/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-178dd20 [2021-01-06 17:07:24,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:07:24,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:07:24,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:07:24,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:07:24,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:07:24,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:07:24,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:07:24,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:07:24,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:07:24,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:07:24,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:07:24,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:07:24,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:07:24,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:07:24,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:07:24,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:07:24,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:07:24,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:07:24,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:07:24,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:07:24,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:07:24,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:07:24,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:07:24,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:07:24,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:07:24,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:07:24,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:07:24,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:07:24,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:07:24,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:07:24,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:07:24,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:07:24,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:07:24,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:07:24,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:07:24,560 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:07:24,586 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:07:24,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:07:24,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:07:24,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:07:24,589 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:07:24,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:07:24,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:07:24,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:07:24,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:07:24,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:07:24,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:07:24,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:07:24,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:07:24,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:07:24,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:07:24,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:07:24,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:07:24,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:07:24,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:07:24,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:07:24,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:07:24,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:07:24,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:07:24,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:07:24,593 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:07:24,594 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:07:24,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:07:24,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:07:24,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:07:24,989 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:07:24,990 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:07:24,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2021-01-06 17:07:25,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cf0d0010f/1dfaa35f409a4b5da310b797d2a5f543/FLAG7cf2eecf6 [2021-01-06 17:07:25,593 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:07:25,594 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2021-01-06 17:07:25,606 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cf0d0010f/1dfaa35f409a4b5da310b797d2a5f543/FLAG7cf2eecf6 [2021-01-06 17:07:25,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cf0d0010f/1dfaa35f409a4b5da310b797d2a5f543 [2021-01-06 17:07:25,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:07:25,969 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:07:25,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:07:25,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:07:25,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:07:25,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:07:25" (1/1) ... [2021-01-06 17:07:25,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@457e0b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:07:25, skipping insertion in model container [2021-01-06 17:07:25,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:07:25" (1/1) ... [2021-01-06 17:07:25,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:07:26,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:07:26,235 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,] [2021-01-06 17:07:26,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:07:26,301 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:07:26,315 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,] [2021-01-06 17:07:26,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:07:26,344 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:07:26,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:07:26 WrapperNode [2021-01-06 17:07:26,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:07:26,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:07:26,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:07:26,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:07:26,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:07:26" (1/1) ... [2021-01-06 17:07:26,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:07:26" (1/1) ... [2021-01-06 17:07:26,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:07:26,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:07:26,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:07:26,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:07:26,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:07:26" (1/1) ... [2021-01-06 17:07:26,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:07:26" (1/1) ... [2021-01-06 17:07:26,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:07:26" (1/1) ... [2021-01-06 17:07:26,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:07:26" (1/1) ... [2021-01-06 17:07:26,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:07:26" (1/1) ... [2021-01-06 17:07:26,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:07:26" (1/1) ... [2021-01-06 17:07:26,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:07:26" (1/1) ... [2021-01-06 17:07:26,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:07:26,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:07:26,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:07:26,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:07:26,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:07:26" (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 [2021-01-06 17:07:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:07:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:07:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:07:26,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:07:26,901 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:07:26,901 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-01-06 17:07:26,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:07:26 BoogieIcfgContainer [2021-01-06 17:07:26,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:07:26,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:07:26,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:07:26,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:07:26,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:07:25" (1/3) ... [2021-01-06 17:07:26,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c658b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:07:26, skipping insertion in model container [2021-01-06 17:07:26,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:07:26" (2/3) ... [2021-01-06 17:07:26,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c658b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:07:26, skipping insertion in model container [2021-01-06 17:07:26,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:07:26" (3/3) ... [2021-01-06 17:07:26,911 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2021-01-06 17:07:26,921 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:07:26,932 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 17:07:26,991 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 17:07:27,048 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:07:27,049 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:07:27,049 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:07:27,049 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:07:27,049 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:07:27,049 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:07:27,050 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:07:27,050 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:07:27,068 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-01-06 17:07:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 17:07:27,073 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:27,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 17:07:27,074 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:27,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:27,081 INFO L82 PathProgramCache]: Analyzing trace with hash 891969447, now seen corresponding path program 1 times [2021-01-06 17:07:27,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:27,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541485470] [2021-01-06 17:07:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:07:27,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541485470] [2021-01-06 17:07:27,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:07:27,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 17:07:27,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900628070] [2021-01-06 17:07:27,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:07:27,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:27,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:07:27,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:07:27,323 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 4 states. [2021-01-06 17:07:27,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:27,380 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2021-01-06 17:07:27,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:07:27,382 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-06 17:07:27,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:27,391 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:07:27,392 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 17:07:27,395 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 [2021-01-06 17:07:27,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 17:07:27,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 17:07:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 17:07:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-01-06 17:07:27,436 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 6 [2021-01-06 17:07:27,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:27,437 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-01-06 17:07:27,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:07:27,437 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-01-06 17:07:27,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:07:27,438 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:27,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:27,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:07:27,440 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:27,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:27,443 INFO L82 PathProgramCache]: Analyzing trace with hash 535820783, now seen corresponding path program 1 times [2021-01-06 17:07:27,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:27,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971675824] [2021-01-06 17:07:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:07:27,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971675824] [2021-01-06 17:07:27,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:07:27,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-06 17:07:27,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782981616] [2021-01-06 17:07:27,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:07:27,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:27,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:07:27,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:07:27,643 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 9 states. [2021-01-06 17:07:27,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:27,826 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-01-06 17:07:27,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:07:27,826 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2021-01-06 17:07:27,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:27,828 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:07:27,828 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 17:07:27,829 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 [2021-01-06 17:07:27,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 17:07:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2021-01-06 17:07:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 17:07:27,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2021-01-06 17:07:27,837 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 18 [2021-01-06 17:07:27,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:27,838 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2021-01-06 17:07:27,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:07:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2021-01-06 17:07:27,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:07:27,839 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:27,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:27,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 17:07:27,840 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:27,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:27,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1031838486, now seen corresponding path program 1 times [2021-01-06 17:07:27,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:27,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963903173] [2021-01-06 17:07:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:07:27,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963903173] [2021-01-06 17:07:27,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:07:27,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 17:07:27,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716899612] [2021-01-06 17:07:27,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:07:27,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:27,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:07:27,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:07:27,926 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 4 states. [2021-01-06 17:07:27,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:27,953 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-01-06 17:07:27,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:07:27,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-01-06 17:07:27,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:27,958 INFO L225 Difference]: With dead ends: 47 [2021-01-06 17:07:27,959 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 17:07:27,960 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 [2021-01-06 17:07:27,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 17:07:27,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2021-01-06 17:07:27,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:07:27,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-01-06 17:07:27,974 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 19 [2021-01-06 17:07:27,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:27,974 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-01-06 17:07:27,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:07:27,975 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-01-06 17:07:27,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:07:27,978 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:27,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:27,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 17:07:27,978 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:27,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:27,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1782670069, now seen corresponding path program 1 times [2021-01-06 17:07:27,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:27,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240095393] [2021-01-06 17:07:27,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:07:28,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240095393] [2021-01-06 17:07:28,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:07:28,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 17:07:28,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573315988] [2021-01-06 17:07:28,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:07:28,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:28,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:07:28,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:07:28,097 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand 4 states. [2021-01-06 17:07:28,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:28,128 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2021-01-06 17:07:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:07:28,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-01-06 17:07:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:28,134 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:07:28,134 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 17:07:28,135 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 [2021-01-06 17:07:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 17:07:28,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-01-06 17:07:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:07:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2021-01-06 17:07:28,149 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 19 [2021-01-06 17:07:28,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:28,150 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2021-01-06 17:07:28,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:07:28,150 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2021-01-06 17:07:28,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:07:28,151 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:28,155 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] [2021-01-06 17:07:28,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 17:07:28,156 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:28,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:28,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1545632287, now seen corresponding path program 1 times [2021-01-06 17:07:28,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:28,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199536340] [2021-01-06 17:07:28,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:07:28,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199536340] [2021-01-06 17:07:28,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:07:28,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:07:28,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996012323] [2021-01-06 17:07:28,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:07:28,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:28,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:07:28,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:07:28,269 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand 3 states. [2021-01-06 17:07:28,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:28,297 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-01-06 17:07:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:07:28,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2021-01-06 17:07:28,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:28,298 INFO L225 Difference]: With dead ends: 49 [2021-01-06 17:07:28,298 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 17:07:28,299 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 [2021-01-06 17:07:28,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 17:07:28,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 17:07:28,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 17:07:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-01-06 17:07:28,311 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 20 [2021-01-06 17:07:28,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:28,311 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-01-06 17:07:28,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:07:28,312 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-01-06 17:07:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:07:28,312 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:28,312 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] [2021-01-06 17:07:28,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 17:07:28,313 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:28,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:28,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1312537087, now seen corresponding path program 1 times [2021-01-06 17:07:28,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:28,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027748914] [2021-01-06 17:07:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:07:28,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027748914] [2021-01-06 17:07:28,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:07:28,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:07:28,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525789391] [2021-01-06 17:07:28,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:07:28,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:28,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:07:28,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:07:28,370 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 3 states. [2021-01-06 17:07:28,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:28,383 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2021-01-06 17:07:28,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:07:28,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2021-01-06 17:07:28,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:28,385 INFO L225 Difference]: With dead ends: 59 [2021-01-06 17:07:28,385 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 17:07:28,386 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 [2021-01-06 17:07:28,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 17:07:28,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 17:07:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:07:28,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-01-06 17:07:28,392 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 20 [2021-01-06 17:07:28,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:28,392 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-01-06 17:07:28,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:07:28,392 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-01-06 17:07:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 17:07:28,393 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:28,393 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] [2021-01-06 17:07:28,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 17:07:28,394 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:28,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:28,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1130312570, now seen corresponding path program 1 times [2021-01-06 17:07:28,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:28,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526975222] [2021-01-06 17:07:28,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:07:28,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526975222] [2021-01-06 17:07:28,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:07:28,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 17:07:28,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766858904] [2021-01-06 17:07:28,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:07:28,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:28,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:07:28,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:07:28,502 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 4 states. [2021-01-06 17:07:28,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:28,533 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-01-06 17:07:28,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:07:28,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-01-06 17:07:28,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:28,535 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:07:28,535 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:07:28,536 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 [2021-01-06 17:07:28,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:07:28,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 17:07:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:07:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-01-06 17:07:28,542 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 21 [2021-01-06 17:07:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:28,542 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-01-06 17:07:28,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:07:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-01-06 17:07:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:07:28,543 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:28,543 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] [2021-01-06 17:07:28,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-06 17:07:28,544 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:28,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:28,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1437483694, now seen corresponding path program 1 times [2021-01-06 17:07:28,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:28,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023649647] [2021-01-06 17:07:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:07:28,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023649647] [2021-01-06 17:07:28,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087815263] [2021-01-06 17:07:28,598 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 [2021-01-06 17:07:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:28,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 17:07:28,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:07:28,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:07:28,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-01-06 17:07:28,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578055675] [2021-01-06 17:07:28,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:07:28,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:28,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:07:28,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:07:28,771 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 5 states. [2021-01-06 17:07:28,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:28,814 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-01-06 17:07:28,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:07:28,815 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2021-01-06 17:07:28,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:28,817 INFO L225 Difference]: With dead ends: 37 [2021-01-06 17:07:28,817 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 17:07:28,818 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 [2021-01-06 17:07:28,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 17:07:28,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 17:07:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:07:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-01-06 17:07:28,833 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 22 [2021-01-06 17:07:28,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:28,834 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-01-06 17:07:28,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:07:28,834 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-01-06 17:07:28,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:07:28,835 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:28,835 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] [2021-01-06 17:07:29,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-06 17:07:29,050 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:29,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:29,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1965889039, now seen corresponding path program 1 times [2021-01-06 17:07:29,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:29,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982830906] [2021-01-06 17:07:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:07:29,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982830906] [2021-01-06 17:07:29,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088701855] [2021-01-06 17:07:29,191 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 [2021-01-06 17:07:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:29,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:07:29,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:29,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:07:29,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-01-06 17:07:29,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813104012] [2021-01-06 17:07:29,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:07:29,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:29,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:07:29,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:07:29,344 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 4 states. [2021-01-06 17:07:29,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:29,370 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-01-06 17:07:29,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:07:29,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-01-06 17:07:29,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:29,372 INFO L225 Difference]: With dead ends: 32 [2021-01-06 17:07:29,372 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 17:07:29,372 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 [2021-01-06 17:07:29,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 17:07:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 17:07:29,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 17:07:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-01-06 17:07:29,383 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 22 [2021-01-06 17:07:29,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:29,385 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-01-06 17:07:29,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:07:29,386 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-01-06 17:07:29,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 17:07:29,389 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:29,389 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] [2021-01-06 17:07:29,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:29,607 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:29,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:29,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1829813877, now seen corresponding path program 1 times [2021-01-06 17:07:29,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:29,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843466555] [2021-01-06 17:07:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:29,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843466555] [2021-01-06 17:07:29,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755720398] [2021-01-06 17:07:29,711 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 [2021-01-06 17:07:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:29,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 17:07:29,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:29,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:07:29,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-01-06 17:07:29,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495303190] [2021-01-06 17:07:29,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:07:29,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:29,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:07:29,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:07:29,834 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 5 states. [2021-01-06 17:07:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:29,851 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-01-06 17:07:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:07:29,851 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2021-01-06 17:07:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:29,852 INFO L225 Difference]: With dead ends: 31 [2021-01-06 