:56:13,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:13,592 INFO L225 Difference]: With dead ends: 396 [2020-12-23 06:56:13,592 INFO L226 Difference]: Without dead ends: 283 [2020-12-23 06:56:13,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3086, Invalid=9346, Unknown=0, NotChecked=0, Total=12432 [2020-12-23 06:56:13,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-23 06:56:13,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 175. [2020-12-23 06:56:13,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 06:56:13,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2020-12-23 06:56:13,609 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 172 [2020-12-23 06:56:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:13,610 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2020-12-23 06:56:13,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-23 06:56:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2020-12-23 06:56:13,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-23 06:56:13,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:13,612 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:13,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:13,825 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:13,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:13,826 INFO L82 PathProgramCache]: Analyzing trace with hash -2129825696, now seen corresponding path program 39 times [2020-12-23 06:56:13,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:13,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634049485] [2020-12-23 06:56:13,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1380 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:15,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634049485] [2020-12-23 06:56:15,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317933710] [2020-12-23 06:56:15,736 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 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 06:56:15,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-23 06:56:15,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:15,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 06:56:15,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1458 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:18,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:18,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 87 [2020-12-23 06:56:18,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905611283] [2020-12-23 06:56:18,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-12-23 06:56:18,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:18,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-12-23 06:56:18,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1685, Invalid=5797, Unknown=0, NotChecked=0, Total=7482 [2020-12-23 06:56:18,375 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand 87 states. [2020-12-23 06:56:20,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:20,308 INFO L93 Difference]: Finished difference Result 404 states and 464 transitions. [2020-12-23 06:56:20,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 06:56:20,308 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 174 [2020-12-23 06:56:20,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:20,310 INFO L225 Difference]: With dead ends: 404 [2020-12-23 06:56:20,310 INFO L226 Difference]: Without dead ends: 289 [2020-12-23 06:56:20,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2806 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3283, Invalid=9827, Unknown=0, NotChecked=0, Total=13110 [2020-12-23 06:56:20,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-23 06:56:20,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 177. [2020-12-23 06:56:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 06:56:20,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2020-12-23 06:56:20,327 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 174 [2020-12-23 06:56:20,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:20,327 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2020-12-23 06:56:20,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-12-23 06:56:20,327 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2020-12-23 06:56:20,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-23 06:56:20,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:20,328 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:20,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:20,543 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:20,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:20,544 INFO L82 PathProgramCache]: Analyzing trace with hash 818092101, now seen corresponding path program 40 times [2020-12-23 06:56:20,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:20,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642490184] [2020-12-23 06:56:20,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 756 proven. 1514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:21,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642490184] [2020-12-23 06:56:21,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175034045] [2020-12-23 06:56:21,257 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 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 06:56:21,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:56:21,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:21,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 06:56:21,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 812 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:21,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:21,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2020-12-23 06:56:21,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678910068] [2020-12-23 06:56:21,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:56:21,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:21,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:56:21,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:56:21,656 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand 34 states. [2020-12-23 06:56:22,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:22,530 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2020-12-23 06:56:22,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 06:56:22,531 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 176 [2020-12-23 06:56:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:22,533 INFO L225 Difference]: With dead ends: 190 [2020-12-23 06:56:22,533 INFO L226 Difference]: Without dead ends: 188 [2020-12-23 06:56:22,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1430, Invalid=2476, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:56:22,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-23 06:56:22,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2020-12-23 06:56:22,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 06:56:22,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2020-12-23 06:56:22,549 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 176 [2020-12-23 06:56:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:22,549 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2020-12-23 06:56:22,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:56:22,550 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2020-12-23 06:56:22,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-23 06:56:22,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:22,551 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:22,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:22,765 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:22,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:22,766 INFO L82 PathProgramCache]: Analyzing trace with hash -932621013, now seen corresponding path program 41 times [2020-12-23 06:56:22,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:22,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460180664] [2020-12-23 06:56:22,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1598 proven. 