/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/loops-crafted-1/theatreSquare.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:13:05,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:13:05,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:13:05,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:13:05,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:13:05,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:13:05,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:13:05,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:13:05,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:13:05,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:13:05,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:13:05,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:13:05,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:13:05,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:13:05,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:13:05,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:13:05,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:13:05,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:13:05,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:13:05,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:13:05,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:13:05,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:13:05,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:13:05,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:13:05,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:13:05,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:13:05,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:13:05,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:13:05,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:13:05,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:13:05,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:13:05,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:13:05,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:13:05,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:13:05,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:13:05,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:13:05,537 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 07:13:05,583 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:13:05,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:13:05,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:13:05,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:13:05,587 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:13:05,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:13:05,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:13:05,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:13:05,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:13:05,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:13:05,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:13:05,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:13:05,591 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:13:05,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:13:05,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:13:05,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:13:05,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:13:05,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:13:05,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:13:05,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:13:05,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:13:05,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:13:05,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:13:05,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:13:05,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:13:05,594 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:13:06,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:13:06,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:13:06,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:13:06,056 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:13:06,057 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:13:06,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2020-12-23 07:13:06,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b1fb32e46/1d5fe9818679406a9b73f611e1900410/FLAG9aef0550f [2020-12-23 07:13:06,761 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:13:06,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2020-12-23 07:13:06,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b1fb32e46/1d5fe9818679406a9b73f611e1900410/FLAG9aef0550f [2020-12-23 07:13:07,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b1fb32e46/1d5fe9818679406a9b73f611e1900410 [2020-12-23 07:13:07,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:13:07,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:13:07,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:13:07,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:13:07,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:13:07,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:13:07" (1/1) ... [2020-12-23 07:13:07,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a2c6c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:07, skipping insertion in model container [2020-12-23 07:13:07,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:13:07" (1/1) ... [2020-12-23 07:13:07,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:13:07,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:13:07,390 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/loops-crafted-1/theatreSquare.c[370,383] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~b~1,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~l~1,] left hand side expression in assignment: lhs: VariableLHS[~j~1,] left hand side expression in assignment: lhs: VariableLHS[~y~1,] left hand side expression in assignment: lhs: VariableLHS[~x~1,] left hand side expression in assignment: lhs: VariableLHS[~n_stones1~0,] left hand side expression in assignment: lhs: VariableLHS[~n_stones1~0,] left hand side expression in assignment: lhs: VariableLHS[~n_stones2~0,] [2020-12-23 07:13:07,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:13:07,427 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:13:07,441 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/loops-crafted-1/theatreSquare.c[370,383] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~b~1,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~l~1,] left hand side expression in assignment: lhs: VariableLHS[~j~1,] left hand side expression in assignment: lhs: VariableLHS[~y~1,] left hand side expression in assignment: lhs: VariableLHS[~x~1,] left hand side expression in assignment: lhs: VariableLHS[~n_stones1~0,] left hand side expression in assignment: lhs: VariableLHS[~n_stones1~0,] left hand side expression in assignment: lhs: VariableLHS[~n_stones2~0,] [2020-12-23 07:13:07,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:13:07,477 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:13:07,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:07 WrapperNode [2020-12-23 07:13:07,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:13:07,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:13:07,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:13:07,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:13:07,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:07" (1/1) ... [2020-12-23 07:13:07,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:07" (1/1) ... [2020-12-23 07:13:07,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:13:07,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:13:07,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:13:07,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:13:07,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:07" (1/1) ... [2020-12-23 07:13:07,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:07" (1/1) ... [2020-12-23 07:13:07,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:07" (1/1) ... [2020-12-23 07:13:07,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:07" (1/1) ... [2020-12-23 07:13:07,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:07" (1/1) ... [2020-12-23 07:13:07,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:07" (1/1) ... [2020-12-23 07:13:07,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:07" (1/1) ... [2020-12-23 07:13:07,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:13:07,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:13:07,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:13:07,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:13:07,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:07" (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 07:13:07,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:13:07,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:13:07,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:13:07,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:13:07,958 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:13:07,963 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-23 07:13:07,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:13:07 BoogieIcfgContainer [2020-12-23 07:13:07,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:13:07,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:13:07,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:13:07,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:13:07,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:13:07" (1/3) ... [2020-12-23 07:13:07,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41682a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:13:07, skipping insertion in model container [2020-12-23 07:13:07,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:13:07" (2/3) ... [2020-12-23 07:13:07,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41682a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:13:07, skipping insertion in model container [2020-12-23 07:13:07,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:13:07" (3/3) ... [2020-12-23 07:13:07,991 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2020-12-23 07:13:08,006 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:13:08,015 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 07:13:08,050 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 07:13:08,090 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:13:08,090 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:13:08,090 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:13:08,090 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:13:08,091 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:13:08,091 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:13:08,091 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:13:08,091 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:13:08,108 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-23 07:13:08,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 07:13:08,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:08,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 07:13:08,129 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:08,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:08,138 INFO L82 PathProgramCache]: Analyzing trace with hash 891969447, now seen corresponding path program 1 times [2020-12-23 07:13:08,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:08,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129310089] [2020-12-23 07:13:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:08,404 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 07:13:08,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129310089] [2020-12-23 07:13:08,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:13:08,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:13:08,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243854294] [2020-12-23 07:13:08,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:13:08,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:08,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:13:08,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:13:08,429 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 4 states. [2020-12-23 07:13:08,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:08,477 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2020-12-23 07:13:08,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:13:08,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 07:13:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:08,488 INFO L225 Difference]: With dead ends: 48 [2020-12-23 07:13:08,488 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 07:13:08,491 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 07:13:08,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 07:13:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 07:13:08,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 07:13:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-12-23 07:13:08,527 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 6 [2020-12-23 07:13:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:08,527 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-12-23 07:13:08,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:13:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-12-23 07:13:08,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:13:08,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:08,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:08,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:13:08,529 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:08,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:08,530 INFO L82 PathProgramCache]: Analyzing trace with hash 535820783, now seen corresponding path program 1 times [2020-12-23 07:13:08,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:08,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823109623] [2020-12-23 07:13:08,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:08,678 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 07:13:08,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823109623] [2020-12-23 07:13:08,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:13:08,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 07:13:08,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428690742] [2020-12-23 07:13:08,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:13:08,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:08,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:13:08,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:13:08,683 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 9 states. [2020-12-23 07:13:08,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:08,840 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-12-23 07:13:08,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:13:08,840 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-12-23 07:13:08,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:08,842 INFO L225 Difference]: With dead ends: 39 [2020-12-23 07:13:08,842 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:13:08,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:13:08,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:13:08,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-12-23 07:13:08,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 07:13:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-12-23 07:13:08,852 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 18 [2020-12-23 07:13:08,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:08,852 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-12-23 07:13:08,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:13:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-12-23 07:13:08,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:13:08,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:08,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:08,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 07:13:08,854 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:08,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:08,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1031838486, now seen corresponding path program 1 times [2020-12-23 07:13:08,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:08,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132956300] [2020-12-23 07:13:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:08,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132956300] [2020-12-23 07:13:08,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:13:08,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:13:08,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536226547] [2020-12-23 07:13:08,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:13:08,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:08,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:13:08,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:13:08,930 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 4 states. [2020-12-23 07:13:08,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:08,946 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-12-23 07:13:08,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:13:08,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-23 07:13:08,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:08,948 INFO L225 Difference]: With dead ends: 47 [2020-12-23 07:13:08,948 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 07:13:08,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:13:08,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 07:13:08,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-12-23 07:13:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 07:13:08,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2020-12-23 07:13:08,957 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 19 [2020-12-23 07:13:08,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:08,957 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2020-12-23 07:13:08,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:13:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2020-12-23 07:13:08,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:13:08,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:08,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:08,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 07:13:08,959 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:08,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:08,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1782670069, now seen corresponding path program 1 times [2020-12-23 07:13:08,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:08,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305544044] [2020-12-23 07:13:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:09,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305544044] [2020-12-23 07:13:09,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:13:09,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:13:09,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838247983] [2020-12-23 07:13:09,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:13:09,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:09,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:13:09,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:13:09,017 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand 4 states. [2020-12-23 07:13:09,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:09,036 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2020-12-23 07:13:09,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:13:09,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-23 07:13:09,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:09,039 INFO L225 Difference]: With dead ends: 66 [2020-12-23 07:13:09,039 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 07:13:09,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:13:09,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 07:13:09,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2020-12-23 07:13:09,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 07:13:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2020-12-23 07:13:09,053 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 19 [2020-12-23 07:13:09,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:09,053 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2020-12-23 07:13:09,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:13:09,053 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2020-12-23 07:13:09,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:13:09,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:09,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:09,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 07:13:09,059 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:09,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:09,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1545632287, now seen corresponding path program 1 times [2020-12-23 07:13:09,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:09,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400141342] [2020-12-23 07:13:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:13:09,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400141342] [2020-12-23 07:13:09,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:13:09,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:13:09,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098215697] [2020-12-23 07:13:09,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:13:09,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:09,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:13:09,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:13:09,174 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand 3 states. [2020-12-23 07:13:09,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:09,190 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-12-23 07:13:09,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:13:09,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-23 07:13:09,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:09,192 INFO L225 Difference]: With dead ends: 49 [2020-12-23 07:13:09,192 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 07:13:09,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:13:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 07:13:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 07:13:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 07:13:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-12-23 07:13:09,201 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 20 [2020-12-23 07:13:09,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:09,201 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-12-23 07:13:09,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:13:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-12-23 07:13:09,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:13:09,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:09,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:09,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 07:13:09,203 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:09,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1312537087, now seen corresponding path program 1 times [2020-12-23 07:13:09,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:09,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519619451] [2020-12-23 07:13:09,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:13:09,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519619451] [2020-12-23 07:13:09,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:13:09,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:13:09,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211956786] [2020-12-23 07:13:09,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:13:09,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:09,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:13:09,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:13:09,286 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 3 states. [2020-12-23 07:13:09,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:09,316 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2020-12-23 07:13:09,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:13:09,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-23 07:13:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:09,318 INFO L225 Difference]: With dead ends: 59 [2020-12-23 07:13:09,318 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:13:09,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:13:09,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:13:09,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 07:13:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 07:13:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2020-12-23 07:13:09,326 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 20 [2020-12-23 07:13:09,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:09,327 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2020-12-23 07:13:09,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:13:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2020-12-23 07:13:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:13:09,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:09,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:09,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 07:13:09,329 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:09,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:09,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1130312570, now seen corresponding path program 1 times [2020-12-23 07:13:09,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:09,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042819516] [2020-12-23 07:13:09,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:13:09,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042819516] [2020-12-23 07:13:09,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:13:09,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:13:09,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75300489] [2020-12-23 07:13:09,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:13:09,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:09,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:13:09,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:13:09,411 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 4 states. [2020-12-23 07:13:09,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:09,437 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2020-12-23 07:13:09,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:13:09,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-23 07:13:09,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:09,441 INFO L225 Difference]: With dead ends: 39 [2020-12-23 07:13:09,441 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 07:13:09,442 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 07:13:09,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 07:13:09,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 07:13:09,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 07:13:09,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-12-23 07:13:09,454 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 21 [2020-12-23 07:13:09,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:09,455 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-12-23 07:13:09,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:13:09,455 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-12-23 07:13:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:13:09,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:09,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:09,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 07:13:09,460 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:09,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:09,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1437483694, now seen corresponding path program 1 times [2020-12-23 07:13:09,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:09,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694837863] [2020-12-23 07:13:09,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:13:09,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694837863] [2020-12-23 07:13:09,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933877770] [2020-12-23 07:13:09,541 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 07:13:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:09,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:13:09,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:13:09,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:13:09,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2020-12-23 07:13:09,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139187785] [2020-12-23 07:13:09,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:13:09,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:09,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:13:09,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:13:09,709 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 5 states. [2020-12-23 07:13:09,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:09,741 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-12-23 07:13:09,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:13:09,742 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-12-23 07:13:09,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:09,743 INFO L225 Difference]: With dead ends: 37 [2020-12-23 07:13:09,743 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:13:09,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:13:09,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:13:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 07:13:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:13:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-23 07:13:09,755 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 22 [2020-12-23 07:13:09,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:09,756 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-23 07:13:09,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:13:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-23 07:13:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:13:09,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:09,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:09,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 07:13:09,960 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:09,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:09,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1965889039, now seen corresponding path program 1 times [2020-12-23 07:13:09,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:09,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151801321] [2020-12-23 07:13:09,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:13:10,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151801321] [2020-12-23 07:13:10,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94904217] [2020-12-23 07:13:10,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:10,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:13:10,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:10,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:13:10,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-12-23 07:13:10,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267768952] [2020-12-23 07:13:10,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:13:10,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:10,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:13:10,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:13:10,153 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 4 states. [2020-12-23 07:13:10,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:10,176 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-12-23 07:13:10,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:13:10,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-12-23 07:13:10,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:10,178 INFO L225 Difference]: With dead ends: 32 [2020-12-23 07:13:10,178 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 07:13:10,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:13:10,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 07:13:10,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 07:13:10,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 07:13:10,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-23 07:13:10,191 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 22 [2020-12-23 07:13:10,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:10,192 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-23 07:13:10,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:13:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-23 07:13:10,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:13:10,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:10,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:10,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:10,412 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:10,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:10,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1829813877, now seen corresponding path program 1 times [2020-12-23 07:13:10,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:10,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552731360] [2020-12-23 07:13:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:10,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552731360] [2020-12-23 07:13:10,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123538958] [2020-12-23 07:13:10,463 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 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 07:13:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:10,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:13:10,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:10,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:13:10,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2020-12-23 07:13:10,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200521] [2020-12-23 07:13:10,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:13:10,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:10,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:13:10,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:13:10,585 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 5 states. [2020-12-23 07:13:10,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:10,600 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-12-23 07:13:10,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:13:10,600 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-23 