17:07:29,852 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 17:07:29,853 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 [2021-01-06 17:07:29,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 17:07:29,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 17:07:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:07:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-01-06 17:07:29,857 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 23 [2021-01-06 17:07:29,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:29,857 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-01-06 17:07:29,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:07:29,857 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-01-06 17:07:29,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 17:07:29,858 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:29,858 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] [2021-01-06 17:07:30,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 17:07:30,072 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:30,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1804048560, now seen corresponding path program 1 times [2021-01-06 17:07:30,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:30,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401323979] [2021-01-06 17:07:30,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:07:30,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401323979] [2021-01-06 17:07:30,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580889715] [2021-01-06 17:07:30,263 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 [2021-01-06 17:07:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:30,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 17:07:30,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:30,534 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:07:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:07:30,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:30,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-01-06 17:07:30,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179826361] [2021-01-06 17:07:30,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:07:30,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:30,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:07:30,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:07:30,562 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 20 states. [2021-01-06 17:07:31,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:31,021 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2021-01-06 17:07:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:07:31,022 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2021-01-06 17:07:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:31,023 INFO L225 Difference]: With dead ends: 77 [2021-01-06 17:07:31,023 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 17:07:31,024 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 [2021-01-06 17:07:31,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 17:07:31,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 37. [2021-01-06 17:07:31,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:07:31,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-01-06 17:07:31,032 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 24 [2021-01-06 17:07:31,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:31,032 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-01-06 17:07:31,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:07:31,032 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-01-06 17:07:31,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:07:31,033 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:31,033 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] [2021-01-06 17:07:31,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:31,249 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:31,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:31,250 INFO L82 PathProgramCache]: Analyzing trace with hash 571706934, now seen corresponding path program 2 times [2021-01-06 17:07:31,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:31,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277235847] [2021-01-06 17:07:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:31,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277235847] [2021-01-06 17:07:31,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893705953] [2021-01-06 17:07:31,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-06 17:07:31,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:07:31,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:31,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 17:07:31,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:31,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:31,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 17:07:31,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242542001] [2021-01-06 17:07:31,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:07:31,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:31,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:07:31,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:07:31,524 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 10 states. [2021-01-06 17:07:31,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:31,631 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2021-01-06 17:07:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:07:31,631 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2021-01-06 17:07:31,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:31,632 INFO L225 Difference]: With dead ends: 63 [2021-01-06 17:07:31,632 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 17:07:31,633 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 [2021-01-06 17:07:31,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 17:07:31,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2021-01-06 17:07:31,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 17:07:31,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2021-01-06 17:07:31,641 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 25 [2021-01-06 17:07:31,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:31,642 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2021-01-06 17:07:31,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:07:31,642 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2021-01-06 17:07:31,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:07:31,642 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:31,643 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] [2021-01-06 17:07:31,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:07:31,856 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:31,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:31,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1510332885, now seen corresponding path program 3 times [2021-01-06 17:07:31,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:31,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837396279] [2021-01-06 17:07:31,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:31,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837396279] [2021-01-06 17:07:31,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769126648] [2021-01-06 17:07:31,905 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 [2021-01-06 17:07:31,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:07:31,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:31,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:07:31,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:32,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:32,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-01-06 17:07:32,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157654804] [2021-01-06 17:07:32,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:07:32,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:32,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:07:32,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:07:32,034 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 9 states. [2021-01-06 17:07:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:32,064 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2021-01-06 17:07:32,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:07:32,065 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2021-01-06 17:07:32,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:32,066 INFO L225 Difference]: With dead ends: 72 [2021-01-06 17:07:32,066 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:07:32,066 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 [2021-01-06 17:07:32,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:07:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-01-06 17:07:32,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 17:07:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2021-01-06 17:07:32,077 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 25 [2021-01-06 17:07:32,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:32,077 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2021-01-06 17:07:32,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:07:32,078 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2021-01-06 17:07:32,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:07:32,078 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:32,078 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] [2021-01-06 17:07:32,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:32,293 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:32,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:32,294 INFO L82 PathProgramCache]: Analyzing trace with hash 595735960, now seen corresponding path program 4 times [2021-01-06 17:07:32,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:32,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035477569] [2021-01-06 17:07:32,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:32,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035477569] [2021-01-06 17:07:32,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296630088] [2021-01-06 17:07:32,341 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 [2021-01-06 17:07:32,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:07:32,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:32,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:07:32,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:32,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:32,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-01-06 17:07:32,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406063250] [2021-01-06 17:07:32,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:07:32,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:32,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:07:32,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:07:32,470 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand 9 states. [2021-01-06 17:07:32,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:32,508 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2021-01-06 17:07:32,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:07:32,509 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2021-01-06 17:07:32,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:32,510 INFO L225 Difference]: With dead ends: 126 [2021-01-06 17:07:32,510 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 17:07:32,511 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 [2021-01-06 17:07:32,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 17:07:32,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2021-01-06 17:07:32,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 17:07:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2021-01-06 17:07:32,548 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 25 [2021-01-06 17:07:32,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:32,548 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2021-01-06 17:07:32,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:07:32,549 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2021-01-06 17:07:32,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:07:32,549 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:32,549 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] [2021-01-06 17:07:32,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:07:32,751 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:32,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:32,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1299373655, now seen corresponding path program 5 times [2021-01-06 17:07:32,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:32,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49879034] [2021-01-06 17:07:32,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:32,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49879034] [2021-01-06 17:07:32,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921425899] [2021-01-06 17:07:32,835 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 [2021-01-06 17:07:32,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:07:32,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:32,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 17:07:32,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:33,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:33,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-01-06 17:07:33,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842516945] [2021-01-06 17:07:33,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:07:33,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:33,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:07:33,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:07:33,006 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 11 states. [2021-01-06 17:07:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:33,160 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2021-01-06 17:07:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:07:33,161 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2021-01-06 17:07:33,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:33,161 INFO L225 Difference]: With dead ends: 90 [2021-01-06 17:07:33,161 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 17:07:33,162 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 [2021-01-06 17:07:33,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 17:07:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2021-01-06 17:07:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 17:07:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2021-01-06 17:07:33,173 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 25 [2021-01-06 17:07:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:33,174 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2021-01-06 17:07:33,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:07:33,174 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2021-01-06 17:07:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 17:07:33,174 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:33,174 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] [2021-01-06 17:07:33,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 17:07:33,388 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:33,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:33,389 INFO L82 PathProgramCache]: Analyzing trace with hash -120572194, now seen corresponding path program 6 times [2021-01-06 17:07:33,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:33,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071445711] [2021-01-06 17:07:33,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 17:07:33,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071445711] [2021-01-06 17:07:33,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19296373] [2021-01-06 17:07:33,472 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 [2021-01-06 17:07:33,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 17:07:33,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:33,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 17:07:33,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:07:33,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:33,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-01-06 17:07:33,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422074102] [2021-01-06 17:07:33,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:07:33,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:33,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:07:33,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:07:33,629 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 11 states. [2021-01-06 17:07:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:33,777 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2021-01-06 17:07:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:07:33,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2021-01-06 17:07:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:33,778 INFO L225 Difference]: With dead ends: 104 [2021-01-06 17:07:33,779 INFO L226 Difference]: Without dead ends: 79 [2021-01-06 17:07:33,779 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 [2021-01-06 17:07:33,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-06 17:07:33,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-01-06 17:07:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 17:07:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2021-01-06 17:07:33,793 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 26 [2021-01-06 17:07:33,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:33,793 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2021-01-06 17:07:33,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:07:33,793 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2021-01-06 17:07:33,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 17:07:33,794 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:33,794 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] [2021-01-06 17:07:34,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:07:34,010 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:34,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:34,011 INFO L82 PathProgramCache]: Analyzing trace with hash -2006452209, now seen corresponding path program 7 times [2021-01-06 17:07:34,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:34,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872364069] [2021-01-06 17:07:34,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:07:34,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872364069] [2021-01-06 17:07:34,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604890527] [2021-01-06 17:07:34,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-06 17:07:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:34,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 17:07:34,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:34,558 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:07:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:07:34,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:34,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-01-06 17:07:34,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233888881] [2021-01-06 17:07:34,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 17:07:34,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:34,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 17:07:34,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:07:34,590 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand 23 states. [2021-01-06 17:07:35,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:35,214 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2021-01-06 17:07:35,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 17:07:35,214 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2021-01-06 17:07:35,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:35,216 INFO L225 Difference]: With dead ends: 159 [2021-01-06 17:07:35,216 INFO L226 Difference]: Without dead ends: 150 [2021-01-06 17:07:35,217 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 [2021-01-06 17:07:35,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-01-06 17:07:35,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 88. [2021-01-06 17:07:35,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 17:07:35,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2021-01-06 17:07:35,235 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 26 [2021-01-06 17:07:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:35,235 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2021-01-06 17:07:35,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 17:07:35,235 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2021-01-06 17:07:35,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 17:07:35,237 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:35,237 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] [2021-01-06 17:07:35,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 17:07:35,451 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:35,452 INFO L82 PathProgramCache]: Analyzing trace with hash -216163038, now seen corresponding path program 8 times [2021-01-06 17:07:35,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:35,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649460493] [2021-01-06 17:07:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 17:07:35,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649460493] [2021-01-06 17:07:35,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973786245] [2021-01-06 17:07:35,545 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 [2021-01-06 17:07:35,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:07:35,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:35,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 17:07:35,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:07:35,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:35,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2021-01-06 17:07:35,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000089098] [2021-01-06 17:07:35,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:07:35,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:35,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:07:35,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:07:35,740 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 12 states. [2021-01-06 17:07:35,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:35,906 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2021-01-06 17:07:35,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:07:35,907 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2021-01-06 17:07:35,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:35,907 INFO L225 Difference]: With dead ends: 107 [2021-01-06 17:07:35,907 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 17:07:35,908 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 [2021-01-06 17:07:35,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 17:07:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2021-01-06 17:07:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 17:07:35,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2021-01-06 17:07:35,923 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 26 [2021-01-06 17:07:35,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:35,923 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2021-01-06 17:07:35,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:07:35,923 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2021-01-06 17:07:35,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 17:07:35,924 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:35,924 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] [2021-01-06 17:07:36,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 17:07:36,138 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:36,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:36,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1407838889, now seen corresponding path program 9 times [2021-01-06 17:07:36,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:36,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803683278] [2021-01-06 17:07:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:36,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803683278] [2021-01-06 17:07:36,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944867077] [2021-01-06 17:07:36,252 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 [2021-01-06 17:07:36,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:07:36,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:36,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 17:07:36,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:36,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:36,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-06 17:07:36,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231434788] [2021-01-06 17:07:36,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:07:36,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:36,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:07:36,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:07:36,498 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand 15 states. [2021-01-06 17:07:36,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:36,816 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2021-01-06 17:07:36,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:07:36,816 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2021-01-06 17:07:36,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:36,817 INFO L225 Difference]: With dead ends: 131 [2021-01-06 17:07:36,817 INFO L226 Difference]: Without dead ends: 107 [2021-01-06 17:07:36,818 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 [2021-01-06 17:07:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-01-06 17:07:36,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 83. [2021-01-06 17:07:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 17:07:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2021-01-06 17:07:36,834 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 27 [2021-01-06 17:07:36,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:36,834 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2021-01-06 17:07:36,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:07:36,834 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2021-01-06 17:07:36,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 17:07:36,835 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:36,835 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] [2021-01-06 17:07:37,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:37,050 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:37,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:37,051 INFO L82 PathProgramCache]: Analyzing trace with hash -325007018, now seen corresponding path program 10 times [2021-01-06 17:07:37,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:37,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565807927] [2021-01-06 17:07:37,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:37,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565807927] [2021-01-06 17:07:37,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6361902] [2021-01-06 17:07:37,175 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 [2021-01-06 17:07:37,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:07:37,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:37,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 17:07:37,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:37,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:37,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-01-06 17:07:37,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022302640] [2021-01-06 17:07:37,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:07:37,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:37,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:07:37,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:07:37,417 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 16 states. [2021-01-06 17:07:37,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:37,723 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2021-01-06 17:07:37,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:07:37,723 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2021-01-06 17:07:37,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:37,724 INFO L225 Difference]: With dead ends: 121 [2021-01-06 17:07:37,724 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 17:07:37,725 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 [2021-01-06 17:07:37,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 17:07:37,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2021-01-06 17:07:37,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 17:07:37,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2021-01-06 17:07:37,740 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 27 [2021-01-06 17:07:37,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:37,740 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2021-01-06 17:07:37,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:07:37,740 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2021-01-06 17:07:37,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 17:07:37,741 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:37,741 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] [2021-01-06 17:07:37,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-01-06 17:07:37,955 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:37,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:37,956 INFO L82 PathProgramCache]: Analyzing trace with hash 480362644, now seen corresponding path program 11 times [2021-01-06 17:07:37,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:37,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647737046] [2021-01-06 17:07:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 17:07:38,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647737046] [2021-01-06 17:07:38,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446146416] [2021-01-06 17:07:38,009 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 [2021-01-06 17:07:38,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:07:38,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:38,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:07:38,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 17:07:38,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:38,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 17:07:38,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251800726] [2021-01-06 17:07:38,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:07:38,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:38,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:07:38,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:07:38,160 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand 10 states. [2021-01-06 17:07:38,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:38,228 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2021-01-06 17:07:38,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:07:38,229 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2021-01-06 17:07:38,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:38,229 INFO L225 Difference]: With dead ends: 110 [2021-01-06 17:07:38,229 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 17:07:38,230 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 [2021-01-06 17:07:38,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 17:07:38,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-01-06 17:07:38,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 17:07:38,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2021-01-06 17:07:38,245 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 27 [2021-01-06 17:07:38,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:38,245 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2021-01-06 17:07:38,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:07:38,246 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2021-01-06 17:07:38,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 17:07:38,246 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:38,246 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] [2021-01-06 17:07:38,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:38,461 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:38,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:38,461 INFO L82 PathProgramCache]: Analyzing trace with hash 400247189, now seen corresponding path program 12 times [2021-01-06 17:07:38,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:38,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174163607] [2021-01-06 17:07:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 17:07:38,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174163607] [2021-01-06 17:07:38,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43225370] [2021-01-06 17:07:38,520 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 [2021-01-06 17:07:38,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 17:07:38,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:38,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:07:38,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 17:07:38,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:38,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 17:07:38,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140459725] [2021-01-06 17:07:38,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:07:38,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:38,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:07:38,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:07:38,650 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand 10 states. [2021-01-06 17:07:38,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:38,696 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-01-06 17:07:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:07:38,696 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2021-01-06 