896 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:24,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460180664] [2020-12-23 06:56:24,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673438211] [2020-12-23 06:56:24,760 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 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 06:56:24,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-23 06:56:24,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 06:56:24,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1682 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:27,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:27,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 92 [2020-12-23 06:56:27,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913071189] [2020-12-23 06:56:27,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-12-23 06:56:27,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:27,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-12-23 06:56:27,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=6479, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 06:56:27,757 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand 92 states. [2020-12-23 06:56:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:29,920 INFO L93 Difference]: Finished difference Result 424 states and 486 transitions. [2020-12-23 06:56:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 06:56:29,921 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 184 [2020-12-23 06:56:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:29,922 INFO L225 Difference]: With dead ends: 424 [2020-12-23 06:56:29,922 INFO L226 Difference]: Without dead ends: 303 [2020-12-23 06:56:29,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3153 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3606, Invalid=10914, Unknown=0, NotChecked=0, Total=14520 [2020-12-23 06:56:29,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-12-23 06:56:29,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 187. [2020-12-23 06:56:29,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-23 06:56:29,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2020-12-23 06:56:29,936 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 184 [2020-12-23 06:56:29,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:29,936 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2020-12-23 06:56:29,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-12-23 06:56:29,936 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2020-12-23 06:56:29,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-23 06:56:29,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:29,937 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:30,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 06:56:30,138 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:30,139 INFO L82 PathProgramCache]: Analyzing trace with hash 2064523984, now seen corresponding path program 42 times [2020-12-23 06:56:30,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:30,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637622948] [2020-12-23 06:56:30,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 1598 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:32,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637622948] [2020-12-23 06:56:32,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506761077] [2020-12-23 06:56:32,222 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 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 06:56:32,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2020-12-23 06:56:32,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:32,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 06:56:32,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 1682 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:35,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:35,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 93 [2020-12-23 06:56:35,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414545120] [2020-12-23 06:56:35,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-12-23 06:56:35,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:35,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-12-23 06:56:35,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1925, Invalid=6631, Unknown=0, NotChecked=0, Total=8556 [2020-12-23 06:56:35,257 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand 93 states. [2020-12-23 06:56:37,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:37,242 INFO L93 Difference]: Finished difference Result 432 states and 496 transitions. [2020-12-23 06:56:37,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 06:56:37,242 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 186 [2020-12-23 06:56:37,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:37,243 INFO L225 Difference]: With dead ends: 432 [2020-12-23 06:56:37,243 INFO L226 Difference]: Without dead ends: 309 [2020-12-23 06:56:37,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3217 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3757, Invalid=11249, Unknown=0, NotChecked=0, Total=15006 [2020-12-23 06:56:37,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-12-23 06:56:37,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 189. [2020-12-23 06:56:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-23 06:56:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 192 transitions. [2020-12-23 06:56:37,262 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 192 transitions. Word has length 186 [2020-12-23 06:56:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:37,262 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 192 transitions. [2020-12-23 06:56:37,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-12-23 06:56:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 192 transitions. [2020-12-23 06:56:37,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-23 06:56:37,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:37,264 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:37,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:37,478 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:37,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:37,479 INFO L82 PathProgramCache]: Analyzing trace with hash 397810485, now seen corresponding path program 43 times [2020-12-23 06:56:37,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:37,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114649630] [2020-12-23 06:56:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2612 backedges. 870 proven. 1742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:38,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114649630] [2020-12-23 06:56:38,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225011451] [2020-12-23 06:56:38,319 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 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 06:56:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:38,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 06:56:38,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2612 backedges. 