07:13:10,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:10,601 INFO L225 Difference]: With dead ends: 31 [2020-12-23 07:13:10,601 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 07:13:10,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:13:10,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 07:13:10,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 07:13:10,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 07:13:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-12-23 07:13:10,606 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 23 [2020-12-23 07:13:10,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:10,606 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-12-23 07:13:10,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:13:10,606 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-12-23 07:13:10,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 07:13:10,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:10,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:10,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 07:13:10,823 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:10,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:10,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1804048560, now seen corresponding path program 1 times [2020-12-23 07:13:10,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:10,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158998749] [2020-12-23 07:13:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:13:11,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158998749] [2020-12-23 07:13:11,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825264883] [2020-12-23 07:13:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:11,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:13:11,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:11,316 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:13:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:13:11,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:11,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2020-12-23 07:13:11,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858389510] [2020-12-23 07:13:11,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 07:13:11,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:11,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 07:13:11,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:13:11,348 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 20 states. [2020-12-23 07:13:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:11,856 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-12-23 07:13:11,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:13:11,856 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-12-23 07:13:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:11,857 INFO L225 Difference]: With dead ends: 77 [2020-12-23 07:13:11,857 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 07:13:11,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:13:11,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 07:13:11,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 37. [2020-12-23 07:13:11,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 07:13:11,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2020-12-23 07:13:11,866 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 24 [2020-12-23 07:13:11,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:11,866 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2020-12-23 07:13:11,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 07:13:11,866 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2020-12-23 07:13:11,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:13:11,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:11,867 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:12,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:12,082 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:12,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:12,084 INFO L82 PathProgramCache]: Analyzing trace with hash 571706934, now seen corresponding path program 2 times [2020-12-23 07:13:12,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:12,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129618192] [2020-12-23 07:13:12,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:12,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129618192] [2020-12-23 07:13:12,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119024280] [2020-12-23 07:13:12,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:12,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:13:12,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:12,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:13:12,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:12,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:12,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 07:13:12,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484133793] [2020-12-23 07:13:12,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:13:12,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:12,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:13:12,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:13:12,320 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 10 states. [2020-12-23 07:13:12,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:12,419 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-12-23 07:13:12,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:13:12,419 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-12-23 07:13:12,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:12,420 INFO L225 Difference]: With dead ends: 63 [2020-12-23 07:13:12,420 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 07:13:12,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:13:12,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 07:13:12,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2020-12-23 07:13:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 07:13:12,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2020-12-23 07:13:12,429 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 25 [2020-12-23 07:13:12,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:12,429 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2020-12-23 07:13:12,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:13:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2020-12-23 07:13:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:13:12,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:12,430 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:12,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 07:13:12,644 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:12,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1510332885, now seen corresponding path program 3 times [2020-12-23 07:13:12,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:12,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133622525] [2020-12-23 07:13:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:12,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133622525] [2020-12-23 07:13:12,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534342644] [2020-12-23 07:13:12,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:12,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:13:12,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:12,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:13:12,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:12,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:12,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-23 07:13:12,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080898757] [2020-12-23 07:13:12,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:13:12,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:12,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:13:12,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:13:12,823 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 9 states. [2020-12-23 07:13:12,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:12,867 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-12-23 07:13:12,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:13:12,868 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-12-23 07:13:12,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:12,871 INFO L225 Difference]: With dead ends: 72 [2020-12-23 07:13:12,871 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 07:13:12,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:13:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 07:13:12,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-12-23 07:13:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 07:13:12,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2020-12-23 07:13:12,890 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 25 [2020-12-23 07:13:12,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:12,890 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2020-12-23 07:13:12,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:13:12,890 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2020-12-23 07:13:12,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:13:12,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:12,892 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:13,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:13,093 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:13,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:13,094 INFO L82 PathProgramCache]: Analyzing trace with hash 595735960, now seen corresponding path program 4 times [2020-12-23 07:13:13,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:13,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311791904] [2020-12-23 07:13:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:13,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311791904] [2020-12-23 07:13:13,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744101208] [2020-12-23 07:13:13,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:13,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:13:13,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:13,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:13:13,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:13,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:13,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-23 07:13:13,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842669961] [2020-12-23 07:13:13,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:13:13,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:13,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:13:13,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:13:13,294 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand 9 states. [2020-12-23 07:13:13,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:13,330 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2020-12-23 07:13:13,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:13:13,330 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-12-23 07:13:13,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:13,331 INFO L225 Difference]: With dead ends: 126 [2020-12-23 07:13:13,331 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 07:13:13,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:13:13,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 07:13:13,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2020-12-23 07:13:13,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 07:13:13,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-12-23 07:13:13,344 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 25 [2020-12-23 07:13:13,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:13,344 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-12-23 07:13:13,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:13:13,344 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-12-23 07:13:13,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:13:13,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:13,345 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:13,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 07:13:13,560 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:13,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:13,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1299373655, now seen corresponding path program 5 times [2020-12-23 07:13:13,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:13,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75658272] [2020-12-23 07:13:13,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:13,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75658272] [2020-12-23 07:13:13,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62370451] [2020-12-23 07:13:13,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:13,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:13:13,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:13,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:13:13,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:13,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:13,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-12-23 07:13:13,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193154388] [2020-12-23 07:13:13,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:13:13,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:13,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:13:13,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:13:13,829 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 11 states. [2020-12-23 07:13:13,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:13,975 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2020-12-23 07:13:13,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:13:13,976 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-12-23 07:13:13,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:13,976 INFO L225 Difference]: With dead ends: 90 [2020-12-23 07:13:13,977 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 07:13:13,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:13:13,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 07:13:14,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-12-23 07:13:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 07:13:14,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-12-23 07:13:14,011 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 25 [2020-12-23 07:13:14,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:14,011 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-12-23 07:13:14,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:13:14,011 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-12-23 07:13:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:13:14,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:14,014 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:14,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 07:13:14,228 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:14,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:14,229 INFO L82 PathProgramCache]: Analyzing trace with hash -120572194, now seen corresponding path program 6 times [2020-12-23 07:13:14,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:14,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321877595] [2020-12-23 07:13:14,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 07:13:14,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321877595] [2020-12-23 07:13:14,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449449861] [2020-12-23 07:13:14,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:14,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 07:13:14,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:14,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:13:14,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:13:14,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:14,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-12-23 07:13:14,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414769937] [2020-12-23 07:13:14,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:13:14,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:14,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:13:14,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:13:14,467 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 11 states. [2020-12-23 07:13:14,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:14,584 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-12-23 07:13:14,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:13:14,585 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-12-23 07:13:14,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:14,585 INFO L225 Difference]: With dead ends: 104 [2020-12-23 07:13:14,585 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 07:13:14,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:13:14,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 07:13:14,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2020-12-23 07:13:14,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 07:13:14,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2020-12-23 07:13:14,607 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 26 [2020-12-23 07:13:14,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:14,607 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2020-12-23 07:13:14,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:13:14,608 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2020-12-23 07:13:14,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:13:14,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:14,609 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:14,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:13:14,824 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:14,825 INFO L82 PathProgramCache]: Analyzing trace with hash -2006452209, now seen corresponding path program 7 times [2020-12-23 07:13:14,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:14,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24986860] [2020-12-23 07:13:14,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:13:15,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24986860] [2020-12-23 07:13:15,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043988881] [2020-12-23 07:13:15,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:15,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:13:15,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:15,348 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:13:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:13:15,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:15,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2020-12-23 07:13:15,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813144363] [2020-12-23 07:13:15,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 07:13:15,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:15,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 07:13:15,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:13:15,375 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand 23 states. [2020-12-23 07:13:15,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:15,953 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2020-12-23 07:13:15,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:13:15,954 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-23 07:13:15,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:15,955 INFO L225 Difference]: With dead ends: 159 [2020-12-23 07:13:15,955 INFO L226 Difference]: Without dead ends: 150 [2020-12-23 07:13:15,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:13:15,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-23 07:13:15,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 88. [2020-12-23 07:13:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 07:13:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-12-23 07:13:15,970 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 26 [2020-12-23 07:13:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:15,970 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-12-23 07:13:15,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 07:13:15,970 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-12-23 07:13:15,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:13:15,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:15,971 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:16,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 07:13:16,187 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:16,189 INFO L82 PathProgramCache]: Analyzing trace with hash -216163038, now seen corresponding path program 8 times [2020-12-23 07:13:16,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:16,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802609110] [2020-12-23 07:13:16,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 07:13:16,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802609110] [2020-12-23 07:13:16,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484447273] [2020-12-23 07:13:16,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:16,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:13:16,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:16,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:13:16,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:13:16,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:16,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2020-12-23 07:13:16,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474791494] [2020-12-23 07:13:16,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:13:16,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:16,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:13:16,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:13:16,494 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 12 states. [2020-12-23 07:13:16,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:16,618 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2020-12-23 07:13:16,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:13:16,618 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-12-23 07:13:16,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:16,619 INFO L225 Difference]: With dead ends: 107 [2020-12-23 07:13:16,619 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 07:13:16,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:13:16,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 07:13:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2020-12-23 07:13:16,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 07:13:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2020-12-23 07:13:16,636 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 26 [2020-12-23 07:13:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:16,636 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2020-12-23 07:13:16,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:13:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2020-12-23 07:13:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:13:16,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:16,638 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:16,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 07:13:16,848 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:16,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:16,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1407838889, now seen corresponding path program 9 times [2020-12-23 07:13:16,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:16,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989221477] [2020-12-23 07:13:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:16,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989221477] [2020-12-23 07:13:16,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084571369] [2020-12-23 07:13:16,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:17,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:13:17,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:17,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:13:17,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:17,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:17,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-23 07:13:17,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409480500] [2020-12-23 07:13:17,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:13:17,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:17,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:13:17,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:13:17,224 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand 15 states. [2020-12-23 07:13:17,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:17,555 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2020-12-23 07:13:17,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:13:17,556 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-12-23 07:13:17,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:17,556 INFO L225 Difference]: With dead ends: 131 [2020-12-23 07:13:17,556 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 07:13:17,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:13:17,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 07:13:17,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 83. [2020-12-23 07:13:17,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 07:13:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-12-23 07:13:17,572 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 27 [2020-12-23 07:13:17,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:17,572 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-12-23 07:13:17,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:13:17,572 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-12-23 07:13:17,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:13:17,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:17,573 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:17,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:17,787 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:17,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:17,788 INFO L82 PathProgramCache]: Analyzing trace with hash -325007018, now seen corresponding path program 10 times [2020-12-23 07:13:17,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:17,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207595883] [2020-12-23 07:13:17,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:17,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207595883] [2020-12-23 07:13:17,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977457052] [2020-12-23 07:13:17,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 07:13:18,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:13:18,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:18,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:13:18,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:18,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:18,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2020-12-23 07:13:18,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165092333] [2020-12-23 07:13:18,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:13:18,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:18,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:13:18,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:13:18,180 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 16 states. [2020-12-23 07:13:18,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:18,522 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2020-12-23 07:13:18,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:13:18,522 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-12-23 07:13:18,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:18,523 INFO L225 Difference]: With dead ends: 121 [2020-12-23 07:13:18,523 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 07:13:18,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:13:18,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 07:13:18,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-12-23 07:13:18,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 07:13:18,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2020-12-23 07:13:18,542 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 27 [2020-12-23 07:13:18,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:18,542 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2020-12-23 07:13:18,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:13:18,542 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2020-12-23 07:13:18,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:13:18,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:18,543 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:18,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-12-23 07:13:18,758 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:18,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:18,759 INFO L82 PathProgramCache]: Analyzing trace with hash 480362644, now seen corresponding path program 11 times [2020-12-23 07:13:18,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:18,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808745382] [2020-12-23 07:13:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 07:13:18,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808745382] [2020-12-23 07:13:18,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537740007] [2020-12-23 07:13:18,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:18,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:13:18,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:18,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:13:18,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 07:13:18,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:18,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 07:13:18,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900858232] [2020-12-23 07:13:18,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:13:18,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:18,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:13:18,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:13:18,969 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand 10 states. [2020-12-23 07:13:19,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:19,027 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2020-12-23 07:13:19,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:13:19,028 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-12-23 07:13:19,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:19,028 INFO L225 Difference]: With dead ends: 110 [2020-12-23 07:13:19,028 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 07:13:19,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:13:19,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 07:13:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2020-12-23 07:13:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 07:13:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2020-12-23 07:13:19,041 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 27 [2020-12-23 07:13:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:19,041 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2020-12-23 07:13:19,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:13:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2020-12-23 07:13:19,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:13:19,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:19,042 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:19,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:19,255 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:19,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:19,256 INFO L82 PathProgramCache]: Analyzing trace with hash 400247189, now seen corresponding path program 12 times [2020-12-23 07:13:19,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:19,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181206151] [2020-12-23 07:13:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 07:13:19,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181206151] [2020-12-23 07:13:19,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016035670] [2020-12-23 07:13:19,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:19,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 07:13:19,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:19,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:13:19,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 07:13:19,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:19,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 07:13:19,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097591057] [2020-12-23 07:13:19,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:13:19,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:19,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:13:19,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:13:19,440 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand 10 states. [2020-12-23 07:13:19,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:19,491 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-12-23 07:13:19,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:13:19,492 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-12-23 07:13:19,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:19,493 INFO L225 Difference]: With dead ends: 84 [2020-12-23 07:13:19,493 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 07:13:19,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:13:19,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 07:13:19,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-12-23 07:13:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 07:13:19,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-12-23 07:13:19,505 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 27 [2020-12-23 07:13:19,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:19,506 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-12-23 07:13:19,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:13:19,506 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-12-23 07:13:19,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:13:19,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:19,506 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:19,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 07:13:19,721 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:19,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:19,722 INFO L82 PathProgramCache]: Analyzing trace with hash -822645520, now seen corresponding path program 13 times [2020-12-23 07:13:19,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:19,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797714778] [2020-12-23 