17:07:38,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:38,697 INFO L225 Difference]: With dead ends: 84 [2021-01-06 17:07:38,697 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 17:07:38,698 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 [2021-01-06 17:07:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 17:07:38,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-01-06 17:07:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 17:07:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2021-01-06 17:07:38,709 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 27 [2021-01-06 17:07:38,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:38,710 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2021-01-06 17:07:38,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:07:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2021-01-06 17:07:38,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 17:07:38,710 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:38,710 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] [2021-01-06 17:07:38,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 17:07:38,925 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:38,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:38,926 INFO L82 PathProgramCache]: Analyzing trace with hash -822645520, now seen corresponding path program 13 times [2021-01-06 17:07:38,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:38,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194035719] [2021-01-06 17:07:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:07:39,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194035719] [2021-01-06 17:07:39,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109403392] [2021-01-06 17:07:39,200 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 [2021-01-06 17:07:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:39,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 17:07:39,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:39,512 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:07:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:07:39,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:39,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-01-06 17:07:39,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244374013] [2021-01-06 17:07:39,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 17:07:39,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:39,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 17:07:39,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:07:39,543 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 26 states. [2021-01-06 17:07:40,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:40,276 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2021-01-06 17:07:40,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 17:07:40,276 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2021-01-06 17:07:40,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:40,277 INFO L225 Difference]: With dead ends: 149 [2021-01-06 17:07:40,278 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 17:07:40,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 17:07:40,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 17:07:40,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 81. [2021-01-06 17:07:40,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 17:07:40,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2021-01-06 17:07:40,294 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 28 [2021-01-06 17:07:40,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:40,294 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2021-01-06 17:07:40,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 17:07:40,294 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2021-01-06 17:07:40,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 17:07:40,295 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:40,295 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] [2021-01-06 17:07:40,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:40,510 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:40,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:40,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1124024368, now seen corresponding path program 14 times [2021-01-06 17:07:40,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:40,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112200295] [2021-01-06 17:07:40,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:07:40,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112200295] [2021-01-06 17:07:40,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480310068] [2021-01-06 17:07:40,747 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 [2021-01-06 17:07:40,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:07:40,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:40,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 17:07:40,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:41,083 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:07:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:07:41,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:41,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2021-01-06 17:07:41,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951342379] [2021-01-06 17:07:41,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 17:07:41,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:41,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 17:07:41,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:07:41,123 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 24 states. [2021-01-06 17:07:41,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:41,787 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2021-01-06 17:07:41,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:07:41,788 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2021-01-06 17:07:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:41,789 INFO L225 Difference]: With dead ends: 118 [2021-01-06 17:07:41,789 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 17:07:41,790 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 [2021-01-06 17:07:41,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 17:07:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2021-01-06 17:07:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 17:07:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2021-01-06 17:07:41,807 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 28 [2021-01-06 17:07:41,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:41,808 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2021-01-06 17:07:41,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 17:07:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2021-01-06 17:07:41,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 17:07:41,808 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:41,808 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] [2021-01-06 17:07:42,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 17:07:42,023 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:42,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:42,024 INFO L82 PathProgramCache]: Analyzing trace with hash 930430102, now seen corresponding path program 15 times [2021-01-06 17:07:42,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:42,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657588398] [2021-01-06 17:07:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:42,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657588398] [2021-01-06 17:07:42,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754613062] [2021-01-06 17:07:42,174 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 [2021-01-06 17:07:42,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:07:42,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:42,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:07:42,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:42,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:42,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-06 17:07:42,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718582132] [2021-01-06 17:07:42,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:07:42,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:42,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:07:42,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:07:42,531 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand 19 states. [2021-01-06 17:07:43,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:43,407 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2021-01-06 17:07:43,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 17:07:43,407 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 29 [2021-01-06 17:07:43,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:43,408 INFO L225 Difference]: With dead ends: 155 [2021-01-06 17:07:43,408 INFO L226 Difference]: Without dead ends: 129 [2021-01-06 17:07:43,409 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 [2021-01-06 17:07:43,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-01-06 17:07:43,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2021-01-06 17:07:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 17:07:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2021-01-06 17:07:43,434 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 29 [2021-01-06 17:07:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:43,434 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2021-01-06 17:07:43,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:07:43,434 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2021-01-06 17:07:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 17:07:43,435 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:43,435 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] [2021-01-06 17:07:43,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 17:07:43,649 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:43,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:43,650 INFO L82 PathProgramCache]: Analyzing trace with hash 138479735, now seen corresponding path program 16 times [2021-01-06 17:07:43,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:43,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290286428] [2021-01-06 17:07:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:43,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290286428] [2021-01-06 17:07:43,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873653977] [2021-01-06 17:07:43,820 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 [2021-01-06 17:07:43,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:07:43,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:43,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:07:43,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:44,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:44,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-01-06 17:07:44,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879323824] [2021-01-06 17:07:44,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:07:44,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:44,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:07:44,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:07:44,192 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand 20 states. [2021-01-06 17:07:44,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:44,688 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2021-01-06 17:07:44,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:07:44,689 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2021-01-06 17:07:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:44,690 INFO L225 Difference]: With dead ends: 144 [2021-01-06 17:07:44,690 INFO L226 Difference]: Without dead ends: 131 [2021-01-06 17:07:44,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:07:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-06 17:07:44,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2021-01-06 17:07:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 17:07:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2021-01-06 17:07:44,711 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 29 [2021-01-06 17:07:44,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:44,711 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2021-01-06 17:07:44,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:07:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2021-01-06 17:07:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 17:07:44,712 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:44,712 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] [2021-01-06 17:07:44,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 17:07:44,927 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:44,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:44,927 INFO L82 PathProgramCache]: Analyzing trace with hash 2086280437, now seen corresponding path program 17 times [2021-01-06 17:07:44,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:44,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509459868] [2021-01-06 17:07:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 17:07:45,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509459868] [2021-01-06 17:07:45,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299468902] [2021-01-06 17:07:45,003 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 [2021-01-06 17:07:45,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 17:07:45,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:45,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:07:45,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 17:07:45,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:45,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-01-06 17:07:45,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147292085] [2021-01-06 17:07:45,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:07:45,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:45,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:07:45,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:07:45,160 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand 12 states. [2021-01-06 17:07:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:45,255 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2021-01-06 17:07:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:07:45,256 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2021-01-06 17:07:45,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:45,256 INFO L225 Difference]: With dead ends: 139 [2021-01-06 17:07:45,257 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 17:07:45,257 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 [2021-01-06 17:07:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 17:07:45,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2021-01-06 17:07:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 17:07:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2021-01-06 17:07:45,279 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 29 [2021-01-06 17:07:45,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:45,279 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2021-01-06 17:07:45,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:07:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2021-01-06 17:07:45,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 17:07:45,280 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:45,280 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] [2021-01-06 17:07:45,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 17:07:45,495 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:45,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:45,495 INFO L82 PathProgramCache]: Analyzing trace with hash -397298668, now seen corresponding path program 18 times [2021-01-06 17:07:45,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:45,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658287217] [2021-01-06 17:07:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 17:07:45,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658287217] [2021-01-06 17:07:45,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697056342] [2021-01-06 17:07:45,550 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 [2021-01-06 17:07:45,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 17:07:45,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:45,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:07:45,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 17:07:45,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:45,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-01-06 17:07:45,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220823822] [2021-01-06 17:07:45,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:07:45,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:45,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:07:45,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:07:45,704 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand 12 states. [2021-01-06 17:07:45,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:45,828 INFO L93 Difference]: Finished difference Result 262 states and 317 transitions. [2021-01-06 17:07:45,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:07:45,829 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2021-01-06 17:07:45,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:45,831 INFO L225 Difference]: With dead ends: 262 [2021-01-06 17:07:45,831 INFO L226 Difference]: Without dead ends: 202 [2021-01-06 17:07:45,832 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 [2021-01-06 17:07:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-01-06 17:07:45,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 134. [2021-01-06 17:07:45,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 17:07:45,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 163 transitions. [2021-01-06 17:07:45,867 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 163 transitions. Word has length 29 [2021-01-06 17:07:45,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:45,867 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 163 transitions. [2021-01-06 17:07:45,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:07:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 163 transitions. [2021-01-06 17:07:45,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:07:45,868 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:45,868 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] [2021-01-06 17:07:46,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 17:07:46,082 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:46,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:46,084 INFO L82 PathProgramCache]: Analyzing trace with hash 660541935, now seen corresponding path program 19 times [2021-01-06 17:07:46,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:46,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301554855] [2021-01-06 17:07:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:07:46,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301554855] [2021-01-06 17:07:46,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664108186] [2021-01-06 17:07:46,470 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 [2021-01-06 17:07:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:46,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 17:07:46,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:46,925 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:07:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:07:46,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:46,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2021-01-06 17:07:46,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263620502] [2021-01-06 17:07:46,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 17:07:46,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:46,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 17:07:46,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:07:46,968 INFO L87 Difference]: Start difference. First operand 134 states and 163 transitions. Second operand 29 states. [2021-01-06 17:07:48,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:48,076 INFO L93 Difference]: Finished difference Result 258 states and 295 transitions. [2021-01-06 17:07:48,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 17:07:48,077 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 30 [2021-01-06 17:07:48,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:48,078 INFO L225 Difference]: With dead ends: 258 [2021-01-06 17:07:48,079 INFO L226 Difference]: Without dead ends: 249 [2021-01-06 17:07:48,081 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 [2021-01-06 17:07:48,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-01-06 17:07:48,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 143. [2021-01-06 17:07:48,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2021-01-06 17:07:48,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2021-01-06 17:07:48,110 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 30 [2021-01-06 17:07:48,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:48,110 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2021-01-06 17:07:48,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 17:07:48,111 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2021-01-06 17:07:48,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:07:48,111 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:48,111 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] [2021-01-06 17:07:48,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:48,325 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:48,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:48,325 INFO L82 PathProgramCache]: Analyzing trace with hash 283195298, now seen corresponding path program 20 times [2021-01-06 17:07:48,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:48,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516798047] [2021-01-06 17:07:48,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 17:07:48,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516798047] [2021-01-06 17:07:48,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957249768] [2021-01-06 17:07:48,428 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 [2021-01-06 17:07:48,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:07:48,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:48,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 17:07:48,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 17:07:48,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:48,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-01-06 17:07:48,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031104649] [2021-01-06 17:07:48,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:07:48,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:48,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:07:48,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:07:48,710 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand 16 states. [2021-01-06 17:07:49,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:49,125 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2021-01-06 17:07:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:07:49,126 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2021-01-06 17:07:49,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:49,127 INFO L225 Difference]: With dead ends: 217 [2021-01-06 17:07:49,127 INFO L226 Difference]: Without dead ends: 181 [2021-01-06 17:07:49,128 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 [2021-01-06 17:07:49,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-01-06 17:07:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 154. [2021-01-06 17:07:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 17:07:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2021-01-06 17:07:49,161 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 30 [2021-01-06 17:07:49,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:49,162 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2021-01-06 17:07:49,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:07:49,162 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2021-01-06 17:07:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:07:49,162 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:49,163 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] [2021-01-06 17:07:49,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:49,377 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:49,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:49,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1226887537, now seen corresponding path program 21 times [2021-01-06 17:07:49,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:49,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453405205] [2021-01-06 17:07:49,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:07:49,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453405205] [2021-01-06 17:07:49,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536236238] [2021-01-06 17:07:49,689 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 [2021-01-06 17:07:49,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:07:49,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:49,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 17:07:49,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:50,120 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:07:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:07:50,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:50,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-01-06 17:07:50,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632314535] [2021-01-06 17:07:50,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 17:07:50,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:50,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 17:07:50,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:07:50,152 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand 27 states. [2021-01-06 17:07:51,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:51,045 INFO L93 Difference]: Finished difference Result 226 states and 258 transitions. [2021-01-06 17:07:51,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 17:07:51,046 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2021-01-06 17:07:51,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:51,047 INFO L225 Difference]: With dead ends: 226 [2021-01-06 17:07:51,048 INFO L226 Difference]: Without dead ends: 204 [2021-01-06 17:07:51,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 17:07:51,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-01-06 17:07:51,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 153. [2021-01-06 17:07:51,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2021-01-06 17:07:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 183 transitions. [2021-01-06 17:07:51,081 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 183 transitions. Word has length 30 [2021-01-06 17:07:51,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:51,081 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 183 transitions. [2021-01-06 17:07:51,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 17:07:51,082 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 183 transitions. [2021-01-06 17:07:51,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:07:51,082 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:51,082 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] [2021-01-06 17:07:51,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:51,297 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:51,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:51,298 INFO L82 PathProgramCache]: Analyzing trace with hash 628770462, now seen corresponding path program 22 times [2021-01-06 17:07:51,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:51,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455999274] [2021-01-06 17:07:51,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 17:07:51,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455999274] [2021-01-06 17:07:51,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536092543] [2021-01-06 17:07:51,420 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 [2021-01-06 17:07:51,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:07:51,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:51,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 17:07:51,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 17:07:51,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:51,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-01-06 17:07:51,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325933171] [2021-01-06 17:07:51,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:07:51,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:51,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:07:51,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:07:51,718 INFO L87 Difference]: Start difference. First operand 153 states and 183 transitions. Second operand 17 states. [2021-01-06 17:07:52,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:52,064 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2021-01-06 17:07:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:07:52,065 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2021-01-06 17:07:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:52,066 INFO L225 Difference]: With dead ends: 186 [2021-01-06 17:07:52,066 INFO L226 Difference]: Without dead ends: 167 [2021-01-06 17:07:52,066 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 [2021-01-06 17:07:52,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-01-06 17:07:52,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2021-01-06 17:07:52,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2021-01-06 17:07:52,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 179 transitions. [2021-01-06 17:07:52,093 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 179 transitions. Word has length 30 [2021-01-06 17:07:52,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:52,094 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 179 transitions. [2021-01-06 17:07:52,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:07:52,094 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 179 transitions. [2021-01-06 17:07:52,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 17:07:52,095 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:52,095 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] [2021-01-06 17:07:52,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-06 17:07:52,306 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:52,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:52,306 INFO L82 PathProgramCache]: Analyzing trace with hash -335399049, now seen corresponding path program 23 times [2021-01-06 17:07:52,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:52,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508557632] [2021-01-06 17:07:52,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:52,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508557632] [2021-01-06 17:07:52,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678435804] [2021-01-06 17:07:52,466 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 [2021-01-06 17:07:52,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 17:07:52,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:52,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:07:52,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:52,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:52,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-06 17:07:52,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614387677] [2021-01-06 17:07:52,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 17:07:52,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:52,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 17:07:52,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:07:52,935 INFO L87 Difference]: Start difference. First operand 153 states and 179 transitions. Second operand 23 states. [2021-01-06 17:07:54,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:54,447 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2021-01-06 17:07:54,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 17:07:54,448 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2021-01-06 17:07:54,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:54,449 INFO L225 Difference]: With dead ends: 263 [2021-01-06 17:07:54,449 INFO L226 Difference]: Without dead ends: 233 [2021-01-06 17:07:54,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=455, Invalid=1801, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 17:07:54,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-01-06 17:07:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 168. [2021-01-06 17:07:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2021-01-06 17:07:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 197 transitions. [2021-01-06 17:07:54,482 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 197 transitions. Word has length 31 [2021-01-06 17:07:54,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:54,483 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 197 transitions. [2021-01-06 17:07:54,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 17:07:54,483 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 197 transitions. [2021-01-06 17:07:54,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 17:07:54,483 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:54,484 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] [2021-01-06 17:07:54,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:54,690 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:54,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:54,690 INFO L82 PathProgramCache]: Analyzing trace with hash 883943350, now seen corresponding path program 24 times [2021-01-06 17:07:54,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:54,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693614321] [2021-01-06 