930 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:38,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:38,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2020-12-23 06:56:38,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282606171] [2020-12-23 06:56:38,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 06:56:38,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:38,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 06:56:38,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:56:38,756 INFO L87 Difference]: Start difference. First operand 189 states and 192 transitions. Second operand 36 states. [2020-12-23 06:56:39,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:39,749 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2020-12-23 06:56:39,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 06:56:39,750 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 188 [2020-12-23 06:56:39,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:39,751 INFO L225 Difference]: With dead ends: 202 [2020-12-23 06:56:39,752 INFO L226 Difference]: Without dead ends: 200 [2020-12-23 06:56:39,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1621, Invalid=2801, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:56:39,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-23 06:56:39,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2020-12-23 06:56:39,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-23 06:56:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 200 transitions. [2020-12-23 06:56:39,770 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 200 transitions. Word has length 188 [2020-12-23 06:56:39,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:39,770 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 200 transitions. [2020-12-23 06:56:39,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 06:56:39,771 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 200 transitions. [2020-12-23 06:56:39,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-23 06:56:39,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:39,772 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:39,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:39,988 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:39,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:39,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1788712933, now seen corresponding path program 44 times [2020-12-23 06:56:39,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:39,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783044847] [2020-12-23 06:56:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 1832 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:42,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783044847] [2020-12-23 06:56:42,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201769522] [2020-12-23 06:56:42,303 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 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 06:56:42,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:56:42,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:42,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 06:56:42,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 1920 proven. 930 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:56:45,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:45,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64] total 97 [2020-12-23 06:56:45,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900060560] [2020-12-23 06:56:45,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-12-23 06:56:45,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:45,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-12-23 06:56:45,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2083, Invalid=7229, Unknown=0, NotChecked=0, Total=9312 [2020-12-23 06:56:45,565 INFO L87 Difference]: Start difference. First operand 197 states and 200 transitions. Second operand 97 states. [2020-12-23 06:56:47,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:47,983 INFO L93 Difference]: Finished difference Result 452 states and 518 transitions. [2020-12-23 06:56:47,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 06:56:47,984 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 196 [2020-12-23 06:56:47,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:47,985 INFO L225 Difference]: With dead ends: 452 [2020-12-23 06:56:47,985 INFO L226 Difference]: Without dead ends: 323 [2020-12-23 06:56:47,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3524 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4038, Invalid=12218, Unknown=0, NotChecked=0, Total=16256 [2020-12-23 06:56:47,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-12-23 06:56:48,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 199. [2020-12-23 06:56:48,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-23 06:56:48,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 202 transitions. [2020-12-23 06:56:48,004 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 202 transitions. Word has length 196 [2020-12-23 06:56:48,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:48,004 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 202 transitions. [2020-12-23 06:56:48,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-12-23 06:56:48,004 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 202 transitions. [2020-12-23 06:56:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-12-23 06:56:48,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:48,005 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:48,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 06:56:48,220 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:48,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:48,221 INFO L82 PathProgramCache]: Analyzing trace with hash 414115392, now seen corresponding path program 45 times [2020-12-23 06:56:48,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:48,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82809573] [2020-12-23 06:56:48,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 1832 proven. 1082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:50,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82809573] [2020-12-23 06:56:50,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880939858] [2020-12-23 06:56:50,632 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 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 06:56:50,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2020-12-23 06:56:50,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:50,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 06:56:50,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 1922 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:54,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:54,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 99 [2020-12-23 06:56:54,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187446029] [2020-12-23 06:56:54,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-12-23 06:56:54,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:54,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-12-23 06:56:54,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2181, Invalid=7521, Unknown=0, NotChecked=0, Total=9702 [2020-12-23 06:56:54,135 INFO L87 Difference]: Start difference. First operand 199 states and 202 transitions. Second operand 99 states. [2020-12-23 06:56:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:56,704 INFO L93 Difference]: Finished difference Result 460 states and 528 transitions. [2020-12-23 06:56:56,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 06:56:56,704 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 198 [2020-12-23 06:56:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:56,708 INFO L225 Difference]: With dead ends: 460 [2020-12-23 06:56:56,708 INFO L226 Difference]: Without dead ends: 329 [2020-12-23 06:56:56,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3656 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4263, Invalid=12767, Unknown=0, NotChecked=0, Total=17030 [2020-12-23 06:56:56,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-12-23 06:56:56,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 201. [2020-12-23 06:56:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-23 06:56:56,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 204 transitions. [2020-12-23 06:56:56,724 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 204 transitions. Word has length 198 [2020-12-23 06:56:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:56,724 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 204 transitions. [2020-12-23 06:56:56,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-12-23 06:56:56,725 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 204 transitions. [2020-12-23 06:56:56,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-12-23 06:56:56,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:56,725 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:56,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 06:56:56,926 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:56,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:56,927 INFO L82 PathProgramCache]: Analyzing trace with hash -86741211, now seen corresponding path program 46 times [2020-12-23 06:56:56,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:56,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624174919] [2020-12-23 06:56:56,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2978 backedges. 