07:13:19,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:13:20,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797714778] [2020-12-23 07:13:20,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24726099] [2020-12-23 07:13:20,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:20,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 07:13:20,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:20,383 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:13:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:13:20,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:20,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2020-12-23 07:13:20,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358392341] [2020-12-23 07:13:20,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 07:13:20,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:20,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 07:13:20,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:13:20,417 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 26 states. [2020-12-23 07:13:21,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:21,264 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2020-12-23 07:13:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 07:13:21,264 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-12-23 07:13:21,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:21,265 INFO L225 Difference]: With dead ends: 149 [2020-12-23 07:13:21,265 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 07:13:21,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:13:21,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 07:13:21,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 81. [2020-12-23 07:13:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 07:13:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2020-12-23 07:13:21,280 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 28 [2020-12-23 07:13:21,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:21,280 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2020-12-23 07:13:21,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 07:13:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2020-12-23 07:13:21,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:13:21,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:21,281 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:21,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:21,495 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:21,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:21,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1124024368, now seen corresponding path program 14 times [2020-12-23 07:13:21,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:21,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745028961] [2020-12-23 07:13:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:13:21,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745028961] [2020-12-23 07:13:21,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632908057] [2020-12-23 07:13:21,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:21,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:13:21,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:21,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:13:21,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:22,092 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:13:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:13:22,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:22,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2020-12-23 07:13:22,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549246545] [2020-12-23 07:13:22,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:13:22,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:22,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:13:22,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:13:22,125 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 24 states. [2020-12-23 07:13:22,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:22,776 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2020-12-23 07:13:22,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:13:22,777 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-12-23 07:13:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:22,778 INFO L225 Difference]: With dead ends: 118 [2020-12-23 07:13:22,778 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 07:13:22,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:13:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 07:13:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2020-12-23 07:13:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 07:13:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2020-12-23 07:13:22,795 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 28 [2020-12-23 07:13:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:22,795 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2020-12-23 07:13:22,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:13:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2020-12-23 07:13:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:13:22,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:22,796 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:23,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:13:23,010 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:23,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:23,011 INFO L82 PathProgramCache]: Analyzing trace with hash 930430102, now seen corresponding path program 15 times [2020-12-23 07:13:23,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:23,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566100522] [2020-12-23 07:13:23,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:23,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566100522] [2020-12-23 07:13:23,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74540000] [2020-12-23 07:13:23,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:23,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:13:23,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:23,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:13:23,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:23,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:23,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-23 07:13:23,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896980696] [2020-12-23 07:13:23,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:13:23,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:23,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:13:23,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:13:23,535 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand 19 states. [2020-12-23 07:13:24,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:24,371 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2020-12-23 07:13:24,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:13:24,372 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 29 [2020-12-23 07:13:24,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:24,373 INFO L225 Difference]: With dead ends: 155 [2020-12-23 07:13:24,373 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 07:13:24,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:13:24,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 07:13:24,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2020-12-23 07:13:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 07:13:24,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2020-12-23 07:13:24,392 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 29 [2020-12-23 07:13:24,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:24,392 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2020-12-23 07:13:24,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:13:24,392 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2020-12-23 07:13:24,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:13:24,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:24,393 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:24,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 07:13:24,608 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:24,609 INFO L82 PathProgramCache]: Analyzing trace with hash 138479735, now seen corresponding path program 16 times [2020-12-23 07:13:24,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:24,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138754400] [2020-12-23 07:13:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:24,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138754400] [2020-12-23 07:13:24,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996550922] [2020-12-23 07:13:24,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:24,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:13:24,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:24,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:13:24,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:25,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:25,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2020-12-23 07:13:25,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378393578] [2020-12-23 07:13:25,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 07:13:25,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:25,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 07:13:25,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:13:25,116 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand 20 states. [2020-12-23 07:13:25,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:25,559 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2020-12-23 07:13:25,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:13:25,560 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-12-23 07:13:25,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:25,561 INFO L225 Difference]: With dead ends: 144 [2020-12-23 07:13:25,561 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 07:13:25,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:13:25,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 07:13:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2020-12-23 07:13:25,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 07:13:25,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2020-12-23 07:13:25,580 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 29 [2020-12-23 07:13:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:25,580 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2020-12-23 07:13:25,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 07:13:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2020-12-23 07:13:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:13:25,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:25,581 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:25,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 07:13:25,795 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:25,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:25,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2086280437, now seen corresponding path program 17 times [2020-12-23 07:13:25,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:25,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353011029] [2020-12-23 07:13:25,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 07:13:25,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353011029] [2020-12-23 07:13:25,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071916988] [2020-12-23 07:13:25,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:25,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 07:13:25,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:25,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:13:25,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 07:13:26,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:26,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-12-23 07:13:26,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795459224] [2020-12-23 07:13:26,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:13:26,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:26,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:13:26,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:13:26,024 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand 12 states. [2020-12-23 07:13:26,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:26,108 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2020-12-23 07:13:26,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:13:26,109 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-12-23 07:13:26,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:26,110 INFO L225 Difference]: With dead ends: 139 [2020-12-23 07:13:26,110 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 07:13:26,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:13:26,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 07:13:26,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2020-12-23 07:13:26,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 07:13:26,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2020-12-23 07:13:26,132 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 29 [2020-12-23 07:13:26,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:26,133 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2020-12-23 07:13:26,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:13:26,133 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2020-12-23 07:13:26,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:13:26,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:26,133 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:26,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 07:13:26,349 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:26,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:26,350 INFO L82 PathProgramCache]: Analyzing trace with hash -397298668, now seen corresponding path program 18 times [2020-12-23 07:13:26,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:26,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80943717] [2020-12-23 07:13:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 07:13:26,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80943717] [2020-12-23 07:13:26,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848821495] [2020-12-23 07:13:26,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:26,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 07:13:26,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:26,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:13:26,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 07:13:26,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:26,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-12-23 07:13:26,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948056536] [2020-12-23 07:13:26,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:13:26,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:26,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:13:26,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:13:26,557 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand 12 states. [2020-12-23 07:13:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:26,660 INFO L93 Difference]: Finished difference Result 262 states and 317 transitions. [2020-12-23 07:13:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:13:26,661 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-12-23 07:13:26,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:26,662 INFO L225 Difference]: With dead ends: 262 [2020-12-23 07:13:26,662 INFO L226 Difference]: Without dead ends: 202 [2020-12-23 07:13:26,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:13:26,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-23 07:13:26,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 134. [2020-12-23 07:13:26,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-23 07:13:26,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 163 transitions. [2020-12-23 07:13:26,688 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 163 transitions. Word has length 29 [2020-12-23 07:13:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:26,688 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 163 transitions. [2020-12-23 07:13:26,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:13:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 163 transitions. [2020-12-23 07:13:26,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:13:26,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:26,689 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:26,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 07:13:26,903 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:26,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:26,904 INFO L82 PathProgramCache]: Analyzing trace with hash 660541935, now seen corresponding path program 19 times [2020-12-23 07:13:26,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:26,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168661851] [2020-12-23 07:13:26,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:13:27,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168661851] [2020-12-23 07:13:27,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868769016] [2020-12-23 07:13:27,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:27,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 07:13:27,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:27,675 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:13:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:13:27,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:27,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2020-12-23 07:13:27,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292113006] [2020-12-23 07:13:27,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 07:13:27,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:27,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 07:13:27,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:13:27,713 INFO L87 Difference]: Start difference. First operand 134 states and 163 transitions. Second operand 29 states. [2020-12-23 07:13:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:28,749 INFO L93 Difference]: Finished difference Result 258 states and 295 transitions. [2020-12-23 07:13:28,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:13:28,749 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 30 [2020-12-23 07:13:28,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:28,751 INFO L225 Difference]: With dead ends: 258 [2020-12-23 07:13:28,752 INFO L226 Difference]: Without dead ends: 249 [2020-12-23 07:13:28,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:13:28,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-12-23 07:13:28,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 143. [2020-12-23 07:13:28,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-23 07:13:28,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2020-12-23 07:13:28,777 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 30 [2020-12-23 07:13:28,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:28,777 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2020-12-23 07:13:28,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 07:13:28,777 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2020-12-23 07:13:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:13:28,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:28,778 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:28,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:28,990 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:28,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:28,991 INFO L82 PathProgramCache]: Analyzing trace with hash 283195298, now seen corresponding path program 20 times [2020-12-23 07:13:28,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:28,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202661793] [2020-12-23 07:13:28,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:13:29,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202661793] [2020-12-23 07:13:29,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706516877] [2020-12-23 07:13:29,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:29,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:13:29,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:29,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:13:29,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 07:13:29,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:29,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2020-12-23 07:13:29,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322791184] [2020-12-23 07:13:29,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:13:29,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:29,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:13:29,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:13:29,370 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand 16 states. [2020-12-23 07:13:29,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:29,747 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2020-12-23 07:13:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:13:29,747 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-23 07:13:29,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:29,748 INFO L225 Difference]: With dead ends: 217 [2020-12-23 07:13:29,748 INFO L226 Difference]: Without dead ends: 181 [2020-12-23 07:13:29,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:13:29,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-23 07:13:29,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 154. [2020-12-23 07:13:29,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-23 07:13:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2020-12-23 07:13:29,780 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 30 [2020-12-23 07:13:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:29,780 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2020-12-23 07:13:29,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:13:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2020-12-23 07:13:29,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:13:29,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:29,781 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:29,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:29,995 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:29,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:29,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1226887537, now seen corresponding path program 21 times [2020-12-23 07:13:29,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:29,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255731359] [2020-12-23 07:13:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:13:30,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255731359] [2020-12-23 07:13:30,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816580729] [2020-12-23 07:13:30,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:30,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:13:30,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:30,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 07:13:30,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:30,709 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:13:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:13:30,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:30,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2020-12-23 07:13:30,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682071787] [2020-12-23 07:13:30,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 07:13:30,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:30,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 07:13:30,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:13:30,740 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand 27 states. [2020-12-23 07:13:31,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:31,583 INFO L93 Difference]: Finished difference Result 226 states and 258 transitions. [2020-12-23 07:13:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:13:31,583 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-12-23 07:13:31,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:31,585 INFO L225 Difference]: With dead ends: 226 [2020-12-23 07:13:31,585 INFO L226 Difference]: Without dead ends: 204 [2020-12-23 07:13:31,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:13:31,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-12-23 07:13:31,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 153. [2020-12-23 07:13:31,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 07:13:31,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 183 transitions. [2020-12-23 07:13:31,618 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 183 transitions. Word has length 30 [2020-12-23 07:13:31,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:31,618 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 183 transitions. [2020-12-23 07:13:31,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 07:13:31,619 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 183 transitions. [2020-12-23 07:13:31,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:13:31,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:31,620 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:31,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:31,820 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:31,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:31,821 INFO L82 PathProgramCache]: Analyzing trace with hash 628770462, now seen corresponding path program 22 times [2020-12-23 07:13:31,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:31,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527847572] [2020-12-23 07:13:31,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:13:31,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527847572] [2020-12-23 07:13:31,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028512581] [2020-12-23 07:13:31,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:32,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:13:32,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:32,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:13:32,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 07:13:32,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:32,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2020-12-23 07:13:32,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487605461] [2020-12-23 07:13:32,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:13:32,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:32,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:13:32,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:13:32,223 INFO L87 Difference]: Start difference. First operand 153 states and 183 transitions. Second operand 17 states. [2020-12-23 07:13:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:32,556 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2020-12-23 07:13:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:13:32,556 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2020-12-23 07:13:32,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:32,557 INFO L225 Difference]: With dead ends: 186 [2020-12-23 07:13:32,558 INFO L226 Difference]: Without dead ends: 167 [2020-12-23 07:13:32,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:13:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-23 07:13:32,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2020-12-23 07:13:32,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 07:13:32,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 179 transitions. [2020-12-23 07:13:32,592 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 179 transitions. Word has length 30 [2020-12-23 07:13:32,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:32,592 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 179 transitions. [2020-12-23 07:13:32,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:13:32,593 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 179 transitions. [2020-12-23 07:13:32,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:13:32,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:32,594 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:32,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 07:13:32,807 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:32,807 INFO L82 PathProgramCache]: Analyzing trace with hash -335399049, now seen corresponding path program 23 times [2020-12-23 07:13:32,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:32,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489043716] [2020-12-23 07:13:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:32,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489043716] [2020-12-23 07:13:32,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510707686] [2020-12-23 07:13:32,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:33,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 07:13:33,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:33,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:13:33,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:33,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:33,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-12-23 07:13:33,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522643521] [2020-12-23 07:13:33,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 07:13:33,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:33,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 07:13:33,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:13:33,436 INFO L87 Difference]: Start difference. First operand 153 states and 179 transitions. Second operand 23 states. [2020-12-23 07:13:34,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:34,834 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2020-12-23 07:13:34,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:13:34,834 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-12-23 07:13:34,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:34,835 INFO L225 Difference]: With dead ends: 263 [2020-12-23 07:13:34,835 INFO L226 Difference]: Without dead ends: 233 [2020-12-23 07:13:34,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=455, Invalid=1801, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:13:34,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-23 07:13:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 168. [2020-12-23 07:13:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-12-23 07:13:34,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 197 transitions. [2020-12-23 07:13:34,867 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 197 transitions. Word has length 31 [2020-12-23 07:13:34,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:34,868 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 197 transitions. [2020-12-23 07:13:34,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 07:13:34,868 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 197 transitions. [2020-12-23 07:13:34,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:13:34,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:34,869 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:35,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:35,083 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:35,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:35,084 INFO L82 PathProgramCache]: Analyzing trace with hash 883943350, now seen corresponding path program 24 times [2020-12-23 07:13:35,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:35,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576000047] [2020-12-23 07:13:35,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:35,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576000047] [2020-12-23 07:13:35,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733430809] [2020-12-23 07:13:35,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 07:13:35,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 07:13:35,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:35,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:13:35,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:35,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:35,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2020-12-23 07:13:35,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819951865] [2020-12-23 07:13:35,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:13:35,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:35,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:13:35,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:13:35,780 INFO L87 Difference]: Start difference. First operand 168 states and 197 transitions. Second operand 24 states. [2020-12-23 07:13:36,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:36,511 INFO L93 Difference]: Finished difference Result 251 states and 283 transitions. [2020-12-23 07:13:36,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:13:36,512 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2020-12-23 07:13:36,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:36,513 INFO L225 Difference]: With dead ends: 251 [2020-12-23 07:13:36,514 INFO L226 Difference]: Without dead ends: 236 [2020-12-23 07:13:36,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:13:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-12-23 07:13:36,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2020-12-23 07:13:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-23 07:13:36,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2020-12-23 07:13:36,555 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 31 [2020-12-23 07:13:36,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:36,556 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2020-12-23 07:13:36,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:13:36,556 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2020-12-23 07:13:36,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:13:36,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:36,557 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:36,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 07:13:36,772 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:36,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:36,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2026567256, now seen corresponding path program 25 times [2020-12-23 07:13:36,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:36,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308733982] [2020-12-23 07:13:36,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 07:13:36,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308733982] [2020-12-23 07:13:36,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330907666] [2020-12-23 