/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/float-benchs/rlim_exit.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:07:14,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:07:14,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:07:14,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:07:14,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:07:14,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:07:14,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:07:14,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:07:14,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:07:14,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:07:14,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:07:14,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:07:14,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:07:14,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:07:14,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:07:14,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:07:14,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:07:14,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:07:14,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:07:14,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:07:14,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:07:14,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:07:14,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:07:14,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:07:14,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:07:14,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:07:14,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:07:14,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:07:14,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:07:14,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:07:14,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:07:14,955 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:07:14,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:07:14,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:07:14,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:07:14,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:07:14,958 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:07:14,984 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:07:14,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:07:14,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:07:14,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:07:14,986 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:07:14,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:07:14,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:07:14,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:07:14,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:07:14,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:07:14,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:07:14,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:07:14,988 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:07:14,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:07:14,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:07:14,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:07:14,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:07:14,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:07:14,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:07:14,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:07:14,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:07:14,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:07:14,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:07:14,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:07:14,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:07:14,991 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:07:15,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:07:15,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:07:15,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:07:15,407 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:07:15,407 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:07:15,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/rlim_exit.c [2020-12-23 06:07:15,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/38bd19acd/bb0025991e1f4bca8ccd713676fcd196/FLAGbfaf01a05 [2020-12-23 06:07:16,132 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:07:16,133 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/rlim_exit.c [2020-12-23 06:07:16,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/38bd19acd/bb0025991e1f4bca8ccd713676fcd196/FLAGbfaf01a05 [2020-12-23 06:07:16,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/38bd19acd/bb0025991e1f4bca8ccd713676fcd196 [2020-12-23 06:07:16,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:07:16,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:07:16,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:07:16,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:07:16,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:07:16,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:07:16" (1/1) ... [2020-12-23 06:07:16,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18538337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:16, skipping insertion in model container [2020-12-23 06:07:16,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:07:16" (1/1) ... [2020-12-23 06:07:16,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:07:16,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:07:16,751 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/float-benchs/rlim_exit.c[446,459] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~X~0,] left hand side expression in assignment: lhs: VariableLHS[~D~0,] left hand side expression in assignment: lhs: VariableLHS[~S~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~R~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] [2020-12-23 06:07:16,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:07:16,791 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:07:16,810 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/float-benchs/rlim_exit.c[446,459] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~X~0,] left hand side expression in assignment: lhs: VariableLHS[~D~0,] left hand side expression in assignment: lhs: VariableLHS[~S~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~R~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] [2020-12-23 06:07:16,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:07:16,843 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:07:16,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:16 WrapperNode [2020-12-23 06:07:16,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:07:16,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:07:16,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:07:16,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:07:16,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:16" (1/1) ... [2020-12-23 06:07:16,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:16" (1/1) ... [2020-12-23 06:07:16,895 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:07:16,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:07:16,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:07:16,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:07:16,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:16" (1/1) ... [2020-12-23 06:07:16,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:16" (1/1) ... [2020-12-23 06:07:16,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:16" (1/1) ... [2020-12-23 06:07:16,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:16" (1/1) ... [2020-12-23 06:07:16,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:16" (1/1) ... [2020-12-23 06:07:16,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:16" (1/1) ... [2020-12-23 06:07:16,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:16" (1/1) ... [2020-12-23 06:07:16,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:07:16,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:07:16,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:07:16,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:07:16,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:07:17,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:07:17,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:07:17,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:07:17,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:07:17,344 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:07:17,344 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 06:07:17,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:07:17 BoogieIcfgContainer [2020-12-23 06:07:17,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:07:17,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:07:17,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:07:17,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:07:17,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:07:16" (1/3) ... [2020-12-23 06:07:17,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e0663c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:07:17, skipping insertion in model container [2020-12-23 06:07:17,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:16" (2/3) ... [2020-12-23 06:07:17,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e0663c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:07:17, skipping insertion in model container [2020-12-23 06:07:17,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:07:17" (3/3) ... [2020-12-23 06:07:17,354 INFO L111 eAbstractionObserver]: Analyzing ICFG rlim_exit.c [2020-12-23 06:07:17,361 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:07:17,365 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:07:17,417 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:07:17,487 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:07:17,487 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:07:17,487 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:07:17,488 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:07:17,488 