992 proven. 1986 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:57,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624174919] [2020-12-23 06:56:57,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916423112] [2020-12-23 06:56:57,862 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 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 06:56:58,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:56:58,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:58,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 06:56:58,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2978 backedges. 1056 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:58,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:58,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 38 [2020-12-23 06:56:58,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575664201] [2020-12-23 06:56:58,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:56:58,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:58,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:56:58,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:56:58,381 INFO L87 Difference]: Start difference. First operand 201 states and 204 transitions. Second operand 38 states. [2020-12-23 06:56:59,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:59,405 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2020-12-23 06:56:59,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 06:56:59,406 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 200 [2020-12-23 06:56:59,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:59,407 INFO L225 Difference]: With dead ends: 214 [2020-12-23 06:56:59,407 INFO L226 Difference]: Without dead ends: 212 [2020-12-23 06:56:59,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1824, Invalid=3146, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:56:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-23 06:56:59,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 209. [2020-12-23 06:56:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-23 06:56:59,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 212 transitions. [2020-12-23 06:56:59,423 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 212 transitions. Word has length 200 [2020-12-23 06:56:59,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:59,424 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 212 transitions. [2020-12-23 06:56:59,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:56:59,424 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 212 transitions. [2020-12-23 06:56:59,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-12-23 06:56:59,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:59,425 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:59,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 06:56:59,641 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:59,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:59,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1431974901, now seen corresponding path program 47 times [2020-12-23 06:56:59,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:59,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141022730] [2020-12-23 06:56:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 2082 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:02,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141022730] [2020-12-23 06:57:02,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233357438] [2020-12-23 06:57:02,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:57:02,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-12-23 06:57:02,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:02,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 06:57:02,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 2178 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:06,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:06,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 104 [2020-12-23 06:57:06,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44473451] [2020-12-23 06:57:06,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-12-23 06:57:06,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:06,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-12-23 06:57:06,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=8295, Unknown=0, NotChecked=0, Total=10712 [2020-12-23 06:57:06,320 INFO L87 Difference]: Start difference. First operand 209 states and 212 transitions. Second operand 104 states. [2020-12-23 06:57:09,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:09,110 INFO L93 Difference]: Finished difference Result 480 states and 550 transitions. [2020-12-23 06:57:09,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 06:57:09,111 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 208 [2020-12-23 06:57:09,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:09,112 INFO L225 Difference]: With dead ends: 480 [2020-12-23 06:57:09,113 INFO L226 Difference]: Without dead ends: 343 [2020-12-23 06:57:09,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4051 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4630, Invalid=14002, Unknown=0, NotChecked=0, Total=18632 [2020-12-23 06:57:09,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-12-23 06:57:09,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 211. [2020-12-23 06:57:09,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-12-23 06:57:09,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 214 transitions. [2020-12-23 06:57:09,134 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 214 transitions. Word has length 208 [2020-12-23 06:57:09,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:09,134 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 214 transitions. [2020-12-23 06:57:09,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-12-23 06:57:09,134 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 214 transitions. [2020-12-23 06:57:09,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-23 06:57:09,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:09,135 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:09,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:09,346 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:09,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:09,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1844102480, now seen corresponding path program 48 times [2020-12-23 06:57:09,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:09,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758545984] [2020-12-23 06:57:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 2082 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:12,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758545984] [2020-12-23 06:57:12,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62304049] [2020-12-23 06:57:12,187 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 