07:13:36,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:36,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:13:36,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 07:13:36,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:36,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 07:13:36,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857786621] [2020-12-23 07:13:36,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:13:36,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:36,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:13:36,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:13:36,988 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand 13 states. [2020-12-23 07:13:37,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:37,101 INFO L93 Difference]: Finished difference Result 227 states and 261 transitions. [2020-12-23 07:13:37,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:13:37,101 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-12-23 07:13:37,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:37,102 INFO L225 Difference]: With dead ends: 227 [2020-12-23 07:13:37,102 INFO L226 Difference]: Without dead ends: 171 [2020-12-23 07:13:37,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:13:37,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-23 07:13:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2020-12-23 07:13:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 07:13:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2020-12-23 07:13:37,136 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 31 [2020-12-23 07:13:37,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:37,136 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2020-12-23 07:13:37,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:13:37,136 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2020-12-23 07:13:37,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:13:37,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:37,137 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:37,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:37,351 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:37,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:37,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1679203531, now seen corresponding path program 26 times [2020-12-23 07:13:37,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:37,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890948672] [2020-12-23 07:13:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 07:13:37,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890948672] [2020-12-23 07:13:37,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245487934] [2020-12-23 07:13:37,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:37,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:13:37,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:37,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:13:37,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 07:13:37,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:37,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 07:13:37,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896701936] [2020-12-23 07:13:37,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:13:37,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:37,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:13:37,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:13:37,591 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand 13 states. [2020-12-23 07:13:37,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:37,726 INFO L93 Difference]: Finished difference Result 178 states and 201 transitions. [2020-12-23 07:13:37,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:13:37,727 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-12-23 07:13:37,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:37,728 INFO L225 Difference]: With dead ends: 178 [2020-12-23 07:13:37,728 INFO L226 Difference]: Without dead ends: 172 [2020-12-23 07:13:37,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:13:37,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-23 07:13:37,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2020-12-23 07:13:37,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-23 07:13:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2020-12-23 07:13:37,766 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 31 [2020-12-23 07:13:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:37,766 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2020-12-23 07:13:37,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:13:37,766 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2020-12-23 07:13:37,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:13:37,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:37,767 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:37,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 07:13:37,981 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:37,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:37,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1999889776, now seen corresponding path program 27 times [2020-12-23 07:13:37,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:37,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803155925] [2020-12-23 07:13:37,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:38,415 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:13:38,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803155925] [2020-12-23 07:13:38,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841556110] [2020-12-23 07:13:38,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:38,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:13:38,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:38,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 07:13:38,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:38,918 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:13:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:13:38,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:38,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 32 [2020-12-23 07:13:38,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599423328] [2020-12-23 07:13:38,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 07:13:38,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:38,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 07:13:38,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:13:38,962 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand 32 states. [2020-12-23 07:13:40,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:40,230 INFO L93 Difference]: Finished difference Result 305 states and 337 transitions. [2020-12-23 07:13:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:13:40,231 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2020-12-23 07:13:40,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:40,232 INFO L225 Difference]: With dead ends: 305 [2020-12-23 07:13:40,232 INFO L226 Difference]: Without dead ends: 296 [2020-12-23 07:13:40,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=251, Invalid=2505, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 07:13:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-12-23 07:13:40,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 167. [2020-12-23 07:13:40,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 07:13:40,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 193 transitions. [2020-12-23 07:13:40,271 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 193 transitions. Word has length 32 [2020-12-23 07:13:40,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:40,271 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 193 transitions. [2020-12-23 07:13:40,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 07:13:40,271 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 193 transitions. [2020-12-23 07:13:40,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:13:40,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:40,272 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:40,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:40,483 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:40,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:40,484 INFO L82 PathProgramCache]: Analyzing trace with hash -120192688, now seen corresponding path program 28 times [2020-12-23 07:13:40,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:40,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785288300] [2020-12-23 07:13:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:13:40,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785288300] [2020-12-23 07:13:40,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020074483] [2020-12-23 07:13:40,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:40,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:13:40,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:40,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 07:13:40,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:41,334 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:13:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:13:41,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:41,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 30 [2020-12-23 07:13:41,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284620715] [2020-12-23 07:13:41,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 07:13:41,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:41,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 07:13:41,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:13:41,374 INFO L87 Difference]: Start difference. First operand 167 states and 193 transitions. Second operand 30 states. [2020-12-23 07:13:42,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:42,480 INFO L93 Difference]: Finished difference Result 223 states and 248 transitions. [2020-12-23 07:13:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:13:42,480 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2020-12-23 07:13:42,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:42,482 INFO L225 Difference]: With dead ends: 223 [2020-12-23 07:13:42,482 INFO L226 Difference]: Without dead ends: 200 [2020-12-23 07:13:42,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=228, Invalid=2028, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:13:42,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-23 07:13:42,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 158. [2020-12-23 07:13:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-23 07:13:42,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2020-12-23 07:13:42,511 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 32 [2020-12-23 07:13:42,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:42,511 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2020-12-23 07:13:42,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 07:13:42,511 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2020-12-23 07:13:42,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:13:42,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:42,512 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:42,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 07:13:42,713 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:42,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:42,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1085561488, now seen corresponding path program 29 times [2020-12-23 07:13:42,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:42,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786996040] [2020-12-23 07:13:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 07:13:42,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786996040] [2020-12-23 07:13:42,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058976462] [2020-12-23 07:13:42,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:43,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 07:13:43,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:43,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 07:13:43,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:43,454 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:13:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 07:13:43,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:43,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2020-12-23 07:13:43,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790250955] [2020-12-23 07:13:43,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 07:13:43,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:43,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 07:13:43,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:13:43,492 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand 28 states. [2020-12-23 07:13:44,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:44,280 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2020-12-23 07:13:44,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:13:44,285 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-12-23 07:13:44,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:44,286 INFO L225 Difference]: With dead ends: 198 [2020-12-23 07:13:44,286 INFO L226 Difference]: Without dead ends: 192 [2020-12-23 07:13:44,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 07:13:44,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-23 07:13:44,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 169. [2020-12-23 07:13:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-23 07:13:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 196 transitions. [2020-12-23 07:13:44,326 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 196 transitions. Word has length 32 [2020-12-23 07:13:44,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:44,327 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 196 transitions. [2020-12-23 07:13:44,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 07:13:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 196 transitions. [2020-12-23 07:13:44,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:13:44,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:44,327 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:44,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 07:13:44,529 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:44,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:44,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1204403466, now seen corresponding path program 30 times [2020-12-23 07:13:44,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:44,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622254969] [2020-12-23 07:13:44,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:44,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622254969] [2020-12-23 07:13:44,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834651223] [2020-12-23 07:13:44,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:44,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 07:13:44,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:44,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:13:44,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:45,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:45,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2020-12-23 07:13:45,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988418646] [2020-12-23 07:13:45,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 07:13:45,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:45,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 07:13:45,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:13:45,291 INFO L87 Difference]: Start difference. First operand 169 states and 196 transitions. Second operand 27 states. [2020-12-23 07:13:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:47,479 INFO L93 Difference]: Finished difference Result 299 states and 335 transitions. [2020-12-23 07:13:47,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 07:13:47,479 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 33 [2020-12-23 07:13:47,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:47,480 INFO L225 Difference]: With dead ends: 299 [2020-12-23 07:13:47,481 INFO L226 Difference]: Without dead ends: 267 [2020-12-23 07:13:47,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=716, Invalid=2944, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 07:13:47,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-23 07:13:47,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 185. [2020-12-23 07:13:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 07:13:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 215 transitions. [2020-12-23 07:13:47,520 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 215 transitions. Word has length 33 [2020-12-23 07:13:47,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:47,520 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 215 transitions. [2020-12-23 07:13:47,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 07:13:47,520 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 215 transitions. [2020-12-23 07:13:47,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:13:47,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:47,521 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:47,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 07:13:47,730 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:47,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:47,731 INFO L82 PathProgramCache]: Analyzing trace with hash -2059494761, now seen corresponding path program 31 times [2020-12-23 07:13:47,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:47,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234748743] [2020-12-23 07:13:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:47,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234748743] [2020-12-23 07:13:47,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299328339] [2020-12-23 07:13:47,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:48,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:13:48,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:13:48,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:48,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2020-12-23 07:13:48,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424793540] [2020-12-23 07:13:48,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 07:13:48,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:48,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 07:13:48,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:13:48,541 INFO L87 Difference]: Start difference. First operand 185 states and 215 transitions. Second operand 28 states. [2020-12-23 07:13:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:49,419 INFO L93 Difference]: Finished difference Result 286 states and 319 transitions. [2020-12-23 07:13:49,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:13:49,420 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2020-12-23 07:13:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:49,421 INFO L225 Difference]: With dead ends: 286 [2020-12-23 07:13:49,422 INFO L226 Difference]: Without dead ends: 270 [2020-12-23 07:13:49,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:13:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-12-23 07:13:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 188. [2020-12-23 07:13:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-23 07:13:49,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 218 transitions. [2020-12-23 07:13:49,472 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 218 transitions. Word has length 33 [2020-12-23 07:13:49,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:49,472 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 218 transitions. [2020-12-23 07:13:49,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 07:13:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 218 transitions. [2020-12-23 07:13:49,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:13:49,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:49,473 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:49,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-23 07:13:49,689 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:49,690 INFO L82 PathProgramCache]: Analyzing trace with hash 893931157, now seen corresponding path program 32 times [2020-12-23 07:13:49,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:49,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396988838] [2020-12-23 07:13:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 07:13:49,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396988838] [2020-12-23 07:13:49,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290545192] [2020-12-23 07:13:49,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:49,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:13:49,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:49,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:13:49,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 07:13:49,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:49,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-12-23 07:13:49,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565744865] [2020-12-23 07:13:49,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:13:49,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:49,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:13:49,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:13:49,930 INFO L87 Difference]: Start difference. First operand 188 states and 218 transitions. Second operand 15 states. [2020-12-23 07:13:50,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:50,134 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2020-12-23 07:13:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:13:50,135 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-12-23 07:13:50,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:50,136 INFO L225 Difference]: With dead ends: 247 [2020-12-23 07:13:50,136 INFO L226 Difference]: Without dead ends: 233 [2020-12-23 07:13:50,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:13:50,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-23 07:13:50,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 210. [2020-12-23 07:13:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-12-23 07:13:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 247 transitions. [2020-12-23 07:13:50,195 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 247 transitions. Word has length 33 [2020-12-23 07:13:50,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:50,196 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 247 transitions. [2020-12-23 07:13:50,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:13:50,196 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 247 transitions. [2020-12-23 07:13:50,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:13:50,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:50,197 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:50,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:50,410 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:50,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:50,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1979153752, now seen corresponding path program 33 times [2020-12-23 07:13:50,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:50,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996077633] [2020-12-23 07:13:50,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 07:13:50,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996077633] [2020-12-23 07:13:50,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424569744] [2020-12-23 07:13:50,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:50,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:13:50,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:50,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:13:50,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 07:13:50,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:50,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-12-23 07:13:50,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228413006] [2020-12-23 07:13:50,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:13:50,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:50,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:13:50,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:13:50,672 INFO L87 Difference]: Start difference. First operand 210 states and 247 transitions. Second operand 15 states. [2020-12-23 07:13:50,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:50,907 INFO L93 Difference]: Finished difference Result 443 states and 524 transitions. [2020-12-23 07:13:50,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:13:50,908 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-12-23 07:13:50,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:50,909 INFO L225 Difference]: With dead ends: 443 [2020-12-23 07:13:50,909 INFO L226 Difference]: Without dead ends: 353 [2020-12-23 07:13:50,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:13:50,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-12-23 07:13:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 248. [2020-12-23 07:13:50,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-12-23 07:13:50,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2020-12-23 07:13:50,978 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 33 [2020-12-23 07:13:50,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:50,978 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2020-12-23 07:13:50,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:13:50,979 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2020-12-23 07:13:50,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:13:50,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:50,980 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:51,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 07:13:51,194 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:51,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:51,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1242809295, now seen corresponding path program 34 times [2020-12-23 07:13:51,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:51,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116345038] [2020-12-23 07:13:51,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:13:51,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116345038] [2020-12-23 07:13:51,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263525987] [2020-12-23 07:13:51,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:51,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:13:51,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:51,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 07:13:51,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:52,248 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:13:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:13:52,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:52,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 35 [2020-12-23 07:13:52,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603989945] [2020-12-23 07:13:52,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 07:13:52,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:52,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 07:13:52,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:13:52,298 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand 35 states. [2020-12-23 07:13:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:54,138 INFO L93 Difference]: Finished difference Result 464 states and 518 transitions. [2020-12-23 07:13:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 07:13:54,139 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2020-12-23 07:13:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:54,141 INFO L225 Difference]: With dead ends: 464 [2020-12-23 07:13:54,141 INFO L226 Difference]: Without dead ends: 455 [2020-12-23 07:13:54,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=270, Invalid=3036, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 07:13:54,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-12-23 07:13:54,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 257. [2020-12-23 07:13:54,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-23 07:13:54,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 302 transitions. [2020-12-23 07:13:54,203 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 302 transitions. Word has length 34 [2020-12-23 07:13:54,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:54,203 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 302 transitions. [2020-12-23 07:13:54,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 07:13:54,204 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 302 transitions. [2020-12-23 07:13:54,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:13:54,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:54,205 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:54,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 07:13:54,417 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:54,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:54,418 INFO L82 PathProgramCache]: Analyzing trace with hash 489303023, now seen corresponding path program 35 times [2020-12-23 07:13:54,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:54,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578940075] [2020-12-23 07:13:54,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:54,831 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:13:54,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578940075] [2020-12-23 07:13:54,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154819897] [2020-12-23 07:13:54,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:54,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 07:13:54,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:54,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 07:13:54,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:55,401 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:13:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:13:55,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:55,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 33 [2020-12-23 07:13:55,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647650830] [2020-12-23 07:13:55,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 07:13:55,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:55,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 07:13:55,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:13:55,443 INFO L87 Difference]: Start difference. First operand 257 states and 302 transitions. Second operand 33 states. [2020-12-23 07:13:56,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:56,768 INFO L93 Difference]: Finished difference Result 364 states and 408 transitions. [2020-12-23 07:13:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 07:13:56,768 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 34 [2020-12-23 07:13:56,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:56,770 INFO L225 Difference]: With dead ends: 364 [2020-12-23 07:13:56,770 INFO L226 Difference]: Without dead ends: 340 [2020-12-23 07:13:56,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=246, Invalid=2510, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 07:13:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-12-23 07:13:56,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 248. [2020-12-23 07:13:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-12-23 07:13:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2020-12-23 07:13:56,832 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 34 [2020-12-23 07:13:56,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:56,832 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2020-12-23 07:13:56,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 07:13:56,832 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2020-12-23 07:13:56,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:13:56,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:56,833 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:57,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:57,048 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:57,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:57,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2122819938, now seen corresponding path program 36 times [2020-12-23 07:13:57,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:57,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165884209] [2020-12-23 07:13:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-23 07:13:57,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165884209] [2020-12-23 07:13:57,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251776117] [2020-12-23 07:13:57,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:57,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 07:13:57,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:57,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:13:57,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 07:13:57,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:57,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2020-12-23 07:13:57,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247773787] [2020-12-23 07:13:57,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 07:13:57,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:57,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 07:13:57,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:13:57,621 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand 20 states. [2020-12-23 07:13:58,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:58,479 INFO L93 Difference]: Finished difference Result 359 states and 413 transitions. [2020-12-23 07:13:58,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:13:58,479 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 34 [2020-12-23 07:13:58,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:58,483 INFO L225 Difference]: With dead ends: 359 [2020-12-23 07:13:58,483 INFO L226 Difference]: Without dead ends: 314 [2020-12-23 07:13:58,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:13:58,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-12-23 07:13:58,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 273. [2020-12-23 07:13:58,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-12-23 07:13:58,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 316 transitions. [2020-12-23 07:13:58,545 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 316 transitions. Word has length 34 [2020-12-23 07:13:58,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:58,545 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 316 transitions. [2020-12-23 