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:07:17,488 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:07:17,488 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:07:17,489 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:07:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-23 06:07:17,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:07:17,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:17,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:07:17,512 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:17,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:17,519 INFO L82 PathProgramCache]: Analyzing trace with hash 890522599, now seen corresponding path program 1 times [2020-12-23 06:07:17,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:17,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885416763] [2020-12-23 06:07:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:17,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885416763] [2020-12-23 06:07:17,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:07:17,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:07:17,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914561138] [2020-12-23 06:07:17,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:07:17,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:17,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:07:17,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:07:17,765 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-23 06:07:17,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:17,784 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-12-23 06:07:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:07:17,785 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-23 06:07:17,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:17,797 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:07:17,797 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 06:07:17,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:07:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 06:07:17,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 06:07:17,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:07:17,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-23 06:07:17,834 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2020-12-23 06:07:17,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:17,834 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-23 06:07:17,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:07:17,835 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-23 06:07:17,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:07:17,835 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:17,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:07:17,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:07:17,836 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:17,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:17,837 INFO L82 PathProgramCache]: Analyzing trace with hash 889628869, now seen corresponding path program 1 times [2020-12-23 06:07:17,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:17,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96080756] [2020-12-23 06:07:17,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:17,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96080756] [2020-12-23 06:07:17,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:07:17,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:07:17,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089136890] [2020-12-23 06:07:17,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:07:17,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:17,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:07:17,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:07:17,893 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-12-23 06:07:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:17,909 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-12-23 06:07:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:07:17,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 06:07:17,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:17,912 INFO L225 Difference]: With dead ends: 26 [2020-12-23 06:07:17,913 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 06:07:17,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:07:17,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 06:07:17,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2020-12-23 06:07:17,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 06:07:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-23 06:07:17,918 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 6 [2020-12-23 06:07:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:17,919 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-23 06:07:17,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:07:17,919 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-23 06:07:17,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 06:07:17,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:17,920 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:17,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:07:17,920 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:17,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:17,921 INFO L82 PathProgramCache]: Analyzing trace with hash -32842122, now seen corresponding path program 1 times [2020-12-23 06:07:17,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:17,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439759521] [2020-12-23 06:07:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:17,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439759521] [2020-12-23 06:07:17,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114636767] [2020-12-23 06:07:17,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:18,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 06:07:18,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:18,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:18,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:07:18,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203735258] [2020-12-23 06:07:18,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:07:18,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:18,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:07:18,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:07:18,157 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2020-12-23 06:07:18,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:18,181 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-12-23 06:07:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:07:18,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-23 06:07:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:18,183 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:07:18,183 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 06:07:18,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:07:18,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 06:07:18,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2020-12-23 06:07:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 06:07:18,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-23 06:07:18,189 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2020-12-23 06:07:18,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:18,190 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-23 06:07:18,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:07:18,190 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-23 06:07:18,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 06:07:18,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:18,191 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:18,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:07:18,407 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:18,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:18,408 INFO L82 PathProgramCache]: Analyzing trace with hash 964759461, now seen corresponding path program 2 times [2020-12-23 06:07:18,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:18,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449847073] [2020-12-23 06:07:18,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:18,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449847073] [2020-12-23 06:07:18,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455924935] [2020-12-23 06:07:18,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:18,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:18,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:18,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:07:18,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:18,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:18,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:07:18,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394636954] [2020-12-23 06:07:18,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:07:18,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:18,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:07:18,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:07:18,632 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-12-23 06:07:18,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:18,671 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-12-23 06:07:18,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:07:18,672 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-23 06:07:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:18,673 INFO L225 Difference]: With dead ends: 42 [2020-12-23 06:07:18,674 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 06:07:18,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:07:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 06:07:18,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-12-23 06:07:18,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:07:18,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-12-23 06:07:18,681 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2020-12-23 06:07:18,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:18,682 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-12-23 