17:07:54,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:54,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693614321] [2021-01-06 17:07:54,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910644914] [2021-01-06 17:07:54,892 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 [2021-01-06 17:07:54,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 17:07:54,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:54,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:07:54,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:07:55,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:55,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-01-06 17:07:55,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979020278] [2021-01-06 17:07:55,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 17:07:55,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:55,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 17:07:55,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:07:55,401 INFO L87 Difference]: Start difference. First operand 168 states and 197 transitions. Second operand 24 states. [2021-01-06 17:07:56,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:56,179 INFO L93 Difference]: Finished difference Result 251 states and 283 transitions. [2021-01-06 17:07:56,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:07:56,180 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2021-01-06 17:07:56,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:56,181 INFO L225 Difference]: With dead ends: 251 [2021-01-06 17:07:56,181 INFO L226 Difference]: Without dead ends: 236 [2021-01-06 17:07:56,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:07:56,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-01-06 17:07:56,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2021-01-06 17:07:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2021-01-06 17:07:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2021-01-06 17:07:56,214 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 31 [2021-01-06 17:07:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:56,215 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2021-01-06 17:07:56,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 17:07:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2021-01-06 17:07:56,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 17:07:56,215 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:56,216 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] [2021-01-06 17:07:56,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 17:07:56,430 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:56,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:56,430 INFO L82 PathProgramCache]: Analyzing trace with hash 2026567256, now seen corresponding path program 25 times [2021-01-06 17:07:56,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:56,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113660393] [2021-01-06 17:07:56,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 17:07:56,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113660393] [2021-01-06 17:07:56,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627577786] [2021-01-06 17:07:56,491 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 [2021-01-06 17:07:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:56,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:07:56,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 17:07:56,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:56,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-01-06 17:07:56,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284248958] [2021-01-06 17:07:56,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:07:56,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:56,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:07:56,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:07:56,657 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand 13 states. [2021-01-06 17:07:56,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:56,779 INFO L93 Difference]: Finished difference Result 227 states and 261 transitions. [2021-01-06 17:07:56,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:07:56,780 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2021-01-06 17:07:56,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:56,781 INFO L225 Difference]: With dead ends: 227 [2021-01-06 17:07:56,781 INFO L226 Difference]: Without dead ends: 171 [2021-01-06 17:07:56,782 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 [2021-01-06 17:07:56,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-01-06 17:07:56,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2021-01-06 17:07:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 17:07:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2021-01-06 17:07:56,817 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 31 [2021-01-06 17:07:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:56,818 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2021-01-06 17:07:56,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:07:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2021-01-06 17:07:56,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 17:07:56,818 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:56,818 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] [2021-01-06 17:07:57,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:57,033 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:57,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1679203531, now seen corresponding path program 26 times [2021-01-06 17:07:57,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:57,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278867967] [2021-01-06 17:07:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 17:07:57,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278867967] [2021-01-06 17:07:57,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822325277] [2021-01-06 17:07:57,107 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 [2021-01-06 17:07:57,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:07:57,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:57,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:07:57,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 17:07:57,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:57,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-01-06 17:07:57,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072404919] [2021-01-06 17:07:57,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:07:57,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:57,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:07:57,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:07:57,278 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand 13 states. [2021-01-06 17:07:57,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:57,424 INFO L93 Difference]: Finished difference Result 178 states and 201 transitions. [2021-01-06 17:07:57,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:07:57,425 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2021-01-06 17:07:57,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:57,426 INFO L225 Difference]: With dead ends: 178 [2021-01-06 17:07:57,426 INFO L226 Difference]: Without dead ends: 172 [2021-01-06 17:07:57,427 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 [2021-01-06 17:07:57,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-01-06 17:07:57,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2021-01-06 17:07:57,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 17:07:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2021-01-06 17:07:57,466 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 31 [2021-01-06 17:07:57,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:57,466 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2021-01-06 17:07:57,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:07:57,466 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2021-01-06 17:07:57,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 17:07:57,467 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:57,467 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] [2021-01-06 17:07:57,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 17:07:57,683 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:57,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:57,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1999889776, now seen corresponding path program 27 times [2021-01-06 17:07:57,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:57,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11052807] [2021-01-06 17:07:57,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:07:58,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11052807] [2021-01-06 17:07:58,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108858247] [2021-01-06 17:07:58,100 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 [2021-01-06 17:07:58,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 17:07:58,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:58,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 17:07:58,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:58,574 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:07:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:07:58,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:58,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 32 [2021-01-06 17:07:58,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420833224] [2021-01-06 17:07:58,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 17:07:58,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:58,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 17:07:58,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:07:58,614 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand 32 states. [2021-01-06 17:07:59,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:59,890 INFO L93 Difference]: Finished difference Result 305 states and 337 transitions. [2021-01-06 17:07:59,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 17:07:59,891 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2021-01-06 17:07:59,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:59,892 INFO L225 Difference]: With dead ends: 305 [2021-01-06 17:07:59,892 INFO L226 Difference]: Without dead ends: 296 [2021-01-06 17:07:59,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=251, Invalid=2505, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 17:07:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-01-06 17:07:59,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 167. [2021-01-06 17:07:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-01-06 17:07:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 193 transitions. [2021-01-06 17:07:59,926 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 193 transitions. Word has length 32 [2021-01-06 17:07:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:59,927 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 193 transitions. [2021-01-06 17:07:59,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 17:07:59,927 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 193 transitions. [2021-01-06 17:07:59,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 17:07:59,927 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:59,927 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] [2021-01-06 17:08:00,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:08:00,136 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:00,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:00,136 INFO L82 PathProgramCache]: Analyzing trace with hash -120192688, now seen corresponding path program 28 times [2021-01-06 17:08:00,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:00,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325932764] [2021-01-06 17:08:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:08:00,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325932764] [2021-01-06 17:08:00,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701585315] [2021-01-06 17:08:00,485 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 [2021-01-06 17:08:00,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:08:00,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:00,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 17:08:00,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:00,930 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:08:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:08:00,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:00,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 30 [2021-01-06 17:08:00,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102852106] [2021-01-06 17:08:00,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 17:08:00,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:00,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 17:08:00,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:08:00,969 INFO L87 Difference]: Start difference. First operand 167 states and 193 transitions. Second operand 30 states. [2021-01-06 17:08:02,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:02,089 INFO L93 Difference]: Finished difference Result 223 states and 248 transitions. [2021-01-06 17:08:02,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 17:08:02,090 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2021-01-06 17:08:02,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:02,091 INFO L225 Difference]: With dead ends: 223 [2021-01-06 17:08:02,092 INFO L226 Difference]: Without dead ends: 200 [2021-01-06 17:08:02,093 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 [2021-01-06 17:08:02,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-01-06 17:08:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 158. [2021-01-06 17:08:02,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 17:08:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2021-01-06 17:08:02,130 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 32 [2021-01-06 17:08:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:02,130 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2021-01-06 17:08:02,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 17:08:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2021-01-06 17:08:02,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 17:08:02,130 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:02,130 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] [2021-01-06 17:08:02,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 17:08:02,331 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:02,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:02,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1085561488, now seen corresponding path program 29 times [2021-01-06 17:08:02,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:02,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619338914] [2021-01-06 17:08:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 17:08:02,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619338914] [2021-01-06 17:08:02,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922946644] [2021-01-06 17:08:02,609 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 [2021-01-06 17:08:02,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 17:08:02,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:02,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 17:08:02,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:03,087 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:08:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 17:08:03,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:03,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-01-06 17:08:03,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724048106] [2021-01-06 17:08:03,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 17:08:03,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:03,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 17:08:03,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:08:03,130 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand 28 states. [2021-01-06 17:08:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:03,950 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2021-01-06 17:08:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 17:08:03,951 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2021-01-06 17:08:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:03,953 INFO L225 Difference]: With dead ends: 198 [2021-01-06 17:08:03,953 INFO L226 Difference]: Without dead ends: 192 [2021-01-06 17:08:03,954 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 [2021-01-06 17:08:03,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-01-06 17:08:04,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 169. [2021-01-06 17:08:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2021-01-06 17:08:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 196 transitions. [2021-01-06 17:08:04,001 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 196 transitions. Word has length 32 [2021-01-06 17:08:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:04,001 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 196 transitions. [2021-01-06 17:08:04,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 17:08:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 196 transitions. [2021-01-06 17:08:04,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 17:08:04,002 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:04,002 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] [2021-01-06 17:08:04,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 17:08:04,217 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:04,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:04,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1204403466, now seen corresponding path program 30 times [2021-01-06 17:08:04,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:04,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304157500] [2021-01-06 17:08:04,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:08:04,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304157500] [2021-01-06 17:08:04,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825175773] [2021-01-06 17:08:04,424 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 [2021-01-06 17:08:04,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 17:08:04,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:04,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:08:04,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:08:04,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:04,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-01-06 17:08:04,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536043424] [2021-01-06 17:08:04,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 17:08:04,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:04,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 17:08:04,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:08:04,982 INFO L87 Difference]: Start difference. First operand 169 states and 196 transitions. Second operand 27 states. [2021-01-06 17:08:07,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:07,309 INFO L93 Difference]: Finished difference Result 299 states and 335 transitions. [2021-01-06 17:08:07,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 17:08:07,311 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 33 [2021-01-06 17:08:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:07,312 INFO L225 Difference]: With dead ends: 299 [2021-01-06 17:08:07,312 INFO L226 Difference]: Without dead ends: 267 [2021-01-06 17:08:07,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=716, Invalid=2944, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 17:08:07,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-01-06 17:08:07,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 185. [2021-01-06 17:08:07,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-01-06 17:08:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 215 transitions. [2021-01-06 17:08:07,363 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 215 transitions. Word has length 33 [2021-01-06 17:08:07,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:07,363 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 215 transitions. [2021-01-06 17:08:07,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 17:08:07,363 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 215 transitions. [2021-01-06 17:08:07,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 17:08:07,364 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:07,364 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] [2021-01-06 17:08:07,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 17:08:07,578 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:07,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:07,578 INFO L82 PathProgramCache]: Analyzing trace with hash -2059494761, now seen corresponding path program 31 times [2021-01-06 17:08:07,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:07,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792756344] [2021-01-06 17:08:07,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:08:07,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792756344] [2021-01-06 17:08:07,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886402155] [2021-01-06 17:08:07,831 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 [2021-01-06 17:08:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:07,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:08:07,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:08:08,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:08,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-01-06 17:08:08,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767908779] [2021-01-06 17:08:08,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 17:08:08,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:08,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 17:08:08,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:08:08,419 INFO L87 Difference]: Start difference. First operand 185 states and 215 transitions. Second operand 28 states. [2021-01-06 17:08:09,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:09,319 INFO L93 Difference]: Finished difference Result 286 states and 319 transitions. [2021-01-06 17:08:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:08:09,319 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2021-01-06 17:08:09,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:09,321 INFO L225 Difference]: With dead ends: 286 [2021-01-06 17:08:09,321 INFO L226 Difference]: Without dead ends: 270 [2021-01-06 17:08:09,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 17:08:09,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-01-06 17:08:09,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 188. [2021-01-06 17:08:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2021-01-06 17:08:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 218 transitions. [2021-01-06 17:08:09,369 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 218 transitions. Word has length 33 [2021-01-06 17:08:09,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:09,369 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 218 transitions. [2021-01-06 17:08:09,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 17:08:09,369 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 218 transitions. [2021-01-06 17:08:09,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 17:08:09,370 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:09,370 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] [2021-01-06 17:08:09,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-01-06 17:08:09,584 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:09,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:09,585 INFO L82 PathProgramCache]: Analyzing trace with hash 893931157, now seen corresponding path program 32 times [2021-01-06 17:08:09,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:09,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884134677] [2021-01-06 17:08:09,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 17:08:09,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884134677] [2021-01-06 17:08:09,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874322988] [2021-01-06 17:08:09,659 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 [2021-01-06 17:08:09,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:08:09,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:09,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:08:09,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 17:08:09,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:09,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-01-06 17:08:09,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322123837] [2021-01-06 17:08:09,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:08:09,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:09,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:08:09,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:08:09,842 INFO L87 Difference]: Start difference. First operand 188 states and 218 transitions. Second operand 15 states. [2021-01-06 17:08:10,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:10,063 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2021-01-06 17:08:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:08:10,064 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2021-01-06 17:08:10,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:10,065 INFO L225 Difference]: With dead ends: 247 [2021-01-06 17:08:10,065 INFO L226 Difference]: Without dead ends: 233 [2021-01-06 17:08:10,066 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 [2021-01-06 17:08:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-01-06 17:08:10,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 210. [2021-01-06 17:08:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2021-01-06 17:08:10,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 247 transitions. [2021-01-06 17:08:10,131 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 247 transitions. Word has length 33 [2021-01-06 17:08:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:10,131 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 247 transitions. [2021-01-06 17:08:10,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:08:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 247 transitions. [2021-01-06 17:08:10,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 17:08:10,132 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:10,132 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] [2021-01-06 17:08:10,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:08:10,347 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:10,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:10,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1979153752, now seen corresponding path program 33 times [2021-01-06 17:08:10,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:10,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817625691] [2021-01-06 17:08:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 17:08:10,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817625691] [2021-01-06 17:08:10,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633588765] [2021-01-06 17:08:10,436 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 [2021-01-06 17:08:10,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:08:10,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:10,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:08:10,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 17:08:10,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:10,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-01-06 17:08:10,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465694799] [2021-01-06 17:08:10,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:08:10,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:10,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:08:10,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:08:10,627 INFO L87 Difference]: Start difference. First operand 210 states and 247 transitions. Second operand 15 states. [2021-01-06 17:08:10,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:10,891 INFO L93 Difference]: Finished difference Result 443 states and 524 transitions. [2021-01-06 17:08:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:08:10,892 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2021-01-06 17:08:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:10,894 INFO L225 Difference]: With dead ends: 443 [2021-01-06 17:08:10,894 INFO L226 Difference]: Without dead ends: 353 [2021-01-06 17:08:10,895 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 [2021-01-06 17:08:10,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-01-06 17:08:10,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 248. [2021-01-06 17:08:10,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2021-01-06 17:08:10,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2021-01-06 17:08:10,982 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 33 [2021-01-06 17:08:10,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:10,982 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2021-01-06 17:08:10,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:08:10,982 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2021-01-06 17:08:10,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 17:08:10,983 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:10,983 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] [2021-01-06 17:08:11,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-06 17:08:11,196 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:11,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:11,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1242809295, now seen corresponding path program 34 times [2021-01-06 17:08:11,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:11,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140917870] [2021-01-06 17:08:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:08:11,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140917870] [2021-01-06 17:08:11,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226349142] [2021-01-06 17:08:11,741 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 [2021-01-06 17:08:11,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:08:11,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:11,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 17:08:11,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:12,348 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:08:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:08:12,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:12,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 35 [2021-01-06 17:08:12,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600480317] [2021-01-06 17:08:12,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 17:08:12,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:12,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 17:08:12,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 17:08:12,399 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand 35 states. [2021-01-06 17:08:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:14,402 INFO L93 Difference]: Finished difference Result 464 states and 518 transitions. [2021-01-06 17:08:14,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 17:08:14,402 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2021-01-06 17:08:14,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:14,404 INFO L225 Difference]: With dead ends: 464 [2021-01-06 17:08:14,405 INFO L226 Difference]: Without dead ends: 455 [2021-01-06 17:08:14,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=270, Invalid=3036, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 17:08:14,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-01-06 17:08:14,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 257. [2021-01-06 17:08:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2021-01-06 17:08:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 302 transitions. [2021-01-06 17:08:14,482 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 302 transitions. Word has length 34 [2021-01-06 17:08:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:14,483 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 302 transitions. [2021-01-06 17:08:14,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 17:08:14,483 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 302 transitions. [2021-01-06 17:08:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 17:08:14,484 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:14,484 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] [2021-01-06 17:08:14,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-06 17:08:14,699 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:14,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:14,700 INFO L82 PathProgramCache]: Analyzing trace with hash 489303023, now seen corresponding path program 35 times [2021-01-06 17:08:14,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:14,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662439633] [2021-01-06 17:08:14,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:08:15,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662439633] [2021-01-06 17:08:15,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574850602] [2021-01-06 17:08:15,212 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 [2021-01-06 17:08:15,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 17:08:15,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:15,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 17:08:15,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:15,773 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:08:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:08:15,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:15,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 33 [2021-01-06 17:08:15,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603393123] [2021-01-06 