07:13:58,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 07:13:58,545 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 316 transitions. [2020-12-23 07:13:58,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:13:58,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:58,546 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:58,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 07:13:58,753 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:58,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:58,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1302431921, now seen corresponding path program 37 times [2020-12-23 07:13:58,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:58,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503368805] [2020-12-23 07:13:58,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 07:13:59,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503368805] [2020-12-23 07:13:59,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783656494] [2020-12-23 07:13:59,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:59,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 07:13:59,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:59,725 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:13:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 07:13:59,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:13:59,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2020-12-23 07:13:59,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602944282] [2020-12-23 07:13:59,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 07:13:59,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:59,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 07:13:59,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:13:59,766 INFO L87 Difference]: Start difference. First operand 273 states and 316 transitions. Second operand 31 states. [2020-12-23 07:14:00,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:00,853 INFO L93 Difference]: Finished difference Result 352 states and 398 transitions. [2020-12-23 07:14:00,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 07:14:00,854 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-12-23 07:14:00,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:00,857 INFO L225 Difference]: With dead ends: 352 [2020-12-23 07:14:00,857 INFO L226 Difference]: Without dead ends: 327 [2020-12-23 07:14:00,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=240, Invalid=2112, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:14:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-12-23 07:14:00,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2020-12-23 07:14:00,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-23 07:14:00,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 315 transitions. [2020-12-23 07:14:00,939 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 315 transitions. Word has length 34 [2020-12-23 07:14:00,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:00,939 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 315 transitions. [2020-12-23 07:14:00,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 07:14:00,940 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 315 transitions. [2020-12-23 07:14:00,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:14:00,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:00,940 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:01,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:01,154 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:01,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:01,155 INFO L82 PathProgramCache]: Analyzing trace with hash -266355998, now seen corresponding path program 38 times [2020-12-23 07:14:01,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:01,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402694780] [2020-12-23 07:14:01,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-23 07:14:01,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402694780] [2020-12-23 07:14:01,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040439527] [2020-12-23 07:14:01,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:01,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:14:01,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:01,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:14:01,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 07:14:01,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:01,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2020-12-23 07:14:01,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70002606] [2020-12-23 07:14:01,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:14:01,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:01,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:14:01,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:14:01,680 INFO L87 Difference]: Start difference. First operand 271 states and 315 transitions. Second operand 21 states. [2020-12-23 07:14:02,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:02,170 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2020-12-23 07:14:02,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:14:02,170 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2020-12-23 07:14:02,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:02,172 INFO L225 Difference]: With dead ends: 318 [2020-12-23 07:14:02,172 INFO L226 Difference]: Without dead ends: 294 [2020-12-23 07:14:02,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:14:02,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-12-23 07:14:02,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 271. [2020-12-23 07:14:02,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-23 07:14:02,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 309 transitions. [2020-12-23 07:14:02,255 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 309 transitions. Word has length 34 [2020-12-23 07:14:02,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:02,255 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 309 transitions. [2020-12-23 07:14:02,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:14:02,255 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 309 transitions. [2020-12-23 07:14:02,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 07:14:02,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:02,256 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:02,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 07:14:02,471 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:02,472 INFO L82 PathProgramCache]: Analyzing trace with hash 535019927, now seen corresponding path program 39 times [2020-12-23 07:14:02,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:02,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692571772] [2020-12-23 07:14:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:14:02,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692571772] [2020-12-23 07:14:02,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931100819] [2020-12-23 07:14:02,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:02,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 07:14:02,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:02,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:14:02,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:14:03,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:03,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2020-12-23 07:14:03,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443606420] [2020-12-23 07:14:03,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 07:14:03,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:03,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 07:14:03,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:14:03,469 INFO L87 Difference]: Start difference. First operand 271 states and 309 transitions. Second operand 31 states. [2020-12-23 07:14:06,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:06,757 INFO L93 Difference]: Finished difference Result 470 states and 520 transitions. [2020-12-23 07:14:06,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 07:14:06,758 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-12-23 07:14:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:06,759 INFO L225 Difference]: With dead ends: 470 [2020-12-23 07:14:06,759 INFO L226 Difference]: Without dead ends: 434 [2020-12-23 07:14:06,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1061, Invalid=4489, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 07:14:06,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-12-23 07:14:06,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 301. [2020-12-23 07:14:06,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-12-23 07:14:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 343 transitions. [2020-12-23 07:14:06,859 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 343 transitions. Word has length 35 [2020-12-23 07:14:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:06,860 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 343 transitions. [2020-12-23 07:14:06,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 07:14:06,860 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 343 transitions. [2020-12-23 07:14:06,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 07:14:06,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:06,861 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:07,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 07:14:07,075 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:07,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:07,076 INFO L82 PathProgramCache]: Analyzing trace with hash -203006442, now seen corresponding path program 40 times [2020-12-23 07:14:07,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:07,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597030425] [2020-12-23 07:14:07,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:14:07,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597030425] [2020-12-23 07:14:07,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788853527] [2020-12-23 07:14:07,390 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 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 07:14:07,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:14:07,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:07,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:14:07,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:14:08,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:08,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2020-12-23 07:14:08,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952665372] [2020-12-23 07:14:08,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 07:14:08,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:08,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 07:14:08,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:14:08,152 INFO L87 Difference]: Start difference. First operand 301 states and 343 transitions. Second operand 32 states. [2020-12-23 07:14:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:09,469 INFO L93 Difference]: Finished difference Result 456 states and 502 transitions. [2020-12-23 07:14:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:14:09,470 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-12-23 07:14:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:09,472 INFO L225 Difference]: With dead ends: 456 [2020-12-23 07:14:09,472 INFO L226 Difference]: Without dead ends: 438 [2020-12-23 07:14:09,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:14:09,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-12-23 07:14:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 305. [2020-12-23 07:14:09,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-12-23 07:14:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 347 transitions. [2020-12-23 07:14:09,586 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 347 transitions. Word has length 35 [2020-12-23 07:14:09,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:09,586 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 347 transitions. [2020-12-23 07:14:09,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 07:14:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 347 transitions. [2020-12-23 07:14:09,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 07:14:09,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:09,588 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:09,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 07:14:09,801 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:09,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:09,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1280821844, now seen corresponding path program 41 times [2020-12-23 07:14:09,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:09,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427532963] [2020-12-23 07:14:09,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:14:09,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427532963] [2020-12-23 07:14:09,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681275512] [2020-12-23 07:14:09,885 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 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 07:14:09,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 07:14:09,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:09,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:14:09,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:14:10,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:10,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-23 07:14:10,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103630279] [2020-12-23 07:14:10,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:14:10,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:10,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:14:10,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:14:10,075 INFO L87 Difference]: Start difference. First operand 305 states and 347 transitions. Second operand 16 states. [2020-12-23 07:14:10,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:10,345 INFO L93 Difference]: Finished difference Result 394 states and 444 transitions. [2020-12-23 07:14:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:14:10,346 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-12-23 07:14:10,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:10,348 INFO L225 Difference]: With dead ends: 394 [2020-12-23 07:14:10,348 INFO L226 Difference]: Without dead ends: 314 [2020-12-23 07:14:10,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:14:10,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-12-23 07:14:10,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 291. [2020-12-23 07:14:10,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-12-23 07:14:10,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 329 transitions. [2020-12-23 07:14:10,412 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 329 transitions. Word has length 35 [2020-12-23 07:14:10,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:10,412 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 329 transitions. [2020-12-23 07:14:10,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:14:10,412 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 329 transitions. [2020-12-23 07:14:10,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 07:14:10,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:10,413 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:10,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-23 07:14:10,619 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:10,620 INFO L82 PathProgramCache]: Analyzing trace with hash 365909845, now seen corresponding path program 42 times [2020-12-23 07:14:10,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:10,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377314216] [2020-12-23 07:14:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:14:10,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377314216] [2020-12-23 07:14:10,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882201932] [2020-12-23 07:14:10,715 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 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 07:14:10,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 07:14:10,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:10,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:14:10,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:14:10,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:10,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-23 07:14:10,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721715665] [2020-12-23 07:14:10,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:14:10,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:10,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:14:10,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:14:10,922 INFO L87 Difference]: Start difference. First operand 291 states and 329 transitions. Second operand 16 states. [2020-12-23 07:14:11,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:11,168 INFO L93 Difference]: Finished difference Result 321 states and 356 transitions. [2020-12-23 07:14:11,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:14:11,168 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-12-23 07:14:11,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:11,169 INFO L225 Difference]: With dead ends: 321 [2020-12-23 07:14:11,169 INFO L226 Difference]: Without dead ends: 315 [2020-12-23 07:14:11,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:14:11,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-12-23 07:14:11,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 292. [2020-12-23 07:14:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-12-23 07:14:11,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2020-12-23 07:14:11,263 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 35 [2020-12-23 07:14:11,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:11,263 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2020-12-23 07:14:11,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:14:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2020-12-23 07:14:11,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:14:11,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:11,264 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:11,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:11,478 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:11,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:11,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1335594960, now seen corresponding path program 43 times [2020-12-23 07:14:11,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:11,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684127213] [2020-12-23 07:14:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:14:12,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684127213] [2020-12-23 07:14:12,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854906856] [2020-12-23 07:14:12,107 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 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 07:14:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:12,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 07:14:12,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:12,799 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:14:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:14:12,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:12,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 38 [2020-12-23 07:14:12,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578258204] [2020-12-23 07:14:12,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 07:14:12,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:12,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 07:14:12,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1317, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:14:12,852 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand 38 states. [2020-12-23 07:14:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:15,039 INFO L93 Difference]: Finished difference Result 540 states and 587 transitions. [2020-12-23 07:14:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 07:14:15,040 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 36 [2020-12-23 07:14:15,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:15,042 INFO L225 Difference]: With dead ends: 540 [2020-12-23 07:14:15,042 INFO L226 Difference]: Without dead ends: 531 [2020-12-23 07:14:15,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=289, Invalid=3617, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:14:15,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2020-12-23 07:14:15,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 301. [2020-12-23 07:14:15,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-12-23 07:14:15,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 340 transitions. [2020-12-23 07:14:15,119 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 340 transitions. Word has length 36 [2020-12-23 07:14:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:15,119 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 340 transitions. [2020-12-23 07:14:15,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 07:14:15,119 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 340 transitions. [2020-12-23 07:14:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:14:15,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:15,120 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:15,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-23 07:14:15,336 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:15,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1858622864, now seen corresponding path program 44 times [2020-12-23 07:14:15,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:15,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281561083] [2020-12-23 07:14:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:14:15,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281561083] [2020-12-23 07:14:15,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361853627] [2020-12-23 07:14:15,899 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 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 07:14:15,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:14:15,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:15,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 07:14:15,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:16,594 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:14:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:14:16,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:16,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 36 [2020-12-23 07:14:16,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806892683] [2020-12-23 07:14:16,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 07:14:16,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:16,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 07:14:16,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1172, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:14:16,645 INFO L87 Difference]: Start difference. First operand 301 states and 340 transitions. Second operand 36 states. [2020-12-23 07:14:18,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:18,431 INFO L93 Difference]: Finished difference Result 427 states and 465 transitions. [2020-12-23 07:14:18,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:14:18,433 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2020-12-23 07:14:18,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:18,435 INFO L225 Difference]: With dead ends: 427 [2020-12-23 07:14:18,435 INFO L226 Difference]: Without dead ends: 402 [2020-12-23 07:14:18,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=264, Invalid=3042, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 07:14:18,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-12-23 07:14:18,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2020-12-23 07:14:18,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-12-23 07:14:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2020-12-23 07:14:18,519 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 36 [2020-12-23 07:14:18,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:18,519 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2020-12-23 07:14:18,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 07:14:18,519 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2020-12-23 07:14:18,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:14:18,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:18,520 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:18,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:18,735 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:18,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:18,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1659359184, now seen corresponding path program 45 times [2020-12-23 07:14:18,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:18,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918771751] [2020-12-23 07:14:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 07:14:19,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918771751] [2020-12-23 07:14:19,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582772385] [2020-12-23 07:14:19,218 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 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 07:14:19,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:14:19,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:19,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 07:14:19,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:19,882 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:14:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 07:14:19,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:19,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 34 [2020-12-23 07:14:19,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228074541] [2020-12-23 07:14:19,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 07:14:19,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:19,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 07:14:19,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:14:19,931 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand 34 states. [2020-12-23 07:14:21,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:21,378 INFO L93 Difference]: Finished difference Result 352 states and 389 transitions. [2020-12-23 07:14:21,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:14:21,379 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 36 [2020-12-23 07:14:21,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:21,380 INFO L225 Difference]: With dead ends: 352 [2020-12-23 07:14:21,381 INFO L226 Difference]: Without dead ends: 326 [2020-12-23 07:14:21,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=258, Invalid=2604, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:14:21,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-12-23 07:14:21,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2020-12-23 07:14:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-12-23 07:14:21,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 318 transitions. [2020-12-23 07:14:21,447 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 318 transitions. Word has length 36 [2020-12-23 07:14:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:21,448 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 318 transitions. [2020-12-23 07:14:21,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 07:14:21,448 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 318 transitions. [2020-12-23 07:14:21,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:14:21,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:21,448 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:21,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 07:14:21,649 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:21,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:21,650 INFO L82 PathProgramCache]: Analyzing trace with hash 59566704, now seen corresponding path program 46 times [2020-12-23 07:14:21,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:21,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502260613] [2020-12-23 07:14:21,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 07:14:22,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502260613] [2020-12-23 07:14:22,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455872312] [2020-12-23 07:14:22,054 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 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 07:14:22,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:14:22,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:22,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 07:14:22,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:22,717 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:14:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 07:14:22,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:22,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2020-12-23 07:14:22,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886160691] [2020-12-23 07:14:22,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 07:14:22,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:22,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 07:14:22,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:14:22,764 INFO L87 Difference]: Start difference. First operand 281 states and 318 transitions. Second operand 32 states. [2020-12-23 07:14:23,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:23,937 INFO L93 Difference]: Finished difference Result 324 states and 363 transitions. [2020-12-23 07:14:23,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:14:23,938 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-12-23 07:14:23,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:23,940 INFO L225 Difference]: With dead ends: 324 [2020-12-23 07:14:23,940 INFO L226 Difference]: Without dead ends: 318 [2020-12-23 07:14:23,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=252, Invalid=2198, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:14:23,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-23 07:14:24,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 293. [2020-12-23 07:14:24,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-12-23 07:14:24,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 332 transitions. [2020-12-23 07:14:24,005 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 332 transitions. Word has length 36 [2020-12-23 07:14:24,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:24,005 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 332 transitions. [2020-12-23 07:14:24,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 07:14:24,005 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 332 transitions. [2020-12-23 07:14:24,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:14:24,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:24,006 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:24,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 07:14:24,217 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:24,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:24,218 INFO L82 PathProgramCache]: Analyzing trace with hash -2086100650, now seen corresponding path program 47 times [2020-12-23 07:14:24,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:24,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49231778] [2020-12-23 07:14:24,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:14:24,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49231778] [2020-12-23 07:14:24,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538100914] [2020-12-23 07:14:24,591 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 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 07:14:24,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 07:14:24,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:24,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:14:24,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:14:25,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:25,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2020-12-23 07:14:25,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900753025] [2020-12-23 07:14:25,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 07:14:25,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:25,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 07:14:25,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:14:25,543 INFO L87 Difference]: Start difference. First operand 293 states and 332 transitions. Second operand 35 states. [2020-12-23 07:14:30,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:30,229 INFO L93 Difference]: Finished difference Result 520 states and 571 transitions. [2020-12-23 07:14:30,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 07:14:30,230 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2020-12-23 07:14:30,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:30,231 INFO L225 Difference]: With dead ends: 520 [2020-12-23 07:14:30,231 INFO L226 Difference]: Without dead ends: 482 [2020-12-23 07:14:30,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1504, Invalid=6506, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 07:14:30,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-12-23 07:14:30,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 324. [2020-12-23 07:14:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-12-23 07:14:30,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 367 transitions. [2020-12-23 07:14:30,309 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 367 transitions. Word has length 37 [2020-12-23 07:14:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:30,309 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 367 transitions. [2020-12-23 07:14:30,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 07:14:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 367 transitions. [2020-12-23 07:14:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:14:30,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:30,310 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:30,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:30,511 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:30,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:30,512 INFO L82 PathProgramCache]: Analyzing trace with hash 804885687, now seen corresponding path program 48 times [2020-12-23 07:14:30,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:30,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196809737] [2020-12-23 