06:07:18,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:07:18,682 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-12-23 06:07:18,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 06:07:18,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:18,683 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:18,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:18,897 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:18,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:18,898 INFO L82 PathProgramCache]: Analyzing trace with hash 2033777558, now seen corresponding path program 3 times [2020-12-23 06:07:18,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:18,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182128049] [2020-12-23 06:07:18,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:19,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182128049] [2020-12-23 06:07:19,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43317156] [2020-12-23 06:07:19,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:19,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:07:19,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:19,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:07:19,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:19,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:19,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:07:19,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757852332] [2020-12-23 06:07:19,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:07:19,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:19,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:07:19,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:07:19,290 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 7 states. [2020-12-23 06:07:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:19,319 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-12-23 06:07:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:07:19,320 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-12-23 06:07:19,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:19,321 INFO L225 Difference]: With dead ends: 50 [2020-12-23 06:07:19,321 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:07:19,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:07:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:07:19,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-12-23 06:07:19,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 06:07:19,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-12-23 06:07:19,329 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 27 [2020-12-23 06:07:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:19,329 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-12-23 06:07:19,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:07:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-12-23 06:07:19,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:07:19,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:19,331 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:19,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:19,545 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:19,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:19,546 INFO L82 PathProgramCache]: Analyzing trace with hash -322048379, now seen corresponding path program 4 times [2020-12-23 06:07:19,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:19,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903462248] [2020-12-23 06:07:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:19,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903462248] [2020-12-23 06:07:19,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149222048] [2020-12-23 06:07:19,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:19,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:19,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:19,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:07:19,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:19,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:19,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:07:19,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789860462] [2020-12-23 06:07:19,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:07:19,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:19,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:07:19,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:07:19,821 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 8 states. [2020-12-23 06:07:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:19,858 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-12-23 06:07:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:07:19,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-12-23 06:07:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:19,860 INFO L225 Difference]: With dead ends: 58 [2020-12-23 06:07:19,860 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 06:07:19,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:07:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 06:07:19,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-12-23 06:07:19,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 06:07:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-12-23 06:07:19,871 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 34 [2020-12-23 06:07:19,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:19,872 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-12-23 06:07:19,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:07:19,872 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-12-23 06:07:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 06:07:19,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:19,875 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:20,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:20,091 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:20,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:20,092 INFO L82 PathProgramCache]: Analyzing trace with hash -497180490, now seen corresponding path program 5 times [2020-12-23 06:07:20,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:20,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660122466] [2020-12-23 06:07:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:20,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660122466] [2020-12-23 06:07:20,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530449746] [2020-12-23 06:07:20,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:20,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:07:20,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:20,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:07:20,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:20,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:20,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:07:20,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981244558] [2020-12-23 06:07:20,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:07:20,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:20,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:07:20,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:07:20,348 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 9 states. [2020-12-23 06:07:20,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:20,382 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2020-12-23 06:07:20,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:07:20,383 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-12-23 06:07:20,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:20,386 INFO L225 Difference]: With dead ends: 66 [2020-12-23 06:07:20,386 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 06:07:20,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:07:20,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 06:07:20,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-12-23 06:07:20,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 06:07:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2020-12-23 06:07:20,402 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 41 [2020-12-23 06:07:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:20,402 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2020-12-23 06:07:20,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:07:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2020-12-23 06:07:20,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 06:07:20,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:20,407 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:20,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 06:07:20,625 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:20,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:20,626 INFO L82 PathProgramCache]: Analyzing trace with hash -784644763, now seen corresponding path program 6 times [2020-12-23 06:07:20,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:20,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62581265] [2020-12-23 06:07:20,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:20,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62581265] [2020-12-23 06:07:20,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39914667] [2020-12-23 06:07:20,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:20,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:07:20,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:20,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:07:20,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:21,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:21,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:07:21,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604135754] [2020-12-23 06:07:21,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:07:21,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:21,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:07:21,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:07:21,034 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 10 states. [2020-12-23 06:07:21,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:21,099 