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 06:57:12,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2020-12-23 06:57:12,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:12,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 06:57:12,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 2178 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:16,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:16,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 105 [2020-12-23 06:57:16,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341649965] [2020-12-23 06:57:16,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 105 states [2020-12-23 06:57:16,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:16,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2020-12-23 06:57:16,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=8467, Unknown=0, NotChecked=0, Total=10920 [2020-12-23 06:57:16,222 INFO L87 Difference]: Start difference. First operand 211 states and 214 transitions. Second operand 105 states. [2020-12-23 06:57:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:19,151 INFO L93 Difference]: Finished difference Result 488 states and 560 transitions. [2020-12-23 06:57:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 06:57:19,152 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 210 [2020-12-23 06:57:19,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:19,154 INFO L225 Difference]: With dead ends: 488 [2020-12-23 06:57:19,154 INFO L226 Difference]: Without dead ends: 349 [2020-12-23 06:57:19,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4123 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=4801, Invalid=14381, Unknown=0, NotChecked=0, Total=19182 [2020-12-23 06:57:19,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-12-23 06:57:19,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 213. [2020-12-23 06:57:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-23 06:57:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 216 transitions. [2020-12-23 06:57:19,172 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 216 transitions. Word has length 210 [2020-12-23 06:57:19,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:19,172 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 216 transitions. [2020-12-23 06:57:19,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2020-12-23 06:57:19,172 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 216 transitions. [2020-12-23 06:57:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-23 06:57:19,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:19,174 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:19,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:19,390 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:19,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:19,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1533252629, now seen corresponding path program 49 times [2020-12-23 06:57:19,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:19,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267536449] [2020-12-23 06:57:19,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3368 backedges. 1122 proven. 2246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:20,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267536449] [2020-12-23 06:57:20,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983315345] [2020-12-23 06:57:20,511 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 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 06:57:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:20,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 06:57:20,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3368 backedges. 1190 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:21,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:21,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2020-12-23 06:57:21,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426651388] [2020-12-23 06:57:21,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:57:21,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:57:21,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:57:21,052 INFO L87 Difference]: Start difference. First operand 213 states and 216 transitions. Second operand 40 states. [2020-12-23 06:57:22,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:22,225 INFO L93 Difference]: Finished difference Result 226 states and 230 transitions. [2020-12-23 06:57:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 06:57:22,226 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 212 [2020-12-23 06:57:22,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:22,227 INFO L225 Difference]: With dead ends: 226 [2020-12-23 06:57:22,227 INFO L226 Difference]: Without dead ends: 224 [2020-12-23 06:57:22,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2039, Invalid=3511, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 06:57:22,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-23 06:57:22,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2020-12-23 06:57:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-23 06:57:22,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 224 transitions. [2020-12-23 06:57:22,242 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 224 transitions. Word has length 212 [2020-12-23 06:57:22,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:22,243 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 224 transitions. [2020-12-23 06:57:22,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:57:22,243 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 224 transitions. [2020-12-23 06:57:22,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-23 06:57:22,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:22,244 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:22,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:22,452 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:22,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:22,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1409744645, now seen corresponding path program 50 times [2020-12-23 06:57:22,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:22,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624317639] [2020-12-23 06:57:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 2348 proven. 1292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:25,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624317639] [2020-12-23 06:57:25,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392093071] [2020-12-23 06:57:25,548 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 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 06:57:25,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:57:25,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:25,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 06:57:25,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 2448 proven. 