07:14:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:30,926 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:14:30,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196809737] [2020-12-23 07:14:30,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211056759] [2020-12-23 07:14:30,928 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 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 07:14:30,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 07:14:30,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:30,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:14:31,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:14:31,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:31,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2020-12-23 07:14:31,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995606479] [2020-12-23 07:14:31,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 07:14:31,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:31,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 07:14:31,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:14:31,918 INFO L87 Difference]: Start difference. First operand 324 states and 367 transitions. Second operand 36 states. [2020-12-23 07:14:33,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:33,822 INFO L93 Difference]: Finished difference Result 505 states and 552 transitions. [2020-12-23 07:14:33,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:14:33,822 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 37 [2020-12-23 07:14:33,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:33,824 INFO L225 Difference]: With dead ends: 505 [2020-12-23 07:14:33,824 INFO L226 Difference]: Without dead ends: 486 [2020-12-23 07:14:33,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=188, Invalid=1792, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:14:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-12-23 07:14:33,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 328. [2020-12-23 07:14:33,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-12-23 07:14:33,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 371 transitions. [2020-12-23 07:14:33,912 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 371 transitions. Word has length 37 [2020-12-23 07:14:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:33,912 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 371 transitions. [2020-12-23 07:14:33,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 07:14:33,912 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 371 transitions. [2020-12-23 07:14:33,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:14:33,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:33,913 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:34,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-23 07:14:34,128 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:34,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:34,128 INFO L82 PathProgramCache]: Analyzing trace with hash -847136075, now seen corresponding path program 49 times [2020-12-23 07:14:34,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:34,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255507694] [2020-12-23 07:14:34,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:14:34,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255507694] [2020-12-23 07:14:34,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123900057] [2020-12-23 07:14:34,228 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 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 07:14:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:34,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:14:34,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:14:34,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:34,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2020-12-23 07:14:34,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099492559] [2020-12-23 07:14:34,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:14:34,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:34,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:14:34,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:14:34,462 INFO L87 Difference]: Start difference. First operand 328 states and 371 transitions. Second operand 18 states. [2020-12-23 07:14:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:34,917 INFO L93 Difference]: Finished difference Result 404 states and 454 transitions. [2020-12-23 07:14:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:14:34,918 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-12-23 07:14:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:34,920 INFO L225 Difference]: With dead ends: 404 [2020-12-23 07:14:34,920 INFO L226 Difference]: Without dead ends: 389 [2020-12-23 07:14:34,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:14:34,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-12-23 07:14:35,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 356. [2020-12-23 07:14:35,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-12-23 07:14:35,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 408 transitions. [2020-12-23 07:14:35,003 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 408 transitions. Word has length 37 [2020-12-23 07:14:35,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:35,003 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 408 transitions. [2020-12-23 07:14:35,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:14:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 408 transitions. [2020-12-23 07:14:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:14:35,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:35,004 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:35,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 07:14:35,205 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:35,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:35,206 INFO L82 PathProgramCache]: Analyzing trace with hash 855363028, now seen corresponding path program 50 times [2020-12-23 07:14:35,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:35,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134218396] [2020-12-23 07:14:35,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:14:35,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134218396] [2020-12-23 07:14:35,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652718609] [2020-12-23 07:14:35,309 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 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 07:14:35,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:14:35,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:35,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:14:35,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:14:35,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:35,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2020-12-23 07:14:35,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483477360] [2020-12-23 07:14:35,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:14:35,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:35,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:14:35,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:14:35,534 INFO L87 Difference]: Start difference. First operand 356 states and 408 transitions. Second operand 18 states. [2020-12-23 07:14:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:35,971 INFO L93 Difference]: Finished difference Result 685 states and 794 transitions. [2020-12-23 07:14:35,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:14:35,972 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-12-23 07:14:35,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:35,975 INFO L225 Difference]: With dead ends: 685 [2020-12-23 07:14:35,975 INFO L226 Difference]: Without dead ends: 561 [2020-12-23 07:14:35,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:14:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2020-12-23 07:14:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 414. [2020-12-23 07:14:36,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-12-23 07:14:36,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2020-12-23 07:14:36,082 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 37 [2020-12-23 07:14:36,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:36,083 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2020-12-23 07:14:36,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:14:36,083 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2020-12-23 07:14:36,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:14:36,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:36,084 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:36,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 07:14:36,299 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:36,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:36,299 INFO L82 PathProgramCache]: Analyzing trace with hash -155710033, now seen corresponding path program 51 times [2020-12-23 07:14:36,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:36,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756891441] [2020-12-23 07:14:36,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:14:37,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756891441] [2020-12-23 07:14:37,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917705290] [2020-12-23 07:14:37,088 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 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 07:14:37,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 07:14:37,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:37,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 07:14:37,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:37,952 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:14:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:14:38,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:38,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 41 [2020-12-23 07:14:38,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481926384] [2020-12-23 07:14:38,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 07:14:38,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:38,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 07:14:38,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1544, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:14:38,013 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand 41 states. [2020-12-23 07:14:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:41,063 INFO L93 Difference]: Finished difference Result 761 states and 834 transitions. [2020-12-23 07:14:41,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 07:14:41,064 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 38 [2020-12-23 07:14:41,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:41,066 INFO L225 Difference]: With dead ends: 761 [2020-12-23 07:14:41,066 INFO L226 Difference]: Without dead ends: 752 [2020-12-23 07:14:41,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=308, Invalid=4248, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 07:14:41,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2020-12-23 07:14:41,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 423. [2020-12-23 07:14:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2020-12-23 07:14:41,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 485 transitions. [2020-12-23 07:14:41,180 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 485 transitions. Word has length 38 [2020-12-23 07:14:41,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:41,181 INFO L481 AbstractCegarLoop]: Abstraction has 423 states and 485 transitions. [2020-12-23 07:14:41,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 07:14:41,181 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 485 transitions. [2020-12-23 07:14:41,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:14:41,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:41,181 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:41,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:41,382 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:41,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:41,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1493827249, now seen corresponding path program 52 times [2020-12-23 07:14:41,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:41,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805069090] [2020-12-23 07:14:41,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:14:42,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805069090] [2020-12-23 07:14:42,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090698476] [2020-12-23 07:14:42,078 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 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 07:14:42,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:14:42,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:42,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 07:14:42,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:42,932 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:14:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:14:42,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:42,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 39 [2020-12-23 07:14:42,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084797062] [2020-12-23 07:14:42,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 07:14:42,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:42,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 07:14:42,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1387, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:14:42,990 INFO L87 Difference]: Start difference. First operand 423 states and 485 transitions. Second operand 39 states. [2020-12-23 07:14:45,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:45,522 INFO L93 Difference]: Finished difference Result 623 states and 684 transitions. [2020-12-23 07:14:45,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 07:14:45,522 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2020-12-23 07:14:45,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:45,524 INFO L225 Difference]: With dead ends: 623 [2020-12-23 07:14:45,524 INFO L226 Difference]: Without dead ends: 597 [2020-12-23 07:14:45,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=282, Invalid=3624, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:14:45,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2020-12-23 07:14:45,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 414. [2020-12-23 07:14:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-12-23 07:14:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2020-12-23 07:14:45,654 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 38 [2020-12-23 07:14:45,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:45,654 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2020-12-23 07:14:45,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 07:14:45,654 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2020-12-23 07:14:45,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:14:45,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:45,655 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:45,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:45,856 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:45,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:45,857 INFO L82 PathProgramCache]: Analyzing trace with hash -375561937, now seen corresponding path program 53 times [2020-12-23 07:14:45,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:45,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976615556] [2020-12-23 07:14:45,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 07:14:46,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976615556] [2020-12-23 07:14:46,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443742368] [2020-12-23 07:14:46,461 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 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 07:14:46,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 07:14:46,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:46,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 07:14:46,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:47,257 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:14:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 07:14:47,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:47,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 37 [2020-12-23 07:14:47,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641951890] [2020-12-23 07:14:47,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 07:14:47,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:47,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 07:14:47,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:14:47,318 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand 37 states. [2020-12-23 07:14:49,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:49,246 INFO L93 Difference]: Finished difference Result 530 states and 590 transitions. [2020-12-23 07:14:49,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:14:49,247 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 38 [2020-12-23 07:14:49,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:49,250 INFO L225 Difference]: With dead ends: 530 [2020-12-23 07:14:49,250 INFO L226 Difference]: Without dead ends: 503 [2020-12-23 07:14:49,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=276, Invalid=3146, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 07:14:49,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2020-12-23 07:14:49,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 403. [2020-12-23 07:14:49,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-12-23 07:14:49,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 463 transitions. [2020-12-23 07:14:49,380 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 463 transitions. Word has length 38 [2020-12-23 07:14:49,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:49,380 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 463 transitions. [2020-12-23 07:14:49,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 07:14:49,380 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 463 transitions. [2020-12-23 07:14:49,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:14:49,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:49,381 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:49,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:49,596 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:49,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:49,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1552999778, now seen corresponding path program 54 times [2020-12-23 07:14:49,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:49,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529909845] [2020-12-23 07:14:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 07:14:49,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529909845] [2020-12-23 07:14:49,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541081071] [2020-12-23 07:14:49,803 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 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 07:14:49,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 07:14:49,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:49,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:14:49,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 07:14:50,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:50,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2020-12-23 07:14:50,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314031765] [2020-12-23 07:14:50,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:14:50,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:50,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:14:50,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:14:50,440 INFO L87 Difference]: Start difference. First operand 403 states and 463 transitions. Second operand 24 states. [2020-12-23 07:14:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:52,132 INFO L93 Difference]: Finished difference Result 556 states and 629 transitions. [2020-12-23 07:14:52,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:14:52,133 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 38 [2020-12-23 07:14:52,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:52,135 INFO L225 Difference]: With dead ends: 556 [2020-12-23 07:14:52,136 INFO L226 Difference]: Without dead ends: 502 [2020-12-23 07:14:52,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=479, Invalid=1873, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:14:52,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-12-23 07:14:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 446. [2020-12-23 07:14:52,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 446 states. [2020-12-23 07:14:52,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 505 transitions. [2020-12-23 07:14:52,257 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 505 transitions. Word has length 38 [2020-12-23 07:14:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:52,258 INFO L481 AbstractCegarLoop]: Abstraction has 446 states and 505 transitions. [2020-12-23 07:14:52,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:14:52,258 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 505 transitions. [2020-12-23 07:14:52,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:14:52,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:52,259 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:52,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:52,465 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:52,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:52,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1465831985, now seen corresponding path program 55 times [2020-12-23 07:14:52,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:52,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682842940] [2020-12-23 07:14:52,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 07:14:52,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682842940] [2020-12-23 07:14:52,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585399448] [2020-12-23 07:14:52,989 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:53,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 07:14:53,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:53,774 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:14:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 07:14:53,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:53,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2020-12-23 07:14:53,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723576702] [2020-12-23 07:14:53,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 07:14:53,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:53,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 07:14:53,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1097, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:14:53,824 INFO L87 Difference]: Start difference. First operand 446 states and 505 transitions. Second operand 35 states. [2020-12-23 07:14:55,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:55,447 INFO L93 Difference]: Finished difference Result 532 states and 594 transitions. [2020-12-23 07:14:55,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:14:55,448 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-12-23 07:14:55,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:55,450 INFO L225 Difference]: With dead ends: 532 [2020-12-23 07:14:55,450 INFO L226 Difference]: Without dead ends: 504 [2020-12-23 07:14:55,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=270, Invalid=2700, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:14:55,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-12-23 07:14:55,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 443. [2020-12-23 07:14:55,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-12-23 07:14:55,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 503 transitions. [2020-12-23 07:14:55,576 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 503 transitions. Word has length 38 [2020-12-23 07:14:55,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:55,576 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 503 transitions. [2020-12-23 07:14:55,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 07:14:55,576 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 503 transitions. [2020-12-23 07:14:55,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:14:55,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:55,577 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:55,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-12-23 07:14:55,783 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:55,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:55,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1135200674, now seen corresponding path program 56 times [2020-12-23 07:14:55,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:55,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883405415] [2020-12-23 07:14:55,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 07:14:56,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883405415] [2020-12-23 07:14:56,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893826209] [2020-12-23 07:14:56,038 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:56,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:14:56,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:56,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:14:56,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 07:14:56,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:56,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2020-12-23 07:14:56,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158937135] [2020-12-23 07:14:56,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:14:56,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:56,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:14:56,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:14:56,585 INFO L87 Difference]: Start difference. First operand 443 states and 503 transitions. Second operand 25 states. [2020-12-23 07:14:57,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:57,426 INFO L93 Difference]: Finished difference Result 505 states and 561 transitions. [2020-12-23 07:14:57,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:14:57,427 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2020-12-23 07:14:57,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:57,428 INFO L225 Difference]: With dead ends: 505 [2020-12-23 07:14:57,428 INFO L226 Difference]: Without dead ends: 476 [2020-12-23 07:14:57,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:14:57,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-12-23 07:14:57,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 443. [2020-12-23 07:14:57,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-12-23 07:14:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 495 transitions. [2020-12-23 07:14:57,546 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 495 transitions. Word has length 38 [2020-12-23 07:14:57,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:57,546 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 495 transitions. [2020-12-23 07:14:57,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:14:57,546 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 495 transitions. [2020-12-23 07:14:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:14:57,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:57,547 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:57,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:57,748 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:57,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:57,749 INFO L82 PathProgramCache]: Analyzing trace with hash 130593719, now seen corresponding path program 57 times [2020-12-23 07:14:57,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:57,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078871390] [2020-12-23 07:14:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:14:58,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078871390] [2020-12-23 07:14:58,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345332629] [2020-12-23 07:14:58,219 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:58,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 07:14:58,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:58,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:14:58,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:14:59,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:14:59,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2020-12-23 07:14:59,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282062532] [2020-12-23 07:14:59,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 07:14:59,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:59,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 07:14:59,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:14:59,442 INFO L87 Difference]: Start difference. First operand 443 states and 495 transitions. Second operand 39 states. [2020-12-23 07:15:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:06,575 INFO L93 Difference]: Finished difference Result 768 states and 835 transitions. [2020-12-23 07:15:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 07:15:06,576 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2020-12-23 07:15:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:06,578 INFO L225 Difference]: With dead ends: 768 [2020-12-23 07:15:06,578 INFO L226 Difference]: Without dead ends: 726 [2020-12-23 07:15:06,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2060, Invalid=9070, Unknown=0, NotChecked=0, Total=11130 [2020-12-23 07:15:06,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2020-12-23 07:15:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 490. [2020-12-23 07:15:06,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-12-23 07:15:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 547 transitions. [2020-12-23 07:15:06,735 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 547 transitions. Word has length 39 [2020-12-23 07:15:06,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:06,735 INFO L481 AbstractCegarLoop]: Abstraction has 490 states and 547 transitions. [2020-12-23 07:15:06,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 07:15:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 547 transitions. [2020-12-23 07:15:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:15:06,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:06,736 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:06,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 07:15:06,947 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:06,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:06,948 INFO L82 PathProgramCache]: Analyzing trace with hash -443143050, now seen corresponding path program 58 times [2020-12-23 07:15:06,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:06,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190702205] [2020-12-23 07:15:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:15:07,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190702205] [2020-12-23 07:15:07,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008401343] [2020-12-23 07:15:07,473 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:07,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:15:07,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:07,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:15:07,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:15:08,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:08,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2020-12-23 07:15:08,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319940398] [2020-12-23 07:15:08,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 07:15:08,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:08,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 07:15:08,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:15:08,783 INFO L87 Difference]: Start difference. First operand 490 states and 547 transitions. Second operand 40 states. [2020-12-23 07:15:11,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:11,251 INFO L93 Difference]: Finished difference Result 752 states and 814 transitions. [2020-12-23 07:15:11,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:15:11,253 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2020-12-23 07:15:11,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:11,256 INFO L225 Difference]: With dead ends: 752 [2020-12-23 07:15:11,256 INFO L226 Difference]: Without dead ends: 731 [2020-12-23 07:15:11,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=215, Invalid=2235, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:15:11,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2020-12-23 07:15:11,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 495. [2020-12-23 07:15:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-12-23 07:15:11,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 552 transitions. [2020-12-23 07:15:11,396 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 552 transitions. Word has length 39 [2020-12-23 07:15:11,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:11,396 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 552 transitions. [2020-12-23 07:15:11,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 07:15:11,396 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 552 transitions. [2020-12-23 07:15:11,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:15:11,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:11,397 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:11,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:11,604 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:11,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:11,604 INFO L82 PathProgramCache]: Analyzing trace with hash -24932840, now seen corresponding path program 59 times [2020-12-23 07:15:11,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:11,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282149639] [2020-12-23 07:15:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 07:15:11,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282149639] [2020-12-23 07:15:11,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280458783] [2020-12-23 07:15:11,742 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:11,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 