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2020-12-23 06:07:21,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:07:21,099 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-12-23 06:07:21,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:21,100 INFO L225 Difference]: With dead ends: 74 [2020-12-23 06:07:21,101 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 06:07:21,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:07:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 06:07:21,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-12-23 06:07:21,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 06:07:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2020-12-23 06:07:21,108 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 48 [2020-12-23 06:07:21,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:21,108 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2020-12-23 06:07:21,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:07:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2020-12-23 06:07:21,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 06:07:21,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:21,110 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:21,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:21,325 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:21,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:21,325 INFO L82 PathProgramCache]: Analyzing trace with hash 594202070, now seen corresponding path program 7 times [2020-12-23 06:07:21,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:21,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521877775] [2020-12-23 06:07:21,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:21,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521877775] [2020-12-23 06:07:21,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216092284] [2020-12-23 06:07:21,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:21,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:07:21,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:21,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:21,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:07:21,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760071328] [2020-12-23 06:07:21,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:07:21,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:21,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:07:21,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:07:21,712 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 11 states. [2020-12-23 06:07:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:21,767 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2020-12-23 06:07:21,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:07:21,767 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-12-23 06:07:21,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:21,771 INFO L225 Difference]: With dead ends: 82 [2020-12-23 06:07:21,771 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 06:07:21,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:07:21,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 06:07:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2020-12-23 06:07:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 06:07:21,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-12-23 06:07:21,778 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 55 [2020-12-23 06:07:21,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:21,778 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-12-23 06:07:21,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:07:21,779 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-12-23 06:07:21,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 06:07:21,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:21,780 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:21,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:21,996 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:21,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:21,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1217860677, now seen corresponding path program 8 times [2020-12-23 06:07:21,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:21,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944488261] [2020-12-23 06:07:21,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:22,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944488261] [2020-12-23 06:07:22,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587069530] [2020-12-23 06:07:22,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:22,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:22,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:22,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:07:22,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:22,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:22,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 06:07:22,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898455439] [2020-12-23 06:07:22,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:07:22,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:22,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:07:22,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:07:22,308 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 12 states. [2020-12-23 06:07:22,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:22,355 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-12-23 06:07:22,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:07:22,356 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-12-23 06:07:22,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:22,357 INFO L225 Difference]: With dead ends: 90 [2020-12-23 06:07:22,357 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 06:07:22,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:07:22,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 06:07:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2020-12-23 06:07:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 06:07:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2020-12-23 06:07:22,364 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 62 [2020-12-23 06:07:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:22,365 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2020-12-23 06:07:22,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:07:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2020-12-23 06:07:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 06:07:22,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:22,366 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:22,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 06:07:22,582 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:22,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:22,583 INFO L82 PathProgramCache]: Analyzing trace with hash -690846986, now seen corresponding path program 9 times [2020-12-23 06:07:22,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:22,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925217618] [2020-12-23 06:07:22,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:22,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925217618] [2020-12-23 06:07:22,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572872032] [2020-12-23 06:07:22,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:22,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 06:07:22,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:22,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:07:22,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:22,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:22,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:07:22,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287571178] [2020-12-23 06:07:22,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:07:22,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:22,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:07:22,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:07:22,962 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand 13 states. [2020-12-23 06:07:23,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:23,017 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2020-12-23 06:07:23,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:07:23,017 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-12-23 06:07:23,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:23,018 INFO L225 Difference]: With dead ends: 98 [2020-12-23 06:07:23,018 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 06:07:23,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:07:23,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 06:07:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2020-12-23 06:07:23,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 06:07:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2020-12-23 06:07:23,025 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 69 [2020-12-23 06:07:23,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:23,026 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2020-12-23 06:07:23,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:07:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2020-12-23 06:07:23,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 06:07:23,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:23,027 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:23,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:23,242 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:23,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:23,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1949260581, now seen corresponding path program 10 times [2020-12-23 06:07:23,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:23,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634505293] [2020-12-23 06:07:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:23,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634505293] [2020-12-23 06:07:23,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626548213] [2020-12-23 