17:08:15,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 17:08:15,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:15,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 17:08:15,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:08:15,815 INFO L87 Difference]: Start difference. First operand 257 states and 302 transitions. Second operand 33 states. [2021-01-06 17:08:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:17,275 INFO L93 Difference]: Finished difference Result 364 states and 408 transitions. [2021-01-06 17:08:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 17:08:17,275 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 34 [2021-01-06 17:08:17,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:17,277 INFO L225 Difference]: With dead ends: 364 [2021-01-06 17:08:17,277 INFO L226 Difference]: Without dead ends: 340 [2021-01-06 17:08:17,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=246, Invalid=2510, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 17:08:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-01-06 17:08:17,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 248. [2021-01-06 17:08:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2021-01-06 17:08:17,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2021-01-06 17:08:17,333 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 34 [2021-01-06 17:08:17,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:17,333 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2021-01-06 17:08:17,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 17:08:17,334 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2021-01-06 17:08:17,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 17:08:17,334 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:17,334 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] [2021-01-06 17:08:17,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:08:17,549 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:17,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:17,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2122819938, now seen corresponding path program 36 times [2021-01-06 17:08:17,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:17,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473262851] [2021-01-06 17:08:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-01-06 17:08:17,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473262851] [2021-01-06 17:08:17,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875855149] [2021-01-06 17:08:17,704 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 [2021-01-06 17:08:17,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 17:08:17,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:17,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:08:17,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 17:08:18,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:18,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-01-06 17:08:18,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536939422] [2021-01-06 17:08:18,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:08:18,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:18,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:08:18,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:08:18,070 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand 20 states. [2021-01-06 17:08:18,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:18,979 INFO L93 Difference]: Finished difference Result 359 states and 413 transitions. [2021-01-06 17:08:18,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 17:08:18,980 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 34 [2021-01-06 17:08:18,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:18,981 INFO L225 Difference]: With dead ends: 359 [2021-01-06 17:08:18,982 INFO L226 Difference]: Without dead ends: 314 [2021-01-06 17:08:18,983 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 [2021-01-06 17:08:18,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-01-06 17:08:19,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 273. [2021-01-06 17:08:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2021-01-06 17:08:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 316 transitions. [2021-01-06 17:08:19,051 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 316 transitions. Word has length 34 [2021-01-06 17:08:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:19,052 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 316 transitions. [2021-01-06 17:08:19,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:08:19,052 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 316 transitions. [2021-01-06 17:08:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 17:08:19,052 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:19,052 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] [2021-01-06 17:08:19,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 17:08:19,261 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:19,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:19,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1302431921, now seen corresponding path program 37 times [2021-01-06 17:08:19,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:19,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988689431] [2021-01-06 17:08:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 17:08:19,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988689431] [2021-01-06 17:08:19,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401548900] [2021-01-06 17:08:19,653 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 [2021-01-06 17:08:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:19,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 17:08:19,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:20,225 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:08:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 17:08:20,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:20,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2021-01-06 17:08:20,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39522482] [2021-01-06 17:08:20,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 17:08:20,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:20,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 17:08:20,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-01-06 17:08:20,268 INFO L87 Difference]: Start difference. First operand 273 states and 316 transitions. Second operand 31 states. [2021-01-06 17:08:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:21,423 INFO L93 Difference]: Finished difference Result 352 states and 398 transitions. [2021-01-06 17:08:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 17:08:21,425 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2021-01-06 17:08:21,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:21,428 INFO L225 Difference]: With dead ends: 352 [2021-01-06 17:08:21,428 INFO L226 Difference]: Without dead ends: 327 [2021-01-06 17:08:21,429 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 [2021-01-06 17:08:21,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-01-06 17:08:21,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2021-01-06 17:08:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2021-01-06 17:08:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 315 transitions. [2021-01-06 17:08:21,511 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 315 transitions. Word has length 34 [2021-01-06 17:08:21,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:21,512 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 315 transitions. [2021-01-06 17:08:21,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 17:08:21,512 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 315 transitions. [2021-01-06 17:08:21,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 17:08:21,513 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:21,513 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] [2021-01-06 17:08:21,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:08:21,726 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:21,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:21,727 INFO L82 PathProgramCache]: Analyzing trace with hash -266355998, now seen corresponding path program 38 times [2021-01-06 17:08:21,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:21,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152056091] [2021-01-06 17:08:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-01-06 17:08:21,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152056091] [2021-01-06 17:08:21,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720185895] [2021-01-06 17:08:21,901 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 [2021-01-06 17:08:21,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:08:21,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:21,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:08:21,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 17:08:22,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:22,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-01-06 17:08:22,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796196946] [2021-01-06 17:08:22,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:08:22,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:22,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:08:22,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:08:22,279 INFO L87 Difference]: Start difference. First operand 271 states and 315 transitions. Second operand 21 states. [2021-01-06 17:08:22,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:22,805 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2021-01-06 17:08:22,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:08:22,806 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2021-01-06 17:08:22,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:22,808 INFO L225 Difference]: With dead ends: 318 [2021-01-06 17:08:22,809 INFO L226 Difference]: Without dead ends: 294 [2021-01-06 17:08:22,809 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 [2021-01-06 17:08:22,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-01-06 17:08:22,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 271. [2021-01-06 17:08:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2021-01-06 17:08:22,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 309 transitions. [2021-01-06 17:08:22,899 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 309 transitions. Word has length 34 [2021-01-06 17:08:22,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:22,900 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 309 transitions. [2021-01-06 17:08:22,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:08:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 309 transitions. [2021-01-06 17:08:22,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 17:08:22,901 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:22,901 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] [2021-01-06 17:08:23,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 17:08:23,116 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:23,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:23,116 INFO L82 PathProgramCache]: Analyzing trace with hash 535019927, now seen corresponding path program 39 times [2021-01-06 17:08:23,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:23,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801445967] [2021-01-06 17:08:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:08:23,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801445967] [2021-01-06 17:08:23,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750345303] [2021-01-06 17:08:23,408 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 [2021-01-06 17:08:23,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 17:08:23,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:23,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:08:23,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:08:24,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:24,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-01-06 17:08:24,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493218489] [2021-01-06 17:08:24,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 17:08:24,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:24,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 17:08:24,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2021-01-06 17:08:24,185 INFO L87 Difference]: Start difference. First operand 271 states and 309 transitions. Second operand 31 states. [2021-01-06 17:08:27,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:27,642 INFO L93 Difference]: Finished difference Result 470 states and 520 transitions. [2021-01-06 17:08:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 17:08:27,642 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2021-01-06 17:08:27,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:27,644 INFO L225 Difference]: With dead ends: 470 [2021-01-06 17:08:27,644 INFO L226 Difference]: Without dead ends: 434 [2021-01-06 17:08:27,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1061, Invalid=4489, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 17:08:27,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-01-06 17:08:27,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 301. [2021-01-06 17:08:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2021-01-06 17:08:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 343 transitions. [2021-01-06 17:08:27,740 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 343 transitions. Word has length 35 [2021-01-06 17:08:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:27,740 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 343 transitions. [2021-01-06 17:08:27,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 17:08:27,741 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 343 transitions. [2021-01-06 17:08:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 17:08:27,741 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:27,741 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] [2021-01-06 17:08:27,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 17:08:27,942 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:27,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:27,943 INFO L82 PathProgramCache]: Analyzing trace with hash -203006442, now seen corresponding path program 40 times [2021-01-06 17:08:27,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:27,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132880115] [2021-01-06 17:08:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:08:28,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132880115] [2021-01-06 17:08:28,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542338307] [2021-01-06 17:08:28,264 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 [2021-01-06 17:08:28,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:08:28,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:28,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:08:28,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:08:29,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:29,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-01-06 17:08:29,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655964804] [2021-01-06 17:08:29,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 17:08:29,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:29,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 17:08:29,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:08:29,086 INFO L87 Difference]: Start difference. First operand 301 states and 343 transitions. Second operand 32 states. [2021-01-06 17:08:30,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:30,495 INFO L93 Difference]: Finished difference Result 456 states and 502 transitions. [2021-01-06 17:08:30,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:08:30,496 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2021-01-06 17:08:30,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:30,498 INFO L225 Difference]: With dead ends: 456 [2021-01-06 17:08:30,498 INFO L226 Difference]: Without dead ends: 438 [2021-01-06 17:08:30,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:08:30,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-01-06 17:08:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 305. [2021-01-06 17:08:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2021-01-06 17:08:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 347 transitions. [2021-01-06 17:08:30,583 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 347 transitions. Word has length 35 [2021-01-06 17:08:30,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:30,584 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 347 transitions. [2021-01-06 17:08:30,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 17:08:30,584 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 347 transitions. [2021-01-06 17:08:30,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 17:08:30,585 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:30,585 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] [2021-01-06 17:08:30,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 17:08:30,801 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:30,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:30,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1280821844, now seen corresponding path program 41 times [2021-01-06 17:08:30,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:30,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112448821] [2021-01-06 17:08:30,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 17:08:30,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112448821] [2021-01-06 17:08:30,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352664732] [2021-01-06 17:08:30,891 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 [2021-01-06 17:08:30,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 17:08:30,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:30,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:08:30,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 17:08:31,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:31,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-01-06 17:08:31,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427232487] [2021-01-06 17:08:31,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:08:31,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:31,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:08:31,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:08:31,081 INFO L87 Difference]: Start difference. First operand 305 states and 347 transitions. Second operand 16 states. [2021-01-06 17:08:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:31,379 INFO L93 Difference]: Finished difference Result 394 states and 444 transitions. [2021-01-06 17:08:31,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:08:31,379 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2021-01-06 17:08:31,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:31,381 INFO L225 Difference]: With dead ends: 394 [2021-01-06 17:08:31,381 INFO L226 Difference]: Without dead ends: 314 [2021-01-06 17:08:31,382 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 [2021-01-06 17:08:31,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-01-06 17:08:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 291. [2021-01-06 17:08:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2021-01-06 17:08:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 329 transitions. [2021-01-06 17:08:31,487 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 329 transitions. Word has length 35 [2021-01-06 17:08:31,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:31,487 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 329 transitions. [2021-01-06 17:08:31,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:08:31,487 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 329 transitions. [2021-01-06 17:08:31,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 17:08:31,488 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:31,488 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] [2021-01-06 17:08:31,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-01-06 17:08:31,704 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:31,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:31,704 INFO L82 PathProgramCache]: Analyzing trace with hash 365909845, now seen corresponding path program 42 times [2021-01-06 17:08:31,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:31,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373438639] [2021-01-06 17:08:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 17:08:31,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373438639] [2021-01-06 17:08:31,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678050032] [2021-01-06 17:08:31,791 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 [2021-01-06 17:08:31,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 17:08:31,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:31,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:08:31,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 17:08:31,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:31,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-01-06 17:08:31,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056398500] [2021-01-06 17:08:31,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:08:31,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:31,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:08:31,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:08:31,983 INFO L87 Difference]: Start difference. First operand 291 states and 329 transitions. Second operand 16 states. [2021-01-06 17:08:32,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:32,232 INFO L93 Difference]: Finished difference Result 321 states and 356 transitions. [2021-01-06 17:08:32,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:08:32,233 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2021-01-06 17:08:32,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:32,239 INFO L225 Difference]: With dead ends: 321 [2021-01-06 17:08:32,239 INFO L226 Difference]: Without dead ends: 315 [2021-01-06 17:08:32,240 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 [2021-01-06 17:08:32,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-01-06 17:08:32,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 292. [2021-01-06 17:08:32,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2021-01-06 17:08:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2021-01-06 17:08:32,313 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 35 [2021-01-06 17:08:32,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:32,313 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2021-01-06 17:08:32,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:08:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2021-01-06 17:08:32,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 17:08:32,314 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:32,314 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] [2021-01-06 17:08:32,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:08:32,515 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:32,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:32,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1335594960, now seen corresponding path program 43 times [2021-01-06 17:08:32,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:32,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878654241] [2021-01-06 17:08:32,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:08:33,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878654241] [2021-01-06 17:08:33,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819712659] [2021-01-06 17:08:33,165 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 [2021-01-06 17:08:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:33,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 17:08:33,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:33,886 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:08:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:08:33,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:33,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 38 [2021-01-06 17:08:33,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395826281] [2021-01-06 17:08:33,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 17:08:33,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:33,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 17:08:33,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1317, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 17:08:33,940 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand 38 states. [2021-01-06 17:08:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:36,242 INFO L93 Difference]: Finished difference Result 540 states and 587 transitions. [2021-01-06 17:08:36,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 17:08:36,243 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 36 [2021-01-06 17:08:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:36,245 INFO L225 Difference]: With dead ends: 540 [2021-01-06 17:08:36,245 INFO L226 Difference]: Without dead ends: 531 [2021-01-06 17:08:36,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=289, Invalid=3617, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 17:08:36,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-01-06 17:08:36,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 301. [2021-01-06 17:08:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2021-01-06 17:08:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 340 transitions. [2021-01-06 17:08:36,324 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 340 transitions. Word has length 36 [2021-01-06 17:08:36,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:36,324 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 340 transitions. [2021-01-06 17:08:36,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 17:08:36,324 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 340 transitions. [2021-01-06 17:08:36,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 17:08:36,325 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:36,325 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] [2021-01-06 17:08:36,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-06 17:08:36,540 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:36,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:36,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1858622864, now seen corresponding path program 44 times [2021-01-06 17:08:36,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:36,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745963159] [2021-01-06 17:08:36,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:08:37,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745963159] [2021-01-06 17:08:37,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500364198] [2021-01-06 17:08:37,087 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 [2021-01-06 17:08:37,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:08:37,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:37,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 17:08:37,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:37,805 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:08:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:08:37,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:37,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 36 [2021-01-06 17:08:37,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013091859] [2021-01-06 17:08:37,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 17:08:37,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:37,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 17:08:37,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1172, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:08:37,858 INFO L87 Difference]: Start difference. First operand 301 states and 340 transitions. Second operand 36 states. [2021-01-06 17:08:39,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:39,740 INFO L93 Difference]: Finished difference Result 427 states and 465 transitions. [2021-01-06 17:08:39,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 17:08:39,740 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2021-01-06 17:08:39,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:39,742 INFO L225 Difference]: With dead ends: 427 [2021-01-06 17:08:39,742 INFO L226 Difference]: Without dead ends: 402 [2021-01-06 17:08:39,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=264, Invalid=3042, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 17:08:39,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-01-06 17:08:39,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2021-01-06 17:08:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2021-01-06 17:08:39,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2021-01-06 17:08:39,839 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 36 [2021-01-06 17:08:39,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:39,840 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2021-01-06 17:08:39,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 17:08:39,840 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2021-01-06 17:08:39,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 17:08:39,841 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:39,841 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] [2021-01-06 17:08:40,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:08:40,055 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:40,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1659359184, now seen corresponding path program 45 times [2021-01-06 17:08:40,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:40,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254496563] [2021-01-06 17:08:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 17:08:40,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254496563] [2021-01-06 17:08:40,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541067345] [2021-01-06 17:08:40,557 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 [2021-01-06 17:08:40,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:08:40,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:40,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 17:08:40,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:41,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:08:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 17:08:41,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:41,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 34 [2021-01-06 17:08:41,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162911991] [2021-01-06 17:08:41,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 17:08:41,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:41,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 17:08:41,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:08:41,322 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand 34 states. [2021-01-06 17:08:42,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:42,834 INFO L93 Difference]: Finished difference Result 352 states and 389 transitions. [2021-01-06 17:08:42,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 17:08:42,835 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 36 [2021-01-06 17:08:42,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:42,837 INFO L225 Difference]: With dead ends: 352 [2021-01-06 17:08:42,837 INFO L226 Difference]: Without dead ends: 326 [2021-01-06 17:08:42,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=258, Invalid=2604, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 17:08:42,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-01-06 17:08:42,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2021-01-06 17:08:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2021-01-06 17:08:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 318 transitions. [2021-01-06 17:08:42,912 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 318 transitions. Word has length 36 [2021-01-06 17:08:42,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:42,912 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 318 transitions. [2021-01-06 17:08:42,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 17:08:42,912 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 318 transitions. [2021-01-06 17:08:42,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 17:08:42,913 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:42,913 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] [2021-01-06 17:08:43,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-06 17:08:43,114 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:43,114 INFO L82 PathProgramCache]: Analyzing trace with hash 59566704, now seen corresponding path program 46 times [2021-01-06 17:08:43,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:43,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035509062] [2021-01-06 17:08:43,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 17:08:43,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035509062] [2021-01-06 17:08:43,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29708001] [2021-01-06 17:08:43,544 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 [2021-01-06 17:08:43,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:08:43,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:43,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 17:08:43,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:44,228 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:08:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 17:08:44,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:44,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2021-01-06 17:08:44,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841511857] [2021-01-06 17:08:44,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 