07:15:11,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:11,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:15:11,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 07:15:11,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:11,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2020-12-23 07:15:11,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850425013] [2020-12-23 07:15:11,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:15:11,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:11,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:15:11,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:15:11,993 INFO L87 Difference]: Start difference. First operand 495 states and 552 transitions. Second operand 19 states. [2020-12-23 07:15:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:12,543 INFO L93 Difference]: Finished difference Result 622 states and 690 transitions. [2020-12-23 07:15:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 07:15:12,544 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2020-12-23 07:15:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:12,546 INFO L225 Difference]: With dead ends: 622 [2020-12-23 07:15:12,546 INFO L226 Difference]: Without dead ends: 514 [2020-12-23 07:15:12,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:15:12,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-12-23 07:15:12,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 481. [2020-12-23 07:15:12,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-12-23 07:15:12,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 534 transitions. [2020-12-23 07:15:12,679 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 534 transitions. Word has length 39 [2020-12-23 07:15:12,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:12,679 INFO L481 AbstractCegarLoop]: Abstraction has 481 states and 534 transitions. [2020-12-23 07:15:12,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:15:12,679 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 534 transitions. [2020-12-23 07:15:12,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:15:12,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:12,680 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:12,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 07:15:12,881 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:12,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:12,882 INFO L82 PathProgramCache]: Analyzing trace with hash -601397259, now seen corresponding path program 60 times [2020-12-23 07:15:12,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:12,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878753968] [2020-12-23 07:15:12,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 07:15:13,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878753968] [2020-12-23 07:15:13,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117947380] [2020-12-23 07:15:13,024 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:13,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 07:15:13,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:13,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:15:13,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 07:15:13,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:13,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2020-12-23 07:15:13,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30348757] [2020-12-23 07:15:13,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:15:13,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:13,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:15:13,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:15:13,280 INFO L87 Difference]: Start difference. First operand 481 states and 534 transitions. Second operand 19 states. [2020-12-23 07:15:13,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:13,766 INFO L93 Difference]: Finished difference Result 521 states and 570 transitions. [2020-12-23 07:15:13,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 07:15:13,767 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2020-12-23 07:15:13,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:13,768 INFO L225 Difference]: With dead ends: 521 [2020-12-23 07:15:13,768 INFO L226 Difference]: Without dead ends: 515 [2020-12-23 07:15:13,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:15:13,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-12-23 07:15:13,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 482. [2020-12-23 07:15:13,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2020-12-23 07:15:13,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2020-12-23 07:15:13,908 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 39 [2020-12-23 07:15:13,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:13,908 INFO L481 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2020-12-23 07:15:13,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:15:13,908 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2020-12-23 07:15:13,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 07:15:13,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:13,909 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:14,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:14,110 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:14,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:14,110 INFO L82 PathProgramCache]: Analyzing trace with hash -189895216, now seen corresponding path program 61 times [2020-12-23 07:15:14,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:14,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900719748] [2020-12-23 07:15:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:15:15,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900719748] [2020-12-23 07:15:15,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707400107] [2020-12-23 07:15:15,095 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:15,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 07:15:15,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:16,149 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:15:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:15:16,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:16,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 44 [2020-12-23 07:15:16,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208885945] [2020-12-23 07:15:16,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 07:15:16,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:16,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 07:15:16,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1789, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 07:15:16,219 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand 44 states. [2020-12-23 07:15:20,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:20,270 INFO L93 Difference]: Finished difference Result 872 states and 936 transitions. [2020-12-23 07:15:20,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 07:15:20,271 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 40 [2020-12-23 07:15:20,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:20,274 INFO L225 Difference]: With dead ends: 872 [2020-12-23 07:15:20,274 INFO L226 Difference]: Without dead ends: 863 [2020-12-23 07:15:20,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=327, Invalid=4929, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 07:15:20,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2020-12-23 07:15:20,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 491. [2020-12-23 07:15:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-12-23 07:15:20,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 545 transitions. [2020-12-23 07:15:20,420 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 545 transitions. Word has length 40 [2020-12-23 07:15:20,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:20,420 INFO L481 AbstractCegarLoop]: Abstraction has 491 states and 545 transitions. [2020-12-23 07:15:20,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 07:15:20,420 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 545 transitions. [2020-12-23 07:15:20,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 07:15:20,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:20,421 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:20,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:20,625 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:20,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:20,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1171113072, now seen corresponding path program 62 times [2020-12-23 07:15:20,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:20,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819287590] [2020-12-23 07:15:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:15:21,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819287590] [2020-12-23 07:15:21,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836047606] [2020-12-23 07:15:21,510 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:21,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:15:21,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:21,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 07:15:21,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:22,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:15:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:15:22,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:22,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 42 [2020-12-23 07:15:22,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539891569] [2020-12-23 07:15:22,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 07:15:22,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:22,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 07:15:22,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1620, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:15:22,633 INFO L87 Difference]: Start difference. First operand 491 states and 545 transitions. Second operand 42 states. [2020-12-23 07:15:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:25,942 INFO L93 Difference]: Finished difference Result 719 states and 772 transitions. [2020-12-23 07:15:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 07:15:25,943 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 40 [2020-12-23 07:15:25,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:25,945 INFO L225 Difference]: With dead ends: 719 [2020-12-23 07:15:25,945 INFO L226 Difference]: Without dead ends: 692 [2020-12-23 07:15:25,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=300, Invalid=4256, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 07:15:25,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2020-12-23 07:15:26,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 482. [2020-12-23 07:15:26,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2020-12-23 07:15:26,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2020-12-23 07:15:26,088 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 40 [2020-12-23 07:15:26,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:26,088 INFO L481 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2020-12-23 07:15:26,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 07:15:26,088 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2020-12-23 07:15:26,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 07:15:26,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:26,089 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:26,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-12-23 07:15:26,290 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:26,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:26,291 INFO L82 PathProgramCache]: Analyzing trace with hash 722054608, now seen corresponding path program 63 times [2020-12-23 07:15:26,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:26,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374902958] [2020-12-23 07:15:26,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 07:15:27,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374902958] [2020-12-23 07:15:27,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787147579] [2020-12-23 07:15:27,091 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:27,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:15:27,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:27,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 07:15:27,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:28,124 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:15:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 07:15:28,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:28,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 40 [2020-12-23 07:15:28,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063844668] [2020-12-23 07:15:28,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 07:15:28,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:28,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 07:15:28,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1459, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:15:28,189 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand 40 states. [2020-12-23 07:15:30,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:30,795 INFO L93 Difference]: Finished difference Result 617 states and 669 transitions. [2020-12-23 07:15:30,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 07:15:30,796 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2020-12-23 07:15:30,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:30,798 INFO L225 Difference]: With dead ends: 617 [2020-12-23 07:15:30,798 INFO L226 Difference]: Without dead ends: 589 [2020-12-23 07:15:30,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=294, Invalid=3738, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 07:15:30,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-12-23 07:15:30,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 471. [2020-12-23 07:15:30,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-12-23 07:15:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 523 transitions. [2020-12-23 07:15:30,940 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 523 transitions. Word has length 40 [2020-12-23 07:15:30,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:30,940 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 523 transitions. [2020-12-23 07:15:30,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 07:15:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 523 transitions. [2020-12-23 07:15:30,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 07:15:30,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:30,941 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:31,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:31,142 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:31,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:31,143 INFO L82 PathProgramCache]: Analyzing trace with hash -923927664, now seen corresponding path program 64 times [2020-12-23 07:15:31,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:31,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744354639] [2020-12-23 07:15:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 07:15:31,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744354639] [2020-12-23 07:15:31,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006942332] [2020-12-23 07:15:31,834 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:31,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:15:31,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:31,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 07:15:31,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:32,854 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:15:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 07:15:32,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:32,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 38 [2020-12-23 07:15:32,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263931897] [2020-12-23 07:15:32,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 07:15:32,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:32,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 07:15:32,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:15:32,915 INFO L87 Difference]: Start difference. First operand 471 states and 523 transitions. Second operand 38 states. [2020-12-23 07:15:35,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:35,146 INFO L93 Difference]: Finished difference Result 535 states and 586 transitions. [2020-12-23 07:15:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 07:15:35,147 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 40 [2020-12-23 07:15:35,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:35,150 INFO L225 Difference]: With dead ends: 535 [2020-12-23 07:15:35,150 INFO L226 Difference]: Without dead ends: 506 [2020-12-23 07:15:35,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=288, Invalid=3252, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:15:35,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-12-23 07:15:35,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 458. [2020-12-23 07:15:35,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-12-23 07:15:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 509 transitions. [2020-12-23 07:15:35,285 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 509 transitions. Word has length 40 [2020-12-23 07:15:35,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:35,285 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 509 transitions. [2020-12-23 07:15:35,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 07:15:35,285 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 509 transitions. [2020-12-23 07:15:35,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 07:15:35,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:35,286 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:35,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:35,486 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:35,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:35,487 INFO L82 PathProgramCache]: Analyzing trace with hash 137817552, now seen corresponding path program 65 times [2020-12-23 07:15:35,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:35,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6849753] [2020-12-23 07:15:35,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:35,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 07:15:36,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6849753] [2020-12-23 07:15:36,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686794254] [2020-12-23 07:15:36,088 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:36,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 07:15:36,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:36,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 07:15:36,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:37,043 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:15:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 07:15:37,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:37,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 36 [2020-12-23 07:15:37,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853605672] [2020-12-23 07:15:37,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 07:15:37,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:37,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 07:15:37,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1161, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:15:37,102 INFO L87 Difference]: Start difference. First operand 458 states and 509 transitions. Second operand 36 states. [2020-12-23 07:15:38,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:38,773 INFO L93 Difference]: Finished difference Result 504 states and 557 transitions. [2020-12-23 07:15:38,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:15:38,774 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-12-23 07:15:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:38,776 INFO L225 Difference]: With dead ends: 504 [2020-12-23 07:15:38,776 INFO L226 Difference]: Without dead ends: 498 [2020-12-23 07:15:38,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=282, Invalid=2798, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 07:15:38,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-12-23 07:15:38,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 471. [2020-12-23 07:15:38,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-12-23 07:15:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 524 transitions. [2020-12-23 07:15:38,919 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 524 transitions. Word has length 40 [2020-12-23 07:15:38,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:38,920 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 524 transitions. [2020-12-23 07:15:38,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 07:15:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 524 transitions. [2020-12-23 07:15:38,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:15:38,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:38,920 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:39,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-23 07:15:39,121 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:39,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:39,122 INFO L82 PathProgramCache]: Analyzing trace with hash -929146954, now seen corresponding path program 66 times [2020-12-23 07:15:39,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:39,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498453572] [2020-12-23 07:15:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:15:39,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498453572] [2020-12-23 07:15:39,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855985307] [2020-12-23 07:15:39,736 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:39,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 07:15:39,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:39,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:15:39,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:15:41,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:41,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2020-12-23 07:15:41,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527736592] [2020-12-23 07:15:41,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 07:15:41,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:41,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 07:15:41,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1703, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:15:41,353 INFO L87 Difference]: Start difference. First operand 471 states and 524 transitions. Second operand 43 states. [2020-12-23 07:15:50,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:50,773 INFO L93 Difference]: Finished difference Result 834 states and 902 transitions. [2020-12-23 07:15:50,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-23 07:15:50,774 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 41 [2020-12-23 07:15:50,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:50,777 INFO L225 Difference]: With dead ends: 834 [2020-12-23 07:15:50,777 INFO L226 Difference]: Without dead ends: 790 [2020-12-23 07:15:50,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3195 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=2745, Invalid=12261, Unknown=0, NotChecked=0, Total=15006 [2020-12-23 07:15:50,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2020-12-23 07:15:50,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 519. [2020-12-23 07:15:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2020-12-23 07:15:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 577 transitions. [2020-12-23 07:15:50,935 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 577 transitions. Word has length 41 [2020-12-23 07:15:50,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:50,935 INFO L481 AbstractCegarLoop]: Abstraction has 519 states and 577 transitions. [2020-12-23 07:15:50,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 07:15:50,935 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 577 transitions. [2020-12-23 07:15:50,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:15:50,936 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:50,936 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:51,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:51,137 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:51,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:51,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1535117609, now seen corresponding path program 67 times [2020-12-23 07:15:51,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:51,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749894248] [2020-12-23 07:15:51,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:15:51,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749894248] [2020-12-23 07:15:51,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128801721] [2020-12-23 07:15:51,871 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:51,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:15:51,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:15:53,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:53,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 44 [2020-12-23 07:15:53,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10856120] [2020-12-23 07:15:53,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 07:15:53,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:53,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 07:15:53,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 07:15:53,633 INFO L87 Difference]: Start difference. First operand 519 states and 577 transitions. Second operand 44 states. [2020-12-23 07:15:57,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:57,218 INFO L93 Difference]: Finished difference Result 817 states and 880 transitions. [2020-12-23 07:15:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:15:57,219 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 41 [2020-12-23 07:15:57,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:57,222 INFO L225 Difference]: With dead ends: 817 [2020-12-23 07:15:57,222 INFO L226 Difference]: Without dead ends: 795 [2020-12-23 07:15:57,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=243, Invalid=2727, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:15:57,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2020-12-23 07:15:57,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 524. [2020-12-23 07:15:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-12-23 07:15:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 582 transitions. [2020-12-23 07:15:57,388 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 582 transitions. Word has length 41 [2020-12-23 07:15:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:57,388 INFO L481 AbstractCegarLoop]: Abstraction has 524 states and 582 transitions. [2020-12-23 07:15:57,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 07:15:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 582 transitions. [2020-12-23 07:15:57,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:15:57,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:57,389 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:57,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-12-23 07:15:57,590 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:57,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:57,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1578640213, now seen corresponding path program 68 times [2020-12-23 07:15:57,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:57,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820950323] [2020-12-23 07:15:57,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 07:15:57,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820950323] [2020-12-23 07:15:57,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814887846] [2020-12-23 07:15:57,773 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:57,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:15:57,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:57,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:15:57,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 07:15:58,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:58,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2020-12-23 07:15:58,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013474250] [2020-12-23 07:15:58,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:15:58,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:58,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:15:58,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:15:58,106 INFO L87 Difference]: Start difference. First operand 524 states and 582 transitions. Second operand 21 states. [2020-12-23 07:15:58,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:58,925 INFO L93 Difference]: Finished difference Result 618 states and 684 transitions. [2020-12-23 07:15:58,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:15:58,926 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-12-23 07:15:58,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:58,928 INFO L225 Difference]: With dead ends: 618 [2020-12-23 07:15:58,928 INFO L226 Difference]: Without dead ends: 602 [2020-12-23 07:15:58,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:15:58,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-12-23 07:15:59,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 558. [2020-12-23 07:15:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-12-23 07:15:59,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 627 transitions. [2020-12-23 07:15:59,100 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 627 transitions. Word has length 41 [2020-12-23 07:15:59,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:59,100 INFO L481 AbstractCegarLoop]: Abstraction has 558 states and 627 transitions. [2020-12-23 07:15:59,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:15:59,100 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 627 transitions. [2020-12-23 07:15:59,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:15:59,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:59,101 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:59,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-23 07:15:59,302 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:59,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:59,303 INFO L82 PathProgramCache]: Analyzing trace with hash 888112408, now seen corresponding path program 69 times [2020-12-23 07:15:59,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:59,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981963511] [2020-12-23 07:15:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 07:15:59,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981963511] [2020-12-23 07:15:59,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085078292] [2020-12-23 07:15:59,471 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:59,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:15:59,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:59,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:15:59,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 07:15:59,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:15:59,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2020-12-23 07:15:59,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355260733] [2020-12-23 07:15:59,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:15:59,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:59,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:15:59,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:15:59,820 INFO L87 Difference]: Start difference. First operand 558 states and 627 transitions. Second operand 21 states. [2020-12-23 07:16:00,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:00,736 INFO L93 Difference]: Finished difference Result 996 states and 1135 transitions. [2020-12-23 07:16:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:16:00,737 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-12-23 07:16:00,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:00,740 INFO L225 Difference]: With dead ends: 996 [2020-12-23 07:16:00,740 INFO L226 Difference]: Without dead ends: 834 [2020-12-23 07:16:00,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:16:00,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2020-12-23 07:16:00,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 640. [2020-12-23 07:16:00,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2020-12-23 07:16:00,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2020-12-23 07:16:00,945 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 41 [2020-12-23 07:16:00,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:00,945 INFO L481 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2020-12-23 07:16:00,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:16:00,945 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2020-12-23 07:16:00,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:16:00,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:00,946 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:01,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-23 07:16:01,147 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:01,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:01,148 INFO L82 PathProgramCache]: Analyzing trace with hash 318631823, now seen corresponding path program 70 times [2020-12-23 07:16:01,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:01,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544997072] [2020-12-23 07:16:01,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:16:02,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544997072] [2020-12-23 07:16:02,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774478333] [2020-12-23 07:16:02,452 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:02,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:16:02,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:16:02,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 07:16:02,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:03,833 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:16:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:16:03,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:16:03,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 47 [2020-12-23 07:16:03,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172396772] [2020-12-23 07:16:03,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 07:16:03,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:03,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 