06:07:23,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:23,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:23,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:23,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:07:23,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:23,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:23,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 06:07:23,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673376759] [2020-12-23 06:07:23,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:07:23,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:23,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:07:23,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:07:23,607 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand 14 states. [2020-12-23 06:07:23,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:23,656 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2020-12-23 06:07:23,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:07:23,657 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2020-12-23 06:07:23,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:23,658 INFO L225 Difference]: With dead ends: 106 [2020-12-23 06:07:23,658 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 06:07:23,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:07:23,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 06:07:23,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-12-23 06:07:23,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 06:07:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2020-12-23 06:07:23,664 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 76 [2020-12-23 06:07:23,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:23,665 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2020-12-23 06:07:23,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:07:23,665 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2020-12-23 06:07:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 06:07:23,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:23,666 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:23,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:23,880 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:23,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1736884246, now seen corresponding path program 11 times [2020-12-23 06:07:23,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:23,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125841741] [2020-12-23 06:07:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:24,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125841741] [2020-12-23 06:07:24,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833909502] [2020-12-23 06:07:24,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:24,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 06:07:24,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:24,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:07:24,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:24,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:24,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 06:07:24,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082351539] [2020-12-23 06:07:24,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:07:24,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:24,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:07:24,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:07:24,314 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand 15 states. [2020-12-23 06:07:24,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:24,380 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2020-12-23 06:07:24,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:07:24,381 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-12-23 06:07:24,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:24,382 INFO L225 Difference]: With dead ends: 114 [2020-12-23 06:07:24,382 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 06:07:24,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:07:24,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 06:07:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2020-12-23 06:07:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 06:07:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2020-12-23 06:07:24,389 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 83 [2020-12-23 06:07:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:24,390 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2020-12-23 06:07:24,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:07:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2020-12-23 06:07:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 06:07:24,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:24,391 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:24,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:07:24,607 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:24,608 INFO L82 PathProgramCache]: Analyzing trace with hash 349313541, now seen corresponding path program 12 times [2020-12-23 06:07:24,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:24,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231392873] [2020-12-23 06:07:24,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:24,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231392873] [2020-12-23 06:07:24,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044248378] [2020-12-23 06:07:24,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:24,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 06:07:24,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:24,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:07:24,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:25,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:25,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 06:07:25,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650436115] [2020-12-23 06:07:25,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:07:25,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:25,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:07:25,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:07:25,019 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand 16 states. [2020-12-23 06:07:25,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:25,088 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2020-12-23 06:07:25,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:07:25,088 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2020-12-23 06:07:25,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:25,089 INFO L225 Difference]: With dead ends: 122 [2020-12-23 06:07:25,089 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 06:07:25,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:07:25,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 06:07:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 111. [2020-12-23 06:07:25,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 06:07:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 137 transitions. [2020-12-23 06:07:25,095 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 137 transitions. Word has length 90 [2020-12-23 06:07:25,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:25,095 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 137 transitions. [2020-12-23 06:07:25,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:07:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 137 transitions. [2020-12-23 06:07:25,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 06:07:25,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:25,097 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:25,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:07:25,312 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:25,313 INFO L82 PathProgramCache]: Analyzing trace with hash 821658934, now seen corresponding path program 13 times [2020-12-23 06:07:25,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:25,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812696074] [2020-12-23 06:07:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:25,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812696074] [2020-12-23 06:07:25,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839899930] [2020-12-23 06:07:25,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:25,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 06:07:25,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:25,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:25,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 06:07:25,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936517143] [2020-12-23 06:07:25,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:07:25,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:25,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:07:25,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:07:25,771 INFO L87 Difference]: Start difference. First operand 111 states and 137 transitions. Second operand 17 states. [2020-12-23 06:07:25,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:25,841 INFO L93 Difference]: Finished difference Result 130 states and 160 transitions. [2020-12-23 06:07:25,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:07:25,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-12-23 06:07:25,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:25,843 INFO L225 Difference]: With dead ends: 130 [2020-12-23 06:07:25,843 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 06:07:25,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:07:25,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 06:07:25,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2020-12-23 06:07:25,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-23 06:07:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 147 transitions. [2020-12-23 06:07:25,849 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 147 transitions. Word has length 97 [2020-12-23 06:07:25,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:25,849 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 147 transitions. [2020-12-23 