17:08:44,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:44,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 17:08:44,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:08:44,277 INFO L87 Difference]: Start difference. First operand 281 states and 318 transitions. Second operand 32 states. [2021-01-06 17:08:45,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:45,462 INFO L93 Difference]: Finished difference Result 324 states and 363 transitions. [2021-01-06 17:08:45,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 17:08:45,464 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2021-01-06 17:08:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:45,465 INFO L225 Difference]: With dead ends: 324 [2021-01-06 17:08:45,465 INFO L226 Difference]: Without dead ends: 318 [2021-01-06 17:08:45,466 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 [2021-01-06 17:08:45,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-01-06 17:08:45,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 293. [2021-01-06 17:08:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2021-01-06 17:08:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 332 transitions. [2021-01-06 17:08:45,532 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 332 transitions. Word has length 36 [2021-01-06 17:08:45,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:45,532 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 332 transitions. [2021-01-06 17:08:45,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 17:08:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 332 transitions. [2021-01-06 17:08:45,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 17:08:45,533 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:45,533 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] [2021-01-06 17:08:45,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-06 17:08:45,734 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:45,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:45,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2086100650, now seen corresponding path program 47 times [2021-01-06 17:08:45,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:45,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435309850] [2021-01-06 17:08:45,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:46,113 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:08:46,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435309850] [2021-01-06 17:08:46,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837136445] [2021-01-06 17:08:46,113 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 [2021-01-06 17:08:46,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 17:08:46,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:46,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:08:46,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:08:47,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:47,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-01-06 17:08:47,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420331109] [2021-01-06 17:08:47,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 17:08:47,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:47,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 17:08:47,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 17:08:47,128 INFO L87 Difference]: Start difference. First operand 293 states and 332 transitions. Second operand 35 states. [2021-01-06 17:08:52,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:52,062 INFO L93 Difference]: Finished difference Result 520 states and 571 transitions. [2021-01-06 17:08:52,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 17:08:52,063 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2021-01-06 17:08:52,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:52,065 INFO L225 Difference]: With dead ends: 520 [2021-01-06 17:08:52,065 INFO L226 Difference]: Without dead ends: 482 [2021-01-06 17:08:52,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1504, Invalid=6506, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 17:08:52,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-01-06 17:08:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 324. [2021-01-06 17:08:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2021-01-06 17:08:52,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 367 transitions. [2021-01-06 17:08:52,157 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 367 transitions. Word has length 37 [2021-01-06 17:08:52,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:52,157 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 367 transitions. [2021-01-06 17:08:52,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 17:08:52,158 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 367 transitions. [2021-01-06 17:08:52,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 17:08:52,158 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:52,159 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] [2021-01-06 17:08:52,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:08:52,373 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:52,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:52,373 INFO L82 PathProgramCache]: Analyzing trace with hash 804885687, now seen corresponding path program 48 times [2021-01-06 17:08:52,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:52,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681735006] [2021-01-06 17:08:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:08:52,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681735006] [2021-01-06 17:08:52,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702365061] [2021-01-06 17:08:52,821 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 [2021-01-06 17:08:52,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 17:08:52,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:52,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:08:52,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:08:53,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:53,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-01-06 17:08:53,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036960736] [2021-01-06 17:08:53,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 17:08:53,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:53,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 17:08:53,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:08:53,834 INFO L87 Difference]: Start difference. First operand 324 states and 367 transitions. Second operand 36 states. [2021-01-06 17:08:55,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:55,812 INFO L93 Difference]: Finished difference Result 505 states and 552 transitions. [2021-01-06 17:08:55,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 17:08:55,813 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 37 [2021-01-06 17:08:55,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:55,814 INFO L225 Difference]: With dead ends: 505 [2021-01-06 17:08:55,814 INFO L226 Difference]: Without dead ends: 486 [2021-01-06 17:08:55,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=188, Invalid=1792, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 17:08:55,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-01-06 17:08:55,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 328. [2021-01-06 17:08:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2021-01-06 17:08:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 371 transitions. [2021-01-06 17:08:55,907 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 371 transitions. Word has length 37 [2021-01-06 17:08:55,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:55,908 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 371 transitions. [2021-01-06 17:08:55,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 17:08:55,908 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 371 transitions. [2021-01-06 17:08:55,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 17:08:55,909 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:55,909 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] [2021-01-06 17:08:56,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-06 17:08:56,124 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:56,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:56,124 INFO L82 PathProgramCache]: Analyzing trace with hash -847136075, now seen corresponding path program 49 times [2021-01-06 17:08:56,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:56,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737248898] [2021-01-06 17:08:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 17:08:56,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737248898] [2021-01-06 17:08:56,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519321957] [2021-01-06 17:08:56,246 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 [2021-01-06 17:08:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:56,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:08:56,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 17:08:56,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:56,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-01-06 17:08:56,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810406933] [2021-01-06 17:08:56,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:08:56,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:56,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:08:56,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:08:56,501 INFO L87 Difference]: Start difference. First operand 328 states and 371 transitions. Second operand 18 states. [2021-01-06 17:08:56,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:56,979 INFO L93 Difference]: Finished difference Result 404 states and 454 transitions. [2021-01-06 17:08:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 17:08:56,979 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2021-01-06 17:08:56,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:56,981 INFO L225 Difference]: With dead ends: 404 [2021-01-06 17:08:56,981 INFO L226 Difference]: Without dead ends: 389 [2021-01-06 17:08:56,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:08:56,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-01-06 17:08:57,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 356. [2021-01-06 17:08:57,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2021-01-06 17:08:57,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 408 transitions. [2021-01-06 17:08:57,067 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 408 transitions. Word has length 37 [2021-01-06 17:08:57,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:57,067 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 408 transitions. [2021-01-06 17:08:57,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:08:57,068 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 408 transitions. [2021-01-06 17:08:57,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 17:08:57,068 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:57,068 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] [2021-01-06 17:08:57,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-06 17:08:57,269 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:57,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:57,270 INFO L82 PathProgramCache]: Analyzing trace with hash 855363028, now seen corresponding path program 50 times [2021-01-06 17:08:57,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:57,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063172524] [2021-01-06 17:08:57,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 17:08:57,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063172524] [2021-01-06 17:08:57,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827242053] [2021-01-06 17:08:57,389 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 [2021-01-06 17:08:57,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:08:57,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:57,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:08:57,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 17:08:57,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:57,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-01-06 17:08:57,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475017802] [2021-01-06 17:08:57,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:08:57,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:57,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:08:57,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:08:57,651 INFO L87 Difference]: Start difference. First operand 356 states and 408 transitions. Second operand 18 states. [2021-01-06 17:08:58,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:58,156 INFO L93 Difference]: Finished difference Result 685 states and 794 transitions. [2021-01-06 17:08:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 17:08:58,157 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2021-01-06 17:08:58,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:58,159 INFO L225 Difference]: With dead ends: 685 [2021-01-06 17:08:58,159 INFO L226 Difference]: Without dead ends: 561 [2021-01-06 17:08:58,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:08:58,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-01-06 17:08:58,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 414. [2021-01-06 17:08:58,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2021-01-06 17:08:58,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2021-01-06 17:08:58,284 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 37 [2021-01-06 17:08:58,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:58,284 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2021-01-06 17:08:58,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:08:58,284 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2021-01-06 17:08:58,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 17:08:58,285 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:58,285 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] [2021-01-06 17:08:58,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-06 17:08:58,499 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:58,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:58,499 INFO L82 PathProgramCache]: Analyzing trace with hash -155710033, now seen corresponding path program 51 times [2021-01-06 17:08:58,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:58,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250847426] [2021-01-06 17:08:58,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:08:59,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250847426] [2021-01-06 17:08:59,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245067122] [2021-01-06 17:08:59,417 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 [2021-01-06 17:08:59,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 17:08:59,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:59,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 17:08:59,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:09:00,397 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:09:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:09:00,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:09:00,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 41 [2021-01-06 17:09:00,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932955751] [2021-01-06 17:09:00,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 17:09:00,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:09:00,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 17:09:00,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1544, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 17:09:00,469 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand 41 states. [2021-01-06 17:09:03,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:09:03,984 INFO L93 Difference]: Finished difference Result 761 states and 834 transitions. [2021-01-06 17:09:03,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 17:09:03,985 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 38 [2021-01-06 17:09:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:09:03,987 INFO L225 Difference]: With dead ends: 761 [2021-01-06 17:09:03,987 INFO L226 Difference]: Without dead ends: 752 [2021-01-06 17:09:03,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=308, Invalid=4248, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 17:09:03,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-01-06 17:09:04,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 423. [2021-01-06 17:09:04,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2021-01-06 17:09:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 485 transitions. [2021-01-06 17:09:04,114 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 485 transitions. Word has length 38 [2021-01-06 17:09:04,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:09:04,114 INFO L481 AbstractCegarLoop]: Abstraction has 423 states and 485 transitions. [2021-01-06 17:09:04,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 17:09:04,114 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 485 transitions. [2021-01-06 17:09:04,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 17:09:04,115 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:09:04,115 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] [2021-01-06 17:09:04,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:09:04,316 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:09:04,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:09:04,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1493827249, now seen corresponding path program 52 times [2021-01-06 17:09:04,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:09:04,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668559848] [2021-01-06 17:09:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:09:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:09:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:09:05,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668559848] [2021-01-06 17:09:05,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138995223] [2021-01-06 17:09:05,194 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 [2021-01-06 17:09:05,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:09:05,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:09:05,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 17:09:05,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:09:06,120 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:09:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:09:06,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:09:06,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 39 [2021-01-06 17:09:06,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993746299] [2021-01-06 17:09:06,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 17:09:06,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:09:06,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 17:09:06,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1387, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 17:09:06,187 INFO L87 Difference]: Start difference. First operand 423 states and 485 transitions. Second operand 39 states. [2021-01-06 17:09:09,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:09:09,078 INFO L93 Difference]: Finished difference Result 623 states and 684 transitions. [2021-01-06 17:09:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 17:09:09,079 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2021-01-06 17:09:09,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:09:09,081 INFO L225 Difference]: With dead ends: 623 [2021-01-06 17:09:09,081 INFO L226 Difference]: Without dead ends: 597 [2021-01-06 17:09:09,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=282, Invalid=3624, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 17:09:09,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-01-06 17:09:09,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 414. [2021-01-06 17:09:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2021-01-06 17:09:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2021-01-06 17:09:09,200 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 38 [2021-01-06 17:09:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:09:09,201 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2021-01-06 17:09:09,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 17:09:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2021-01-06 17:09:09,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 17:09:09,201 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:09:09,201 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] [2021-01-06 17:09:09,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:09:09,402 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:09:09,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:09:09,403 INFO L82 PathProgramCache]: Analyzing trace with hash -375561937, now seen corresponding path program 53 times [2021-01-06 17:09:09,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:09:09,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529635926] [2021-01-06 17:09:09,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:09:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:09:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 17:09:10,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529635926] [2021-01-06 17:09:10,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173670844] [2021-01-06 17:09:10,123 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 [2021-01-06 17:09:10,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 17:09:10,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:09:10,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 17:09:10,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:09:11,015 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:09:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 17:09:11,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:09:11,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 37 [2021-01-06 17:09:11,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035989545] [2021-01-06 17:09:11,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 17:09:11,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:09:11,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 17:09:11,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:09:11,073 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand 37 states. [2021-01-06 17:09:13,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:09:13,274 INFO L93 Difference]: Finished difference Result 530 states and 590 transitions. [2021-01-06 17:09:13,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 17:09:13,275 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 38 [2021-01-06 17:09:13,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:09:13,277 INFO L225 Difference]: With dead ends: 530 [2021-01-06 17:09:13,278 INFO L226 Difference]: Without dead ends: 503 [2021-01-06 17:09:13,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=276, Invalid=3146, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 17:09:13,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-01-06 17:09:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 403. [2021-01-06 17:09:13,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2021-01-06 17:09:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 463 transitions. [2021-01-06 17:09:13,416 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 463 transitions. Word has length 38 [2021-01-06 17:09:13,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:09:13,416 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 463 transitions. [2021-01-06 17:09:13,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 17:09:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 463 transitions. [2021-01-06 17:09:13,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 17:09:13,417 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:09:13,417 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] [2021-01-06 17:09:13,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:09:13,633 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:09:13,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:09:13,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1552999778, now seen corresponding path program 54 times [2021-01-06 17:09:13,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:09:13,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673954847] [2021-01-06 17:09:13,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:09:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:09:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 17:09:13,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673954847] [2021-01-06 17:09:13,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116349662] [2021-01-06 17:09:13,895 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 [2021-01-06 17:09:13,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 17:09:13,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:09:13,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:09:13,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:09:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 17:09:14,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:09:14,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-01-06 17:09:14,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336410336] [2021-01-06 17:09:14,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 17:09:14,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:09:14,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 17:09:14,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:09:14,471 INFO L87 Difference]: Start difference. First operand 403 states and 463 transitions. Second operand 24 states. [2021-01-06 17:09:16,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:09:16,399 INFO L93 Difference]: Finished difference Result 556 states and 629 transitions. [2021-01-06 17:09:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 17:09:16,400 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 38 [2021-01-06 17:09:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:09:16,402 INFO L225 Difference]: With dead ends: 556 [2021-01-06 17:09:16,402 INFO L226 Difference]: Without dead ends: 502 [2021-01-06 17:09:16,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=479, Invalid=1873, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 17:09:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-01-06 17:09:16,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 446. [2021-01-06 17:09:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 446 states. [2021-01-06 17:09:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 505 transitions. [2021-01-06 17:09:16,562 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 505 transitions. Word has length 38 [2021-01-06 17:09:16,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:09:16,562 INFO L481 AbstractCegarLoop]: Abstraction has 446 states and 505 transitions. [2021-01-06 17:09:16,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 17:09:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 505 transitions. [2021-01-06 17:09:16,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 17:09:16,563 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:09:16,564 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] [2021-01-06 17:09:16,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:09:16,770 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:09:16,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:09:16,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1465831985, now seen corresponding path program 55 times [2021-01-06 17:09:16,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:09:16,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094750381] [2021-01-06 17:09:16,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:09:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:09:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 17:09:17,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094750381] [2021-01-06 17:09:17,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532145303] [2021-01-06 17:09:17,371 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 [2021-01-06 17:09:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:09:17,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 17:09:17,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:09:18,267 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:09:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 17:09:18,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:09:18,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2021-01-06 17:09:18,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815311282] [2021-01-06 17:09:18,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 17:09:18,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:09:18,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 17:09:18,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1097, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 17:09:18,327 INFO L87 Difference]: Start difference. First operand 446 states and 505 transitions. Second operand 35 states. [2021-01-06 17:09:20,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:09:20,115 INFO L93 Difference]: Finished difference Result 532 states and 594 transitions. [2021-01-06 17:09:20,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 17:09:20,117 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2021-01-06 17:09:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:09:20,119 INFO L225 Difference]: With dead ends: 532 [2021-01-06 17:09:20,119 INFO L226 Difference]: Without dead ends: 504 [2021-01-06 17:09:20,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=270, Invalid=2700, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 17:09:20,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-01-06 17:09:20,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 443. [2021-01-06 17:09:20,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2021-01-06 17:09:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 503 transitions. [2021-01-06 17:09:20,240 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 503 transitions. Word has length 38 [2021-01-06 17:09:20,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:09:20,240 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 503 transitions. [2021-01-06 17:09:20,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 17:09:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 503 transitions. [2021-01-06 17:09:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 17:09:20,241 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:09:20,241 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] [2021-01-06 17:09:20,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-01-06 17:09:20,456 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:09:20,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:09:20,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1135200674, now seen corresponding path program 56 times [2021-01-06 17:09:20,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:09:20,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694789751] [2021-01-06 17:09:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:09:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:09:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 17:09:20,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694789751] [2021-01-06 17:09:20,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044003855] [2021-01-06 17:09:20,723 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 [2021-01-06 17:09:20,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:09:20,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:09:20,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:09:20,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:09:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 17:09:21,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:09:21,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-01-06 17:09:21,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955798944] [2021-01-06 17:09:21,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 17:09:21,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:09:21,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 17:09:21,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:09:21,308 INFO L87 Difference]: Start difference. First operand 443 states and 503 transitions. Second operand 25 states. [2021-01-06 17:09:22,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:09:22,218 INFO L93 Difference]: Finished difference Result 505 states and 561 transitions. [2021-01-06 17:09:22,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:09:22,219 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2021-01-06 17:09:22,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:09:22,221 INFO L225 Difference]: With dead ends: 505 [2021-01-06 17:09:22,221 INFO L226 Difference]: Without dead ends: 476 [2021-01-06 17:09:22,221 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 [2021-01-06 17:09:22,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-01-06 17:09:22,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 443. [2021-01-06 17:09:22,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2021-01-06 17:09:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 495 transitions. [2021-01-06 17:09:22,341 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 495 transitions. Word has length 38 [2021-01-06 17:09:22,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:09:22,341 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 495 transitions. [2021-01-06 17:09:22,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 17:09:22,342 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 495 transitions. [2021-01-06 17:09:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 17:09:22,342 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:09:22,342 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] [2021-01-06 17:09:22,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:09:22,543 