1190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:57:29,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:29,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72] total 109 [2020-12-23 06:57:29,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247281812] [2020-12-23 06:57:29,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 109 states [2020-12-23 06:57:29,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:29,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2020-12-23 06:57:29,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2631, Invalid=9141, Unknown=0, NotChecked=0, Total=11772 [2020-12-23 06:57:29,852 INFO L87 Difference]: Start difference. First operand 221 states and 224 transitions. Second operand 109 states. [2020-12-23 06:57:32,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:32,971 INFO L93 Difference]: Finished difference Result 508 states and 582 transitions. [2020-12-23 06:57:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 06:57:32,971 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 220 [2020-12-23 06:57:32,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:32,973 INFO L225 Difference]: With dead ends: 508 [2020-12-23 06:57:32,973 INFO L226 Difference]: Without dead ends: 363 [2020-12-23 06:57:32,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4470 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=5118, Invalid=15474, Unknown=0, NotChecked=0, Total=20592 [2020-12-23 06:57:32,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-12-23 06:57:32,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 223. [2020-12-23 06:57:32,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-23 06:57:32,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 226 transitions. [2020-12-23 06:57:32,992 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 226 transitions. Word has length 220 [2020-12-23 06:57:32,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:32,993 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 226 transitions. [2020-12-23 06:57:32,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 109 states. [2020-12-23 06:57:32,993 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 226 transitions. [2020-12-23 06:57:32,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-12-23 06:57:32,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:32,994 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:33,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:33,194 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:33,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:33,195 INFO L82 PathProgramCache]: Analyzing trace with hash -333012960, now seen corresponding path program 51 times [2020-12-23 06:57:33,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:33,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234113309] [2020-12-23 06:57:33,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 2348 proven. 1362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:36,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234113309] [2020-12-23 06:57:36,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004306402] [2020-12-23 06:57:36,445 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 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 06:57:36,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2020-12-23 06:57:36,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:36,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 06:57:36,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 2450 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:41,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:41,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 111 [2020-12-23 06:57:41,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940142862] [2020-12-23 06:57:41,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 111 states [2020-12-23 06:57:41,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:41,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2020-12-23 06:57:41,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2741, Invalid=9469, Unknown=0, NotChecked=0, Total=12210 [2020-12-23 06:57:41,041 INFO L87 Difference]: Start difference. First operand 223 states and 226 transitions. Second operand 111 states. [2020-12-23 06:57:44,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:44,363 INFO L93 Difference]: Finished difference Result 516 states and 592 transitions. [2020-12-23 06:57:44,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 06:57:44,363 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 222 [2020-12-23 06:57:44,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:44,364 INFO L225 Difference]: With dead ends: 516 [2020-12-23 06:57:44,365 INFO L226 Difference]: Without dead ends: 369 [2020-12-23 06:57:44,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4618 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=5371, Invalid=16091, Unknown=0, NotChecked=0, Total=21462 [2020-12-23 06:57:44,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-12-23 06:57:44,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 225. [2020-12-23 06:57:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-12-23 06:57:44,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 228 transitions. [2020-12-23 06:57:44,393 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 228 transitions. Word has length 222 [2020-12-23 06:57:44,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:44,394 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 228 transitions. [2020-12-23 06:57:44,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 111 states. [2020-12-23 06:57:44,394 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 228 transitions. [2020-12-23 06:57:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-23 06:57:44,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:44,395 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:44,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 06:57:44,610 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:44,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:44,610 INFO L82 PathProgramCache]: Analyzing trace with hash -680982011, now seen corresponding path program 52 times [2020-12-23 06:57:44,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:44,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2929075] [2020-12-23 06:57:44,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 1260 proven. 2522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:45,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2929075] [2020-12-23 06:57:45,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233235297] [2020-12-23 06:57:45,868 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 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 06:57:46,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:57:46,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:46,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-23 06:57:46,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 1332 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:46,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:46,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 42 [2020-12-23 06:57:46,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678526709] [2020-12-23 06:57:46,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 06:57:46,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:46,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 06:57:46,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:57:46,393 INFO L87 Difference]: Start difference. First operand 225 states and 228 transitions. Second operand 42 states. [2020-12-23 06:57:47,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:47,776 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2020-12-23 06:57:47,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-23 06:57:47,777 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 224 [2020-12-23 06:57:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:47,778 INFO L225 Difference]: With dead ends: 238 [2020-12-23 06:57:47,778 INFO L226 Difference]: Without dead ends: 236 [2020-12-23 06:57:47,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2266, Invalid=3896, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 06:57:47,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-12-23 06:57:47,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 233. [2020-12-23 06:57:47,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-12-23 06:57:47,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 236 transitions. [2020-12-23 06:57:47,802 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 236 transitions. Word has length 224 [2020-12-23 06:57:47,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:47,802 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 236 transitions. [2020-12-23 06:57:47,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 06:57:47,802 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 236 transitions. [2020-12-23 06:57:47,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-12-23 06:57:47,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:47,804 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:48,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:48,017 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:48,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:48,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1713273109, now seen corresponding path program 53 times [2020-12-23 06:57:48,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:48,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475671700] [2020-12-23 06:57:48,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 2630 proven. 