06:07:25,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:07:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 147 transitions. [2020-12-23 06:07:25,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 06:07:25,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:25,851 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:26,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 06:07:26,066 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:26,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:26,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1791840485, now seen corresponding path program 14 times [2020-12-23 06:07:26,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:26,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561435195] [2020-12-23 06:07:26,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:26,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561435195] [2020-12-23 06:07:26,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910453471] [2020-12-23 06:07:26,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:26,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:26,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:26,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:07:26,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:26,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:26,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 06:07:26,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697094149] [2020-12-23 06:07:26,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:07:26,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:26,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:07:26,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:07:26,591 INFO L87 Difference]: Start difference. First operand 119 states and 147 transitions. Second operand 18 states. [2020-12-23 06:07:26,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:26,673 INFO L93 Difference]: Finished difference Result 138 states and 170 transitions. [2020-12-23 06:07:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:07:26,673 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 104 [2020-12-23 06:07:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:26,674 INFO L225 Difference]: With dead ends: 138 [2020-12-23 06:07:26,674 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 06:07:26,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:07:26,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 06:07:26,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2020-12-23 06:07:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 06:07:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 157 transitions. [2020-12-23 06:07:26,680 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 157 transitions. Word has length 104 [2020-12-23 06:07:26,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:26,680 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 157 transitions. [2020-12-23 06:07:26,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:07:26,680 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 157 transitions. [2020-12-23 06:07:26,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 06:07:26,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:26,683 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:26,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:26,897 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:26,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:26,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1625501098, now seen corresponding path program 15 times [2020-12-23 06:07:26,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:26,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418026611] [2020-12-23 06:07:26,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:27,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418026611] [2020-12-23 06:07:27,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891028464] [2020-12-23 06:07:27,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:27,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 06:07:27,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:27,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:07:27,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:27,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:27,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 06:07:27,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061709197] [2020-12-23 06:07:27,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:07:27,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:27,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:07:27,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:07:27,507 INFO L87 Difference]: Start difference. First operand 127 states and 157 transitions. Second operand 19 states. [2020-12-23 06:07:27,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:27,617 INFO L93 Difference]: Finished difference Result 146 states and 180 transitions. [2020-12-23 06:07:27,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:07:27,618 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 111 [2020-12-23 06:07:27,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:27,620 INFO L225 Difference]: With dead ends: 146 [2020-12-23 06:07:27,620 INFO L226 Difference]: Without dead ends: 142 [2020-12-23 06:07:27,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:07:27,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-23 06:07:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 135. [2020-12-23 06:07:27,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-23 06:07:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 167 transitions. [2020-12-23 06:07:27,627 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 167 transitions. Word has length 111 [2020-12-23 06:07:27,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:27,628 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 167 transitions. [2020-12-23 06:07:27,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:07:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 167 transitions. [2020-12-23 06:07:27,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 06:07:27,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:27,630 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:27,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:07:27,845 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:27,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:27,845 INFO L82 PathProgramCache]: Analyzing trace with hash 367984581, now seen corresponding path program 16 times [2020-12-23 06:07:27,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:27,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203561930] [2020-12-23 06:07:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:28,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203561930] [2020-12-23 06:07:28,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042657375] [2020-12-23 06:07:28,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:28,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:28,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:28,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 06:07:28,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:28,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:28,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 06:07:28,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825544006] [2020-12-23 06:07:28,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:07:28,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:28,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:07:28,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:07:28,438 INFO L87 Difference]: Start difference. First operand 135 states and 167 transitions. Second operand 20 states. [2020-12-23 06:07:28,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:28,521 INFO L93 Difference]: Finished difference Result 154 states and 190 transitions. [2020-12-23 06:07:28,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:07:28,522 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 118 [2020-12-23 06:07:28,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:28,523 INFO L225 Difference]: With dead ends: 154 [2020-12-23 06:07:28,523 INFO L226 Difference]: Without dead ends: 150 [2020-12-23 06:07:28,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:07:28,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-23 06:07:28,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2020-12-23 06:07:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-23 06:07:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 177 transitions. [2020-12-23 06:07:28,529 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 177 transitions. Word has length 118 [2020-12-23 06:07:28,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:28,529 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 177 transitions. [2020-12-23 06:07:28,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:07:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 177 transitions. [2020-12-23 06:07:28,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-23 06:07:28,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:28,531 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:28,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:07:28,746 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:28,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:28,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1315088246, now seen corresponding path program 17 times [2020-12-23 06:07:28,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:28,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808741591] [2020-12-23 06:07:28,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:29,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808741591] [2020-12-23 06:07:29,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394056633] [2020-12-23 06:07:29,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:29,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 06:07:29,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:29,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 