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:09:22,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:09:22,544 INFO L82 PathProgramCache]: Analyzing trace with hash 130593719, now seen corresponding path program 57 times [2021-01-06 17:09:22,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:09:22,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609769092] [2021-01-06 17:09:22,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:09:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:09:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:09:23,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609769092] [2021-01-06 17:09:23,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811653659] [2021-01-06 17:09:23,077 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 [2021-01-06 17:09:23,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 17:09:23,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:09:23,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:09:23,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:09:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:09:24,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:09:24,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-01-06 17:09:24,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910068226] [2021-01-06 17:09:24,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 17:09:24,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:09:24,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 17:09:24,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 17:09:24,507 INFO L87 Difference]: Start difference. First operand 443 states and 495 transitions. Second operand 39 states. [2021-01-06 17:09:32,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:09:32,171 INFO L93 Difference]: Finished difference Result 768 states and 835 transitions. [2021-01-06 17:09:32,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 17:09:32,173 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2021-01-06 17:09:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:09:32,176 INFO L225 Difference]: With dead ends: 768 [2021-01-06 17:09:32,176 INFO L226 Difference]: Without dead ends: 726 [2021-01-06 17:09:32,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2060, Invalid=9070, Unknown=0, NotChecked=0, Total=11130 [2021-01-06 17:09:32,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-01-06 17:09:32,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 490. [2021-01-06 17:09:32,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2021-01-06 17:09:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 547 transitions. [2021-01-06 17:09:32,319 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 547 transitions. Word has length 39 [2021-01-06 17:09:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:09:32,319 INFO L481 AbstractCegarLoop]: Abstraction has 490 states and 547 transitions. [2021-01-06 17:09:32,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 17:09:32,319 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 547 transitions. [2021-01-06 17:09:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 17:09:32,320 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:09:32,320 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] [2021-01-06 17:09:32,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-06 17:09:32,530 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:09:32,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:09:32,530 INFO L82 PathProgramCache]: Analyzing trace with hash -443143050, now seen corresponding path program 58 times [2021-01-06 17:09:32,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:09:32,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073104635] [2021-01-06 17:09:32,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:09:32,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:09:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:09:33,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073104635] [2021-01-06 17:09:33,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002992119] [2021-01-06 17:09:33,134 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 [2021-01-06 17:09:33,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:09:33,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:09:33,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:09:33,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:09:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:09:34,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:09:34,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-01-06 17:09:34,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556113003] [2021-01-06 17:09:34,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 17:09:34,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:09:34,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 17:09:34,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:09:34,683 INFO L87 Difference]: Start difference. First operand 490 states and 547 transitions. Second operand 40 states. [2021-01-06 17:09:37,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:09:37,584 INFO L93 Difference]: Finished difference Result 752 states and 814 transitions. [2021-01-06 17:09:37,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 17:09:37,586 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2021-01-06 17:09:37,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:09:37,589 INFO L225 Difference]: With dead ends: 752 [2021-01-06 17:09:37,589 INFO L226 Difference]: Without dead ends: 731 [2021-01-06 17:09:37,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=215, Invalid=2235, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 17:09:37,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-01-06 17:09:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 495. [2021-01-06 17:09:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2021-01-06 17:09:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 552 transitions. [2021-01-06 17:09:37,735 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 552 transitions. Word has length 39 [2021-01-06 17:09:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:09:37,735 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 552 transitions. [2021-01-06 17:09:37,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 17:09:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 552 transitions. [2021-01-06 17:09:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 17:09:37,736 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:09:37,736 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] [2021-01-06 17:09:37,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:09:37,938 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:09:37,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:09:37,938 INFO L82 PathProgramCache]: Analyzing trace with hash -24932840, now seen corresponding path program 59 times [2021-01-06 17:09:37,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:09:37,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864964307] [2021-01-06 17:09:37,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:09:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:09:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 17:09:38,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864964307] [2021-01-06 17:09:38,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770713606] [2021-01-06 17:09:38,090 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 [2021-01-06 17:09:38,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 17:09:38,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:09:38,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 17:09:38,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:09:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 17:09:38,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:09:38,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-01-06 17:09:38,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320391487] [2021-01-06 17:09:38,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:09:38,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:09:38,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:09:38,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:09:38,366 INFO L87 Difference]: Start difference. First operand 495 states and 552 transitions. Second operand 19 states. [2021-01-06 17:09:38,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:09:38,953 INFO L93 Difference]: Finished difference Result 622 states and 690 transitions. [2021-01-06 17:09:38,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 17:09:38,955 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2021-01-06 17:09:38,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:09:38,956 INFO L225 Difference]: With dead ends: 622 [2021-01-06 17:09:38,956 INFO L226 Difference]: Without dead ends: 514 [2021-01-06 17:09:38,957 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 [2021-01-06 17:09:38,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-01-06 17:09:39,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 481. [2021-01-06 17:09:39,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2021-01-06 17:09:39,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 534 transitions. [2021-01-06 17:09:39,097 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 534 transitions. Word has length 39 [2021-01-06 17:09:39,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:09:39,097 INFO L481 AbstractCegarLoop]: Abstraction has 481 states and 534 transitions. [2021-01-06 17:09:39,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:09:39,097 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 534 transitions. [2021-01-06 17:09:39,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 17:09:39,098 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:09:39,098 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] [2021-01-06 17:09:39,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-06 17:09:39,299 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:09:39,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:09:39,299 INFO L82 PathProgramCache]: Analyzing trace with hash -601397259, now seen corresponding path program 60 times [2021-01-06 17:09:39,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:09:39,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447520948] [2021-01-06 17:09:39,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:09:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:09:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 17:09:39,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447520948] [2021-01-06 17:09:39,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620019033] [2021-01-06 17:09:39,462 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 [2021-01-06 17:09:39,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 17:09:39,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:09:39,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 17:09:39,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:09:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 17:09:39,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:09:39,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-01-06 17:09:39,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210391634] [2021-01-06 17:09:39,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:09:39,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:09:39,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:09:39,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:09:39,736 INFO L87 Difference]: Start difference. First operand 481 states and 534 transitions. Second operand 19 states. [2021-01-06 17:09:40,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:09:40,273 INFO L93 Difference]: Finished difference Result 521 states and 570 transitions. [2021-01-06 17:09:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 17:09:40,274 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2021-01-06 17:09:40,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:09:40,276 INFO L225 Difference]: With dead ends: 521 [2021-01-06 17:09:40,276 INFO L226 Difference]: Without dead ends: 515 [2021-01-06 17:09:40,276 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 [2021-01-06 17:09:40,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-01-06 17:09:40,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 482. [2021-01-06 17:09:40,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2021-01-06 17:09:40,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2021-01-06 17:09:40,409 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 39 [2021-01-06 17:09:40,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:09:40,409 INFO L481 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2021-01-06 17:09:40,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:09:40,409 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2021-01-06 17:09:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 17:09:40,410 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:09:40,410 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] [2021-01-06 17:09:40,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:09:40,611 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:09:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:09:40,611 INFO L82 PathProgramCache]: Analyzing trace with hash -189895216, now seen corresponding path program 61 times [2021-01-06 17:09:40,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:09:40,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217366424] [2021-01-06 17:09:40,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:09:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:09:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:09:41,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217366424] [2021-01-06 17:09:41,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045921479] [2021-01-06 17:09:41,717 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 [2021-01-06 17:09:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:09:41,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 62 conjunts are in the unsatisfiable core [2021-01-06 17:09:41,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:09:42,908 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:09:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:09:42,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:09:42,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 44 [2021-01-06 17:09:42,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190303416] [2021-01-06 17:09:42,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 17:09:42,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:09:42,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 17:09:42,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1789, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 17:09:42,988 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand 44 states. [2021-01-06 17:09:47,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:09:47,503 INFO L93 Difference]: Finished difference Result 872 states and 936 transitions. [2021-01-06 17:09:47,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 17:09:47,504 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 40 [2021-01-06 17:09:47,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:09:47,508 INFO L225 Difference]: With dead ends: 872 [2021-01-06 17:09:47,508 INFO L226 Difference]: Without dead ends: 863 [2021-01-06 17:09:47,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=327, Invalid=4929, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 17:09:47,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-01-06 17:09:47,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 491. [2021-01-06 17:09:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2021-01-06 17:09:47,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 545 transitions. [2021-01-06 17:09:47,652 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 545 transitions. Word has length 40 [2021-01-06 17:09:47,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:09:47,652 INFO L481 AbstractCegarLoop]: Abstraction has 491 states and 545 transitions. [2021-01-06 17:09:47,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 17:09:47,652 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 545 transitions. [2021-01-06 17:09:47,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 17:09:47,653 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:09:47,653 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] [2021-01-06 17:09:47,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:09:47,861 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:09:47,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:09:47,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1171113072, now seen corresponding path program 62 times [2021-01-06 17:09:47,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:09:47,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560185556] [2021-01-06 17:09:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:09:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:09:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:09:48,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560185556] [2021-01-06 17:09:48,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424409898] [2021-01-06 17:09:48,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-06 17:09:48,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:09:48,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:09:48,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 17:09:48,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:09:50,057 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:09:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:09:50,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:09:50,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 42 [2021-01-06 17:09:50,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235118491] [2021-01-06 17:09:50,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 17:09:50,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:09:50,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 17:09:50,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1620, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 17:09:50,133 INFO L87 Difference]: Start difference. First operand 491 states and 545 transitions. Second operand 42 states. [2021-01-06 17:09:53,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:09:53,843 INFO L93 Difference]: Finished difference Result 719 states and 772 transitions. [2021-01-06 17:09:53,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 17:09:53,844 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 40 [2021-01-06 17:09:53,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:09:53,847 INFO L225 Difference]: With dead ends: 719 [2021-01-06 17:09:53,847 INFO L226 Difference]: Without dead ends: 692 [2021-01-06 17:09:53,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=300, Invalid=4256, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 17:09:53,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-01-06 17:09:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 482. [2021-01-06 17:09:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2021-01-06 17:09:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2021-01-06 17:09:53,983 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 40 [2021-01-06 17:09:53,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:09:53,983 INFO L481 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2021-01-06 17:09:53,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 17:09:53,983 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2021-01-06 17:09:53,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 17:09:53,984 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:09:53,984 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] [2021-01-06 17:09:54,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-01-06 17:09:54,185 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:09:54,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:09:54,186 INFO L82 PathProgramCache]: Analyzing trace with hash 722054608, now seen corresponding path program 63 times [2021-01-06 17:09:54,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:09:54,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776088228] [2021-01-06 17:09:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:09:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:09:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 17:09:55,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776088228] [2021-01-06 17:09:55,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591877884] [2021-01-06 17:09:55,084 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 [2021-01-06 17:09:55,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 17:09:55,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:09:55,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 17:09:55,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:09:56,246 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:09:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 17:09:56,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:09:56,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 40 [2021-01-06 17:09:56,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087324017] [2021-01-06 17:09:56,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 17:09:56,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:09:56,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 17:09:56,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1459, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:09:56,319 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand 40 states. [2021-01-06 17:09:59,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:09:59,259 INFO L93 Difference]: Finished difference Result 617 states and 669 transitions. [2021-01-06 17:09:59,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 17:09:59,260 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2021-01-06 17:09:59,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:09:59,262 INFO L225 Difference]: With dead ends: 617 [2021-01-06 17:09:59,262 INFO L226 Difference]: Without dead ends: 589 [2021-01-06 17:09:59,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=294, Invalid=3738, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 17:09:59,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-01-06 17:09:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 471. [2021-01-06 17:09:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2021-01-06 17:09:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 523 transitions. [2021-01-06 17:09:59,404 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 523 transitions. Word has length 40 [2021-01-06 17:09:59,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:09:59,405 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 523 transitions. [2021-01-06 17:09:59,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 17:09:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 523 transitions. [2021-01-06 17:09:59,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 17:09:59,405 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:09:59,405 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] [2021-01-06 17:09:59,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:09:59,606 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:09:59,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:09:59,607 INFO L82 PathProgramCache]: Analyzing trace with hash -923927664, now seen corresponding path program 64 times [2021-01-06 17:09:59,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:09:59,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529502588] [2021-01-06 17:09:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:09:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:10:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 17:10:00,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529502588] [2021-01-06 17:10:00,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444497214] [2021-01-06 17:10:00,383 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 [2021-01-06 17:10:00,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:10:00,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:10:00,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 17:10:00,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:10:01,494 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:10:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 17:10:01,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:10:01,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 38 [2021-01-06 17:10:01,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536958679] [2021-01-06 17:10:01,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 17:10:01,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:10:01,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 17:10:01,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 17:10:01,561 INFO L87 Difference]: Start difference. First operand 471 states and 523 transitions. Second operand 38 states. [2021-01-06 17:10:04,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:10:04,072 INFO L93 Difference]: Finished difference Result 535 states and 586 transitions. [2021-01-06 17:10:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 17:10:04,073 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 40 [2021-01-06 17:10:04,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:10:04,076 INFO L225 Difference]: With dead ends: 535 [2021-01-06 17:10:04,076 INFO L226 Difference]: Without dead ends: 506 [2021-01-06 17:10:04,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=288, Invalid=3252, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 17:10:04,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-01-06 17:10:04,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 458. [2021-01-06 17:10:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2021-01-06 17:10:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 509 transitions. [2021-01-06 17:10:04,211 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 509 transitions. Word has length 40 [2021-01-06 17:10:04,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:10:04,211 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 509 transitions. [2021-01-06 17:10:04,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 17:10:04,211 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 509 transitions. [2021-01-06 17:10:04,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 17:10:04,212 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:10:04,212 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] [2021-01-06 17:10:04,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:10:04,414 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:10:04,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:10:04,415 INFO L82 PathProgramCache]: Analyzing trace with hash 137817552, now seen corresponding path program 65 times [2021-01-06 17:10:04,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:10:04,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607860994] [2021-01-06 17:10:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:10:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:10:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 17:10:05,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607860994] [2021-01-06 17:10:05,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355583383] [2021-01-06 17:10:05,099 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 [2021-01-06 17:10:05,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 17:10:05,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:10:05,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 17:10:05,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:10:06,153 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:10:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 17:10:06,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:10:06,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 36 [2021-01-06 17:10:06,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712743977] [2021-01-06 17:10:06,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 17:10:06,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:10:06,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 17:10:06,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1161, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:10:06,217 INFO L87 Difference]: Start difference. First operand 458 states and 509 transitions. Second operand 36 states. [2021-01-06 17:10:08,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:10:08,045 INFO L93 Difference]: Finished difference Result 504 states and 557 transitions. [2021-01-06 17:10:08,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 17:10:08,047 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2021-01-06 17:10:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:10:08,050 INFO L225 Difference]: With dead ends: 504 [2021-01-06 17:10:08,050 INFO L226 Difference]: Without dead ends: 498 [2021-01-06 17:10:08,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=282, Invalid=2798, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 17:10:08,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-01-06 17:10:08,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 471. [2021-01-06 17:10:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2021-01-06 17:10:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 524 transitions. [2021-01-06 17:10:08,192 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 524 transitions. Word has length 40 [2021-01-06 17:10:08,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:10:08,192 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 524 transitions. [2021-01-06 17:10:08,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 17:10:08,192 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 524 transitions. [2021-01-06 17:10:08,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 17:10:08,193 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:10:08,193 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] [2021-01-06 17:10:08,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-01-06 17:10:08,400 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:10:08,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:10:08,401 INFO L82 PathProgramCache]: Analyzing trace with hash -929146954, now seen corresponding path program 66 times [2021-01-06 17:10:08,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:10:08,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933705226] [2021-01-06 17:10:08,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:10:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:10:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:10:09,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933705226] [2021-01-06 17:10:09,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495477364] [2021-01-06 17:10:09,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-06 17:10:09,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 17:10:09,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:10:09,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 17:10:09,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:10:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:10:10,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:10:10,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2021-01-06 17:10:10,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859964657] [2021-01-06 17:10:10,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 17:10:10,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:10:10,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 17:10:10,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1703, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 17:10:10,879 INFO L87 Difference]: Start difference. First operand 471 states and 524 transitions. Second operand 43 states. [2021-01-06 17:10:15,882 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 25 [2021-01-06 17:10:18,028 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 28 [2021-01-06 17:10:21,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:10:21,003 INFO L93 Difference]: Finished difference Result 834 states and 902 transitions. [2021-01-06 17:10:21,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-01-06 17:10:21,005 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 41 [2021-01-06 17:10:21,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:10:21,008 INFO L225 Difference]: With dead ends: 834 [2021-01-06 17:10:21,009 INFO L226 Difference]: Without dead ends: 790 [2021-01-06 17:10:21,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3195 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=2745, Invalid=12261, Unknown=0, NotChecked=0, Total=15006 [2021-01-06 17:10:21,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-01-06 17:10:21,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 519. [2021-01-06 17:10:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2021-01-06 17:10:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 577 transitions. [2021-01-06 17:10:21,167 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 577 transitions. Word has length 41 [2021-01-06 17:10:21,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:10:21,167 INFO L481 AbstractCegarLoop]: Abstraction has 519 states and 577 transitions. [2021-01-06 17:10:21,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 17:10:21,167 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 577 transitions. [2021-01-06 17:10:21,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 17:10:21,168 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:10:21,168 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] [2021-01-06 17:10:21,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:10:21,368 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:10:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:10:21,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1535117609, now seen corresponding path program 67 times [2021-01-06 17:10:21,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:10:21,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510153995] [2021-01-06 