1440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:51,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475671700] [2020-12-23 06:57:51,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579312238] [2020-12-23 06:57:51,597 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 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 06:57:51,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2020-12-23 06:57:51,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:51,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 06:57:51,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 2738 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:56,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:56,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 116 [2020-12-23 06:57:56,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823504327] [2020-12-23 06:57:56,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-12-23 06:57:56,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:56,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-12-23 06:57:56,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=10335, Unknown=0, NotChecked=0, Total=13340 [2020-12-23 06:57:56,725 INFO L87 Difference]: Start difference. First operand 233 states and 236 transitions. Second operand 116 states. [2020-12-23 06:58:00,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:00,327 INFO L93 Difference]: Finished difference Result 536 states and 614 transitions. [2020-12-23 06:58:00,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-23 06:58:00,328 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 232 [2020-12-23 06:58:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:00,330 INFO L225 Difference]: With dead ends: 536 [2020-12-23 06:58:00,330 INFO L226 Difference]: Without dead ends: 383 [2020-12-23 06:58:00,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5061 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=5782, Invalid=17474, Unknown=0, NotChecked=0, Total=23256 [2020-12-23 06:58:00,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-12-23 06:58:00,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 235. [2020-12-23 06:58:00,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-12-23 06:58:00,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 238 transitions. [2020-12-23 06:58:00,356 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 238 transitions. Word has length 232 [2020-12-23 06:58:00,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:00,356 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 238 transitions. [2020-12-23 06:58:00,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-12-23 06:58:00,356 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 238 transitions. [2020-12-23 06:58:00,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-12-23 06:58:00,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:00,358 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:00,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 06:58:00,573 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:00,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:00,573 INFO L82 PathProgramCache]: Analyzing trace with hash -662137200, now seen corresponding path program 54 times [2020-12-23 06:58:00,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:00,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578408473] [2020-12-23 06:58:00,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 2630 proven. 1514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:04,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578408473] [2020-12-23 06:58:04,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524085407] [2020-12-23 06:58:04,316 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 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 06:58:04,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2020-12-23 06:58:04,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:04,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-23 06:58:04,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 2738 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:09,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:09,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 117 [2020-12-23 06:58:09,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254677173] [2020-12-23 06:58:09,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 117 states [2020-12-23 06:58:09,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:09,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2020-12-23 06:58:09,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3045, Invalid=10527, Unknown=0, NotChecked=0, Total=13572 [2020-12-23 06:58:09,609 INFO L87 Difference]: Start difference. First operand 235 states and 238 transitions. Second operand 117 states. [2020-12-23 06:58:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:13,471 INFO L93 Difference]: Finished difference Result 544 states and 624 transitions. [2020-12-23 06:58:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-23 06:58:13,471 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 234 [2020-12-23 06:58:13,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:13,472 INFO L225 Difference]: With dead ends: 544 [2020-12-23 06:58:13,472 INFO L226 Difference]: Without dead ends: 389 [2020-12-23 06:58:13,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5141 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=5973, Invalid=17897, Unknown=0, NotChecked=0, Total=23870 [2020-12-23 06:58:13,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-12-23 06:58:13,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 237. [2020-12-23 06:58:13,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-12-23 06:58:13,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 240 transitions. [2020-12-23 06:58:13,497 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 240 transitions. Word has length 234 [2020-12-23 06:58:13,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:13,497 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 240 transitions. [2020-12-23 06:58:13,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 117 states. [2020-12-23 06:58:13,497 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 240 transitions. [2020-12-23 06:58:13,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-23 06:58:13,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:13,498 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:13,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 06:58:13,699 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:13,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:13,700 INFO L82 PathProgramCache]: Analyzing trace with hash 162156789, now seen corresponding path program 55 times [2020-12-23 06:58:13,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:13,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179156190] [2020-12-23 06:58:13,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4220 backedges. 1406 proven. 