07:16:03,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2052, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 07:16:03,918 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand 47 states. [2020-12-23 07:16:08,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:08,990 INFO L93 Difference]: Finished difference Result 1165 states and 1259 transitions. [2020-12-23 07:16:08,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 07:16:08,991 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 42 [2020-12-23 07:16:08,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:08,995 INFO L225 Difference]: With dead ends: 1165 [2020-12-23 07:16:08,996 INFO L226 Difference]: Without dead ends: 1156 [2020-12-23 07:16:08,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=346, Invalid=5660, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 07:16:08,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2020-12-23 07:16:09,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 649. [2020-12-23 07:16:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-12-23 07:16:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 730 transitions. [2020-12-23 07:16:09,206 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 730 transitions. Word has length 42 [2020-12-23 07:16:09,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:09,206 INFO L481 AbstractCegarLoop]: Abstraction has 649 states and 730 transitions. [2020-12-23 07:16:09,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 07:16:09,206 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 730 transitions. [2020-12-23 07:16:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:16:09,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:09,207 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:09,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:09,408 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:09,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:09,409 INFO L82 PathProgramCache]: Analyzing trace with hash -225136977, now seen corresponding path program 71 times [2020-12-23 07:16:09,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:09,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271786976] [2020-12-23 07:16:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:16:10,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271786976] [2020-12-23 07:16:10,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665317585] [2020-12-23 07:16:10,611 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:10,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 07:16:10,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:16:10,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 07:16:10,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:12,000 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:16:12,083 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:16:12,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:16:12,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 45 [2020-12-23 07:16:12,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148817606] [2020-12-23 07:16:12,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 07:16:12,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:12,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 07:16:12,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1871, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:16:12,084 INFO L87 Difference]: Start difference. First operand 649 states and 730 transitions. Second operand 45 states. [2020-12-23 07:16:16,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:16,702 INFO L93 Difference]: Finished difference Result 983 states and 1063 transitions. [2020-12-23 07:16:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 07:16:16,703 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 42 [2020-12-23 07:16:16,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:16,706 INFO L225 Difference]: With dead ends: 983 [2020-12-23 07:16:16,706 INFO L226 Difference]: Without dead ends: 955 [2020-12-23 07:16:16,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=318, Invalid=4938, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 07:16:16,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2020-12-23 07:16:16,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 640. [2020-12-23 07:16:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2020-12-23 07:16:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2020-12-23 07:16:16,928 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 42 [2020-12-23 07:16:16,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:16,928 INFO L481 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2020-12-23 07:16:16,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 07:16:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2020-12-23 07:16:16,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:16:16,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:16,929 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:17,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:17,130 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:17,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:17,130 INFO L82 PathProgramCache]: Analyzing trace with hash -284040433, now seen corresponding path program 72 times [2020-12-23 07:16:17,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:17,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165802037] [2020-12-23 07:16:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 07:16:18,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165802037] [2020-12-23 07:16:18,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290450649] [2020-12-23 07:16:18,203 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:18,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 07:16:18,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:16:18,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 07:16:18,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:19,586 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:16:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 07:16:19,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:16:19,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 43 [2020-12-23 07:16:19,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088994256] [2020-12-23 07:16:19,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 07:16:19,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:19,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 07:16:19,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1698, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:16:19,668 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand 43 states. [2020-12-23 07:16:23,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:23,341 INFO L93 Difference]: Finished difference Result 853 states and 932 transitions. [2020-12-23 07:16:23,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 07:16:23,342 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2020-12-23 07:16:23,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:23,345 INFO L225 Difference]: With dead ends: 853 [2020-12-23 07:16:23,345 INFO L226 Difference]: Without dead ends: 824 [2020-12-23 07:16:23,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=312, Invalid=4380, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:16:23,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2020-12-23 07:16:23,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 629. [2020-12-23 07:16:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2020-12-23 07:16:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 708 transitions. [2020-12-23 07:16:23,567 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 708 transitions. Word has length 42 [2020-12-23 07:16:23,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:23,567 INFO L481 AbstractCegarLoop]: Abstraction has 629 states and 708 transitions. [2020-12-23 07:16:23,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 07:16:23,567 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 708 transitions. [2020-12-23 07:16:23,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:16:23,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:23,568 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:23,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:23,769 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:23,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:23,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2122368209, now seen corresponding path program 73 times [2020-12-23 07:16:23,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:23,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133167310] [2020-12-23 07:16:23,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 07:16:24,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133167310] [2020-12-23 07:16:24,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398916381] [2020-12-23 07:16:24,729 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:24,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 07:16:24,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:26,102 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:16:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 07:16:26,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:16:26,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 41 [2020-12-23 07:16:26,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183096872] [2020-12-23 07:16:26,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 07:16:26,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:26,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 07:16:26,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1533, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:16:26,181 INFO L87 Difference]: Start difference. First operand 629 states and 708 transitions. Second operand 41 states. [2020-12-23 07:16:29,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:29,432 INFO L93 Difference]: Finished difference Result 754 states and 832 transitions. [2020-12-23 07:16:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 07:16:29,434 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 42 [2020-12-23 07:16:29,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:29,437 INFO L225 Difference]: With dead ends: 754 [2020-12-23 07:16:29,437 INFO L226 Difference]: Without dead ends: 724 [2020-12-23 07:16:29,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=306, Invalid=3854, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 07:16:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2020-12-23 07:16:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 616. [2020-12-23 07:16:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2020-12-23 07:16:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 694 transitions. [2020-12-23 07:16:29,654 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 694 transitions. Word has length 42 [2020-12-23 07:16:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:29,654 INFO L481 AbstractCegarLoop]: Abstraction has 616 states and 694 transitions. [2020-12-23 07:16:29,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 07:16:29,655 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 694 transitions. [2020-12-23 07:16:29,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:16:29,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:29,655 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:29,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:29,863 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:29,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:29,864 INFO L82 PathProgramCache]: Analyzing trace with hash -147720610, now seen corresponding path program 74 times [2020-12-23 07:16:29,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:29,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336515745] [2020-12-23 07:16:29,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:16:30,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336515745] [2020-12-23 07:16:30,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960408598] [2020-12-23 07:16:30,245 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:30,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:16:30,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:16:30,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:16:30,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 07:16:31,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:16:31,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2020-12-23 07:16:31,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728041812] [2020-12-23 07:16:31,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 07:16:31,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:31,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 07:16:31,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:16:31,097 INFO L87 Difference]: Start difference. First operand 616 states and 694 transitions. Second operand 28 states. [2020-12-23 07:16:34,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:34,490 INFO L93 Difference]: Finished difference Result 816 states and 910 transitions. [2020-12-23 07:16:34,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 07:16:34,492 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 42 [2020-12-23 07:16:34,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:34,496 INFO L225 Difference]: With dead ends: 816 [2020-12-23 07:16:34,496 INFO L226 Difference]: Without dead ends: 753 [2020-12-23 07:16:34,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=748, Invalid=3034, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 07:16:34,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2020-12-23 07:16:34,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 681. [2020-12-23 07:16:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2020-12-23 07:16:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 758 transitions. [2020-12-23 07:16:34,732 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 758 transitions. Word has length 42 [2020-12-23 07:16:34,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:34,732 INFO L481 AbstractCegarLoop]: Abstraction has 681 states and 758 transitions. [2020-12-23 07:16:34,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 07:16:34,732 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 758 transitions. [2020-12-23 07:16:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:16:34,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:34,733 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:34,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-12-23 07:16:34,934 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:34,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:34,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1018615439, now seen corresponding path program 75 times [2020-12-23 07:16:34,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:34,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835556165] [2020-12-23 07:16:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 07:16:35,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835556165] [2020-12-23 07:16:35,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559063965] [2020-12-23 07:16:35,823 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:35,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:16:35,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:16:35,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 07:16:35,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:37,159 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:16:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 07:16:37,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:16:37,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 39 [2020-12-23 07:16:37,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312308371] [2020-12-23 07:16:37,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 07:16:37,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:37,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 07:16:37,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:16:37,236 INFO L87 Difference]: Start difference. First operand 681 states and 758 transitions. Second operand 39 states. [2020-12-23 07:16:39,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:39,971 INFO L93 Difference]: Finished difference Result 774 states and 854 transitions. [2020-12-23 07:16:39,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 07:16:39,973 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-12-23 07:16:39,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:39,976 INFO L225 Difference]: With dead ends: 774 [2020-12-23 07:16:39,977 INFO L226 Difference]: Without dead ends: 743 [2020-12-23 07:16:39,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=300, Invalid=3360, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 07:16:39,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2020-12-23 07:16:40,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 677. [2020-12-23 07:16:40,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2020-12-23 07:16:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 755 transitions. [2020-12-23 07:16:40,233 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 755 transitions. Word has length 42 [2020-12-23 07:16:40,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:40,233 INFO L481 AbstractCegarLoop]: Abstraction has 677 states and 755 transitions. [2020-12-23 07:16:40,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 07:16:40,234 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 755 transitions. [2020-12-23 07:16:40,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:16:40,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:40,235 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:40,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:40,436 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:40,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:40,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1114544290, now seen corresponding path program 76 times [2020-12-23 07:16:40,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:40,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326094328] [2020-12-23 07:16:40,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:16:40,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326094328] [2020-12-23 07:16:40,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686051148] [2020-12-23 07:16:40,863 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:40,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:16:40,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:16:40,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:16:40,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 07:16:41,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:16:41,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2020-12-23 07:16:41,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673481775] [2020-12-23 07:16:41,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 07:16:41,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:41,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 07:16:41,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:16:41,802 INFO L87 Difference]: Start difference. First operand 677 states and 755 transitions. Second operand 29 states. [2020-12-23 07:16:43,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:16:43,648 INFO L93 Difference]: Finished difference Result 755 states and 828 transitions. [2020-12-23 07:16:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:16:43,653 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 42 [2020-12-23 07:16:43,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:16:43,655 INFO L225 Difference]: With dead ends: 755 [2020-12-23 07:16:43,655 INFO L226 Difference]: Without dead ends: 721 [2020-12-23 07:16:43,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:16:43,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2020-12-23 07:16:43,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 677. [2020-12-23 07:16:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2020-12-23 07:16:43,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 745 transitions. [2020-12-23 07:16:43,905 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 745 transitions. Word has length 42 [2020-12-23 07:16:43,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:16:43,905 INFO L481 AbstractCegarLoop]: Abstraction has 677 states and 745 transitions. [2020-12-23 07:16:43,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 07:16:43,905 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 745 transitions. [2020-12-23 07:16:43,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 07:16:43,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:16:43,906 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:16:44,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:44,121 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:16:44,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:16:44,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1950289367, now seen corresponding path program 77 times [2020-12-23 07:16:44,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:16:44,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78640056] [2020-12-23 07:16:44,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:16:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:16:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:16:45,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78640056] [2020-12-23 07:16:45,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508291205] [2020-12-23 07:16:45,115 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:16:45,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 07:16:45,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:16:45,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:16:45,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:16:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:16:47,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:16:47,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2020-12-23 07:16:47,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700352317] [2020-12-23 07:16:47,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 07:16:47,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:16:47,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 07:16:47,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 07:16:47,436 INFO L87 Difference]: Start difference. First operand 677 states and 745 transitions. Second operand 47 states. [2020-12-23 07:16:54,914 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 25 [2020-12-23 07:16:57,727 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 28 [2020-12-23 07:16:58,099 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 28 [2020-12-23 07:16:59,011 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 28 [2020-12-23 07:16:59,785 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2020-12-23 07:17:00,382 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 28 [2020-12-23 07:17:01,027 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 28 [2020-12-23 07:17:01,285 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 28 [2020-12-23 07:17:01,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:01,737 INFO L93 Difference]: Finished difference Result 1173 states and 1259 transitions. [2020-12-23 07:17:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-12-23 07:17:01,739 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 43 [2020-12-23 07:17:01,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:01,741 INFO L225 Difference]: With dead ends: 1173 [2020-12-23 07:17:01,741 INFO L226 Difference]: Without dead ends: 1125 [2020-12-23 07:17:01,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4369 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=3576, Invalid=16164, Unknown=0, NotChecked=0, Total=19740 [2020-12-23 07:17:01,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2020-12-23 07:17:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 743. [2020-12-23 07:17:02,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-12-23 07:17:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 817 transitions. [2020-12-23 07:17:02,023 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 817 transitions. Word has length 43 [2020-12-23 07:17:02,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:02,024 INFO L481 AbstractCegarLoop]: Abstraction has 743 states and 817 transitions. [2020-12-23 07:17:02,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 07:17:02,024 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 817 transitions. [2020-12-23 07:17:02,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 07:17:02,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:02,025 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:02,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:02,241 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:02,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:02,241 INFO L82 PathProgramCache]: Analyzing trace with hash 345068246, now seen corresponding path program 78 times [2020-12-23 07:17:02,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:02,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884679754] [2020-12-23 07:17:02,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:17:03,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884679754] [2020-12-23 07:17:03,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733368868] [2020-12-23 07:17:03,292 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:03,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 07:17:03,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:03,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:17:03,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:17:05,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:05,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 48 [2020-12-23 07:17:05,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358907361] [2020-12-23 07:17:05,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 07:17:05,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:05,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 07:17:05,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:17:05,976 INFO L87 Difference]: Start difference. First operand 743 states and 817 transitions. Second operand 48 states. [2020-12-23 07:17:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:10,765 INFO L93 Difference]: Finished difference Result 1155 states and 1235 transitions. [2020-12-23 07:17:10,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:17:10,767 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 43 [2020-12-23 07:17:10,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:10,769 INFO L225 Difference]: With dead ends: 1155 [2020-12-23 07:17:10,769 INFO L226 Difference]: Without dead ends: 1131 [2020-12-23 07:17:10,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=272, Invalid=3268, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:17:10,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2020-12-23 07:17:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 749. [2020-12-23 07:17:11,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-12-23 07:17:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 823 transitions. [2020-12-23 07:17:11,044 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 823 transitions. Word has length 43 [2020-12-23 07:17:11,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:11,045 INFO L481 AbstractCegarLoop]: Abstraction has 749 states and 823 transitions. [2020-12-23 07:17:11,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 07:17:11,045 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 823 transitions. [2020-12-23 07:17:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 07:17:11,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:11,046 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:11,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:11,247 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:11,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:11,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1718266860, now seen corresponding path program 79 times [2020-12-23 07:17:11,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:11,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956279233] [2020-12-23 07:17:11,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-23 07:17:11,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956279233] [2020-12-23 07:17:11,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233378470] [2020-12-23 07:17:11,517 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:11,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:17:11,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-23 07:17:11,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:11,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2020-12-23 07:17:11,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815431271] [2020-12-23 07:17:11,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:17:11,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:11,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:17:11,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:17:11,965 INFO L87 Difference]: Start difference. First operand 749 states and 823 transitions. Second operand 22 states. [2020-12-23 07:17:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:13,021 INFO L93 Difference]: Finished difference Result 919 states and 1007 transitions. [2020-12-23 07:17:13,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:17:13,023 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2020-12-23 07:17:13,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:13,025 INFO L225 Difference]: With dead ends: 919 [2020-12-23 07:17:13,025 INFO L226 Difference]: Without dead ends: 779 [2020-12-23 07:17:13,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=478, Invalid=854, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:17:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-12-23 07:17:13,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 735. [2020-12-23 07:17:13,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2020-12-23 07:17:13,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 805 transitions. [2020-12-23 07:17:13,288 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 805 transitions. Word has length 43 [2020-12-23 07:17:13,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:13,289 INFO L481 AbstractCegarLoop]: Abstraction has 735 states and 805 transitions. [2020-12-23 07:17:13,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:17:13,289 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 805 transitions. [2020-12-23 07:17:13,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 07:17:13,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:13,290 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:13,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-12-23 07:17:13,490 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:13,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:13,491 INFO L82 PathProgramCache]: Analyzing trace with hash -2059418347, now seen corresponding path program 80 times [2020-12-23 07:17:13,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:13,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036572970] [2020-12-23 07:17:13,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-23 07:17:13,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036572970] [2020-12-23 07:17:13,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124794505] [2020-12-23 07:17:13,749 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:13,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:17:13,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:13,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:17:13,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-23 07:17:14,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:17:14,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2020-12-23 07:17:14,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786860101] [2020-12-23 07:17:14,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:17:14,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:14,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:17:14,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:17:14,194 INFO L87 Difference]: Start difference. First operand 735 states and 805 transitions. Second operand 22 states. [2020-12-23 07:17:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:15,253 INFO L93 Difference]: Finished difference Result 786 states and 851 transitions. [2020-12-23 07:17:15,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:17:15,255 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2020-12-23 07:17:15,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:15,256 INFO L225 Difference]: With dead ends: 786 [2020-12-23 07:17:15,256 INFO L226 Difference]: Without dead ends: 780 [2020-12-23 07:17:15,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=478, Invalid=854, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:17:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-12-23 07:17:15,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 736. [2020-12-23 07:17:15,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-12-23 07:17:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 806 transitions. [2020-12-23 07:17:15,526 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 806 transitions. Word has length 43 [2020-12-23 07:17:15,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:15,526 INFO L481 AbstractCegarLoop]: Abstraction has 736 states and 806 transitions. [2020-12-23 07:17:15,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:17:15,526 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 806 transitions. [2020-12-23 07:17:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 07:17:15,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:15,527 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:15,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-12-23 07:17:15,728 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:15,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:15,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1525148816, now seen corresponding path program 81 times [2020-12-23 07:17:15,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:15,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060614192] [2020-12-23 07:17:15,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:17:17,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060614192] [2020-12-23 07:17:17,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767495238] [2020-12-23 07:17:17,592 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:17,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 07:17:17,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:17,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 07:17:17,674 INFO L286 TraceCheckSpWp]: Computing forward predicates...