17:10:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:10:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:10:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:10:22,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510153995] [2021-01-06 17:10:22,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56878602] [2021-01-06 17:10:22,159 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 [2021-01-06 17:10:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:10:22,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 17:10:22,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:10:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:10:24,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:10:24,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 44 [2021-01-06 17:10:24,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52964026] [2021-01-06 17:10:24,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 17:10:24,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:10:24,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 17:10:24,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 17:10:24,056 INFO L87 Difference]: Start difference. First operand 519 states and 577 transitions. Second operand 44 states. [2021-01-06 17:10:27,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:10:27,901 INFO L93 Difference]: Finished difference Result 817 states and 880 transitions. [2021-01-06 17:10:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 17:10:27,903 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 41 [2021-01-06 17:10:27,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:10:27,906 INFO L225 Difference]: With dead ends: 817 [2021-01-06 17:10:27,906 INFO L226 Difference]: Without dead ends: 795 [2021-01-06 17:10:27,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=243, Invalid=2727, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 17:10:27,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-01-06 17:10:28,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 524. [2021-01-06 17:10:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2021-01-06 17:10:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 582 transitions. [2021-01-06 17:10:28,070 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 582 transitions. Word has length 41 [2021-01-06 17:10:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:10:28,070 INFO L481 AbstractCegarLoop]: Abstraction has 524 states and 582 transitions. [2021-01-06 17:10:28,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 17:10:28,070 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 582 transitions. [2021-01-06 17:10:28,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 17:10:28,071 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:10:28,071 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] [2021-01-06 17:10:28,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-01-06 17:10:28,272 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:10:28,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:10:28,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1578640213, now seen corresponding path program 68 times [2021-01-06 17:10:28,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:10:28,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270691602] [2021-01-06 17:10:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:10:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:10:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 17:10:28,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270691602] [2021-01-06 17:10:28,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784074256] [2021-01-06 17:10:28,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-06 17:10:28,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:10:28,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:10:28,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:10:28,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:10:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 17:10:28,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:10:28,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-01-06 17:10:28,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458812893] [2021-01-06 17:10:28,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:10:28,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:10:28,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:10:28,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:10:28,853 INFO L87 Difference]: Start difference. First operand 524 states and 582 transitions. Second operand 21 states. [2021-01-06 17:10:29,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:10:29,721 INFO L93 Difference]: Finished difference Result 618 states and 684 transitions. [2021-01-06 17:10:29,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 17:10:29,722 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2021-01-06 17:10:29,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:10:29,725 INFO L225 Difference]: With dead ends: 618 [2021-01-06 17:10:29,725 INFO L226 Difference]: Without dead ends: 602 [2021-01-06 17:10:29,726 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 [2021-01-06 17:10:29,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-01-06 17:10:29,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 558. [2021-01-06 17:10:29,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2021-01-06 17:10:29,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 627 transitions. [2021-01-06 17:10:29,904 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 627 transitions. Word has length 41 [2021-01-06 17:10:29,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:10:29,904 INFO L481 AbstractCegarLoop]: Abstraction has 558 states and 627 transitions. [2021-01-06 17:10:29,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:10:29,904 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 627 transitions. [2021-01-06 17:10:29,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 17:10:29,905 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:10:29,905 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] [2021-01-06 17:10:30,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-06 17:10:30,106 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:10:30,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:10:30,108 INFO L82 PathProgramCache]: Analyzing trace with hash 888112408, now seen corresponding path program 69 times [2021-01-06 17:10:30,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:10:30,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414016914] [2021-01-06 17:10:30,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:10:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:10:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 17:10:30,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414016914] [2021-01-06 17:10:30,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058301960] [2021-01-06 17:10:30,293 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 [2021-01-06 17:10:30,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 17:10:30,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:10:30,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:10:30,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:10:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 17:10:30,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:10:30,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-01-06 17:10:30,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977998746] [2021-01-06 17:10:30,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:10:30,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:10:30,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:10:30,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:10:30,702 INFO L87 Difference]: Start difference. First operand 558 states and 627 transitions. Second operand 21 states. [2021-01-06 17:10:31,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:10:31,691 INFO L93 Difference]: Finished difference Result 996 states and 1135 transitions. [2021-01-06 17:10:31,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 17:10:31,692 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2021-01-06 17:10:31,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:10:31,695 INFO L225 Difference]: With dead ends: 996 [2021-01-06 17:10:31,695 INFO L226 Difference]: Without dead ends: 834 [2021-01-06 17:10:31,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 17:10:31,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-01-06 17:10:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 640. [2021-01-06 17:10:31,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2021-01-06 17:10:31,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2021-01-06 17:10:31,906 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 41 [2021-01-06 17:10:31,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:10:31,907 INFO L481 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2021-01-06 17:10:31,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:10:31,907 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2021-01-06 17:10:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:10:31,908 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:10:31,908 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] [2021-01-06 17:10:32,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-06 17:10:32,109 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:10:32,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:10:32,109 INFO L82 PathProgramCache]: Analyzing trace with hash 318631823, now seen corresponding path program 70 times [2021-01-06 17:10:32,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:10:32,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93327178] [2021-01-06 17:10:32,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:10:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:10:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:10:33,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93327178] [2021-01-06 17:10:33,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887944263] [2021-01-06 17:10:33,560 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 [2021-01-06 17:10:33,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:10:33,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:10:33,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 66 conjunts are in the unsatisfiable core [2021-01-06 17:10:33,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:10:35,076 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:10:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:10:35,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:10:35,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 47 [2021-01-06 17:10:35,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074640697] [2021-01-06 17:10:35,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 17:10:35,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:10:35,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 17:10:35,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2052, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 17:10:35,171 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand 47 states. [2021-01-06 17:10:40,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:10:40,506 INFO L93 Difference]: Finished difference Result 1165 states and 1259 transitions. [2021-01-06 17:10:40,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 17:10:40,507 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 42 [2021-01-06 17:10:40,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:10:40,512 INFO L225 Difference]: With dead ends: 1165 [2021-01-06 17:10:40,512 INFO L226 Difference]: Without dead ends: 1156 [2021-01-06 17:10:40,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=346, Invalid=5660, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 17:10:40,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-01-06 17:10:40,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 649. [2021-01-06 17:10:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2021-01-06 17:10:40,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 730 transitions. [2021-01-06 17:10:40,717 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 730 transitions. Word has length 42 [2021-01-06 17:10:40,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:10:40,718 INFO L481 AbstractCegarLoop]: Abstraction has 649 states and 730 transitions. [2021-01-06 17:10:40,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 17:10:40,718 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 730 transitions. [2021-01-06 17:10:40,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:10:40,719 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:10:40,719 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] [2021-01-06 17:10:40,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:10:40,919 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:10:40,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:10:40,920 INFO L82 PathProgramCache]: Analyzing trace with hash -225136977, now seen corresponding path program 71 times [2021-01-06 17:10:40,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:10:40,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893852617] [2021-01-06 17:10:40,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:10:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:10:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:10:42,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893852617] [2021-01-06 17:10:42,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135796153] [2021-01-06 17:10:42,223 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 [2021-01-06 17:10:42,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 17:10:42,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:10:42,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 62 conjunts are in the unsatisfiable core [2021-01-06 17:10:42,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:10:43,714 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:10:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:10:43,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:10:43,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 45 [2021-01-06 17:10:43,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982827403] [2021-01-06 17:10:43,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 17:10:43,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:10:43,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 17:10:43,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1871, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 17:10:43,804 INFO L87 Difference]: Start difference. First operand 649 states and 730 transitions. Second operand 45 states. [2021-01-06 17:10:48,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:10:48,624 INFO L93 Difference]: Finished difference Result 983 states and 1063 transitions. [2021-01-06 17:10:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 17:10:48,626 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 42 [2021-01-06 17:10:48,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:10:48,629 INFO L225 Difference]: With dead ends: 983 [2021-01-06 17:10:48,629 INFO L226 Difference]: Without dead ends: 955 [2021-01-06 17:10:48,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=318, Invalid=4938, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 17:10:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-01-06 17:10:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 640. [2021-01-06 17:10:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2021-01-06 17:10:48,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2021-01-06 17:10:48,839 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 42 [2021-01-06 17:10:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:10:48,839 INFO L481 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2021-01-06 17:10:48,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 17:10:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2021-01-06 17:10:48,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:10:48,840 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:10:48,840 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] [2021-01-06 17:10:49,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:10:49,041 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:10:49,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:10:49,042 INFO L82 PathProgramCache]: Analyzing trace with hash -284040433, now seen corresponding path program 72 times [2021-01-06 17:10:49,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:10:49,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611574226] [2021-01-06 17:10:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:10:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:10:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 17:10:50,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611574226] [2021-01-06 17:10:50,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6469049] [2021-01-06 17:10:50,182 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 [2021-01-06 17:10:50,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 17:10:50,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:10:50,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 17:10:50,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:10:51,638 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:10:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 17:10:51,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:10:51,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 43 [2021-01-06 17:10:51,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929193328] [2021-01-06 17:10:51,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 17:10:51,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:10:51,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 17:10:51,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1698, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 17:10:51,736 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand 43 states. [2021-01-06 17:10:55,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:10:55,539 INFO L93 Difference]: Finished difference Result 853 states and 932 transitions. [2021-01-06 17:10:55,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 17:10:55,540 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2021-01-06 17:10:55,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:10:55,544 INFO L225 Difference]: With dead ends: 853 [2021-01-06 17:10:55,544 INFO L226 Difference]: Without dead ends: 824 [2021-01-06 17:10:55,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=312, Invalid=4380, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 17:10:55,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-01-06 17:10:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 629. [2021-01-06 17:10:55,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2021-01-06 17:10:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 708 transitions. [2021-01-06 17:10:55,762 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 708 transitions. Word has length 42 [2021-01-06 17:10:55,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:10:55,762 INFO L481 AbstractCegarLoop]: Abstraction has 629 states and 708 transitions. [2021-01-06 17:10:55,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 17:10:55,762 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 708 transitions. [2021-01-06 17:10:55,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:10:55,763 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:10:55,763 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] [2021-01-06 17:10:55,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:10:55,964 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:10:55,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:10:55,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2122368209, now seen corresponding path program 73 times [2021-01-06 17:10:55,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:10:55,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121583430] [2021-01-06 17:10:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:10:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:10:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 17:10:57,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121583430] [2021-01-06 17:10:57,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683691899] [2021-01-06 17:10:57,055 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 [2021-01-06 17:10:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:10:57,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 17:10:57,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:10:58,477 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:10:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 17:10:58,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:10:58,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 41 [2021-01-06 17:10:58,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858075662] [2021-01-06 17:10:58,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 17:10:58,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:10:58,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 17:10:58,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1533, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 17:10:58,559 INFO L87 Difference]: Start difference. First operand 629 states and 708 transitions. Second operand 41 states. [2021-01-06 17:11:01,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:01,836 INFO L93 Difference]: Finished difference Result 754 states and 832 transitions. [2021-01-06 17:11:01,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 17:11:01,837 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 42 [2021-01-06 17:11:01,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:01,841 INFO L225 Difference]: With dead ends: 754 [2021-01-06 17:11:01,841 INFO L226 Difference]: Without dead ends: 724 [2021-01-06 17:11:01,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=306, Invalid=3854, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 17:11:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-01-06 17:11:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 616. [2021-01-06 17:11:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2021-01-06 17:11:02,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 694 transitions. [2021-01-06 17:11:02,045 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 694 transitions. Word has length 42 [2021-01-06 17:11:02,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:02,045 INFO L481 AbstractCegarLoop]: Abstraction has 616 states and 694 transitions. [2021-01-06 17:11:02,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 17:11:02,045 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 694 transitions. [2021-01-06 17:11:02,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:11:02,046 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:02,046 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] [2021-01-06 17:11:02,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:02,255 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:02,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:02,256 INFO L82 PathProgramCache]: Analyzing trace with hash -147720610, now seen corresponding path program 74 times [2021-01-06 17:11:02,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:02,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484901265] [2021-01-06 17:11:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 17:11:02,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484901265] [2021-01-06 17:11:02,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73141386] [2021-01-06 17:11:02,709 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 [2021-01-06 17:11:02,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:11:02,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:11:02,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:11:02,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-01-06 17:11:03,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:11:03,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-01-06 17:11:03,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761993822] [2021-01-06 17:11:03,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 17:11:03,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:03,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 17:11:03,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:11:03,652 INFO L87 Difference]: Start difference. First operand 616 states and 694 transitions. Second operand 28 states. [2021-01-06 17:11:07,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:07,143 INFO L93 Difference]: Finished difference Result 816 states and 910 transitions. [2021-01-06 17:11:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 17:11:07,145 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 42 [2021-01-06 17:11:07,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:07,150 INFO L225 Difference]: With dead ends: 816 [2021-01-06 17:11:07,150 INFO L226 Difference]: Without dead ends: 753 [2021-01-06 17:11:07,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=748, Invalid=3034, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 17:11:07,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-01-06 17:11:07,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 681. [2021-01-06 17:11:07,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2021-01-06 17:11:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 758 transitions. [2021-01-06 17:11:07,374 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 758 transitions. Word has length 42 [2021-01-06 17:11:07,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:07,374 INFO L481 AbstractCegarLoop]: Abstraction has 681 states and 758 transitions. [2021-01-06 17:11:07,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 17:11:07,374 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 758 transitions. [2021-01-06 17:11:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:11:07,375 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:07,375 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] [2021-01-06 17:11:07,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-01-06 17:11:07,576 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:07,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:07,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1018615439, now seen corresponding path program 75 times [2021-01-06 17:11:07,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:07,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540074453] [2021-01-06 17:11:07,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 17:11:08,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540074453] [2021-01-06 17:11:08,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765503808] [2021-01-06 17:11:08,534 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 [2021-01-06 17:11:08,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 17:11:08,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:11:08,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 17:11:08,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:09,907 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:11:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 17:11:09,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:11:09,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 39 [2021-01-06 17:11:09,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061839907] [2021-01-06 17:11:09,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 17:11:09,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:09,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 17:11:09,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 17:11:09,999 INFO L87 Difference]: Start difference. First operand 681 states and 758 transitions. Second operand 39 states. [2021-01-06 17:11:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:12,878 INFO L93 Difference]: Finished difference Result 774 states and 854 transitions. [2021-01-06 17:11:12,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 17:11:12,880 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2021-01-06 17:11:12,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:12,884 INFO L225 Difference]: With dead ends: 774 [2021-01-06 17:11:12,884 INFO L226 Difference]: Without dead ends: 743 [2021-01-06 17:11:12,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=300, Invalid=3360, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 17:11:12,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-01-06 17:11:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 677. [2021-01-06 17:11:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2021-01-06 17:11:13,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 755 transitions. [2021-01-06 17:11:13,144 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 755 transitions. Word has length 42 [2021-01-06 17:11:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:13,144 INFO L481 AbstractCegarLoop]: Abstraction has 677 states and 755 transitions. [2021-01-06 17:11:13,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 17:11:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 755 transitions. [2021-01-06 17:11:13,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:11:13,146 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:13,146 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] [2021-01-06 17:11:13,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:13,347 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:13,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:13,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1114544290, now seen corresponding path program 76 times [2021-01-06 17:11:13,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:13,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666160001] [2021-01-06 17:11:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 17:11:13,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666160001] [2021-01-06 17:11:13,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710547525] [2021-01-06 17:11:13,796 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 [2021-01-06 17:11:13,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:11:13,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:11:13,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:11:13,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-01-06 17:11:14,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:11:14,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-01-06 17:11:14,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063928294] [2021-01-06 17:11:14,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 17:11:14,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:14,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 17:11:14,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:11:14,759 INFO L87 Difference]: Start difference. First operand 677 states and 755 transitions. Second operand 29 states. [2021-01-06 17:11:16,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:16,693 INFO L93 Difference]: Finished difference Result 755 states and 828 transitions. [2021-01-06 17:11:16,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:11:16,696 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 42 [2021-01-06 17:11:16,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:16,705 INFO L225 Difference]: With dead ends: 755 [2021-01-06 17:11:16,706 INFO L226 Difference]: Without dead ends: 721 [2021-01-06 17:11:16,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:11:16,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-01-06 17:11:16,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 677. [2021-01-06 17:11:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2021-01-06 17:11:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 745 transitions. [2021-01-06 17:11:16,972 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 745 transitions. Word has length 42 [2021-01-06 17:11:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:16,972 INFO L481 AbstractCegarLoop]: Abstraction has 677 states and 745 transitions. [2021-01-06 17:11:16,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 17:11:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 745 transitions. [2021-01-06 17:11:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 17:11:16,974 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:16,974 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] [2021-01-06 17:11:17,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:17,188 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:17,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:17,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1950289367, now seen corresponding path program 77 times [2021-01-06 17:11:17,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:17,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903707195] [2021-01-06 17:11:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:11:18,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903707195] [2021-01-06 17:11:18,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356074537] [2021-01-06 17:11:18,193 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 [2021-01-06 17:11:18,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 17:11:18,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:11:18,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 17:11:18,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:11:20,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:11:20,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2021-01-06 17:11:20,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355733499] [2021-01-06 17:11:20,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 17:11:20,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:20,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 17:11:20,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 17:11:20,667 INFO L87 Difference]: Start difference. First operand 677 states and 745 transitions. Second operand 47 states. [2021-01-06 17:11:28,583 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 25 [2021-01-06 17:11:31,518 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 28 [2021-01-06 17:11:31,908 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 28