2814 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:15,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179156190] [2020-12-23 06:58:15,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191339205] [2020-12-23 06:58:15,140 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 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 06:58:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:15,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 06:58:15,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4220 backedges. 1482 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:15,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:15,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 44 [2020-12-23 06:58:15,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675632366] [2020-12-23 06:58:15,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 06:58:15,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:15,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 06:58:15,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:58:15,705 INFO L87 Difference]: Start difference. First operand 237 states and 240 transitions. Second operand 44 states. [2020-12-23 06:58:17,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:17,267 INFO L93 Difference]: Finished difference Result 250 states and 254 transitions. [2020-12-23 06:58:17,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-23 06:58:17,268 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 236 [2020-12-23 06:58:17,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:17,269 INFO L225 Difference]: With dead ends: 250 [2020-12-23 06:58:17,269 INFO L226 Difference]: Without dead ends: 248 [2020-12-23 06:58:17,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2505, Invalid=4301, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 06:58:17,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-23 06:58:17,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 245. [2020-12-23 06:58:17,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-12-23 06:58:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 248 transitions. [2020-12-23 06:58:17,286 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 248 transitions. Word has length 236 [2020-12-23 06:58:17,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:17,286 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 248 transitions. [2020-12-23 06:58:17,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 06:58:17,286 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 248 transitions. [2020-12-23 06:58:17,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-12-23 06:58:17,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:17,288 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:17,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:17,503 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:17,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:17,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1314595365, now seen corresponding path program 56 times [2020-12-23 06:58:17,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:17,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972416426] [2020-12-23 06:58:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 2928 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:21,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972416426] [2020-12-23 06:58:21,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341552070] [2020-12-23 06:58:21,631 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 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 06:58:21,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:58:21,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:21,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-23 06:58:21,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 3040 proven. 1482 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:58:27,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:27,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80] total 121 [2020-12-23 06:58:27,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258387477] [2020-12-23 06:58:27,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 121 states [2020-12-23 06:58:27,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:27,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2020-12-23 06:58:27,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3243, Invalid=11277, Unknown=0, NotChecked=0, Total=14520 [2020-12-23 06:58:27,318 INFO L87 Difference]: Start difference. First operand 245 states and 248 transitions. Second operand 121 states. [2020-12-23 06:58:31,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:31,482 INFO L93 Difference]: Finished difference Result 564 states and 646 transitions. [2020-12-23 06:58:31,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-23 06:58:31,482 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 244 [2020-12-23 06:58:31,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:31,484 INFO L225 Difference]: With dead ends: 564 [2020-12-23 06:58:31,484 INFO L226 Difference]: Without dead ends: 403 [2020-12-23 06:58:31,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5528 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=6326, Invalid=19114, Unknown=0, NotChecked=0, Total=25440 [2020-12-23 06:58:31,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-12-23 06:58:31,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 247. [2020-12-23 06:58:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-23 06:58:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 250 transitions. [2020-12-23 06:58:31,512 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 250 transitions. Word has length 244 [2020-12-23 06:58:31,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:31,512 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 250 transitions. [2020-12-23 06:58:31,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 121 states. [2020-12-23 06:58:31,513 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 250 transitions. [2020-12-23 06:58:31,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-12-23 06:58:31,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:31,514 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:31,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 06:58:31,725 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:31,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:31,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1784635904, now seen corresponding path program 57 times [2020-12-23 06:58:31,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:31,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964109272] [2020-12-23 06:58:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4602 backedges. 2928 proven. 1674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:36,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964109272] [2020-12-23 06:58:36,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148297011] [2020-12-23 06:58:36,062 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 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 06:58:36,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-23 06:58:36,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:36,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-23 06:58:36,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4602 backedges. 3042 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:42,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:42,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 123 [2020-12-23 06:58:42,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592648689] [2020-12-23 06:58:42,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 123 states [2020-12-23 06:58:42,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:42,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2020-12-23 06:58:42,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=11641, Unknown=0, NotChecked=0, Total=15006 [2020-12-23 06:58:42,247 INFO L87 Difference]: Start difference. First operand 247 states and 250 transitions. Second operand 123 states.