06:07:29,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:29,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:29,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 06:07:29,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472180407] [2020-12-23 06:07:29,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:07:29,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:29,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:07:29,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:07:29,354 INFO L87 Difference]: Start difference. First operand 143 states and 177 transitions. Second operand 21 states. [2020-12-23 06:07:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:29,434 INFO L93 Difference]: Finished difference Result 162 states and 200 transitions. [2020-12-23 06:07:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:07:29,435 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 125 [2020-12-23 06:07:29,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:29,436 INFO L225 Difference]: With dead ends: 162 [2020-12-23 06:07:29,436 INFO L226 Difference]: Without dead ends: 158 [2020-12-23 06:07:29,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:07:29,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-23 06:07:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 151. [2020-12-23 06:07:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 06:07:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 187 transitions. [2020-12-23 06:07:29,442 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 187 transitions. Word has length 125 [2020-12-23 06:07:29,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:29,442 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 187 transitions. [2020-12-23 06:07:29,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:07:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 187 transitions. [2020-12-23 06:07:29,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-23 06:07:29,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:29,444 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:29,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:29,659 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:29,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:29,660 INFO L82 PathProgramCache]: Analyzing trace with hash -175823195, now seen corresponding path program 18 times [2020-12-23 06:07:29,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:29,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112181950] [2020-12-23 06:07:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:29,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112181950] [2020-12-23 06:07:29,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968503380] [2020-12-23 06:07:29,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:30,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 06:07:30,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:30,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 06:07:30,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:30,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:30,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 06:07:30,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99349341] [2020-12-23 06:07:30,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:07:30,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:30,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:07:30,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:07:30,306 INFO L87 Difference]: Start difference. First operand 151 states and 187 transitions. Second operand 22 states. [2020-12-23 06:07:30,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:30,397 INFO L93 Difference]: Finished difference Result 170 states and 210 transitions. [2020-12-23 06:07:30,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:07:30,398 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 132 [2020-12-23 06:07:30,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:30,399 INFO L225 Difference]: With dead ends: 170 [2020-12-23 06:07:30,399 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 06:07:30,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:07:30,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 06:07:30,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2020-12-23 06:07:30,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 06:07:30,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 197 transitions. [2020-12-23 06:07:30,404 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 197 transitions. Word has length 132 [2020-12-23 06:07:30,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:30,405 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 197 transitions. [2020-12-23 06:07:30,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:07:30,405 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 197 transitions. [2020-12-23 06:07:30,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-23 06:07:30,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:30,406 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:30,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:30,620 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:30,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:30,621 INFO L82 PathProgramCache]: Analyzing trace with hash 733807766, now seen corresponding path program 19 times [2020-12-23 06:07:30,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:30,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337167382] [2020-12-23 06:07:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:30,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337167382] [2020-12-23 06:07:30,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726364183] [2020-12-23 06:07:30,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:31,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 06:07:31,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:31,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:31,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 06:07:31,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710110800] [2020-12-23 06:07:31,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:07:31,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:31,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:07:31,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:07:31,278 INFO L87 Difference]: Start difference. First operand 159 states and 197 transitions. Second operand 23 states. [2020-12-23 06:07:31,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:31,369 INFO L93 Difference]: Finished difference Result 178 states and 220 transitions. [2020-12-23 06:07:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:07:31,369 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 139 [2020-12-23 06:07:31,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:31,371 INFO L225 Difference]: With dead ends: 178 [2020-12-23 06:07:31,371 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 06:07:31,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:07:31,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 06:07:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 167. [2020-12-23 06:07:31,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 06:07:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 207 transitions. [2020-12-23 06:07:31,376 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 207 transitions. Word has length 139 [2020-12-23 06:07:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:31,376 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 207 transitions. [2020-12-23 06:07:31,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:07:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 207 transitions. [2020-12-23 06:07:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-23 06:07:31,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:31,378 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:31,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:31,593 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:31,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:31,594 INFO L82 PathProgramCache]: Analyzing trace with hash 140363141, now seen corresponding path program 20 times [2020-12-23 06:07:31,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:31,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865966295] [2020-12-23 06:07:31,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:32,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865966295] [2020-12-23 06:07:32,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253501270] [2020-12-23 06:07:32,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:32,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:32,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:32,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:07:32,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:32,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:32,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 06:07:32,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785172140] [2020-12-23 06:07:32,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:07:32,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:32,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:07:32,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:07:32,349 INFO L87 Difference]: Start difference. First operand 167 states and 207 transitions. Second operand 24 states. [2020-12-23 06:07:32,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:32,446 INFO L93 Difference]: Finished difference Result 186 states and 230 transitions. [2020-12-23 06:07:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:07:32,447 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 146 [2020-12-23 06:07:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:32,448 INFO L225 Difference]: With dead ends: 186 [2020-12-23 06:07:32,449 INFO L226 Difference]: Without dead ends: 182 [2020-12-23 06:07:32,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:07:32,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-23 06:07:32,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 175. [2020-12-23 06:07:32,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 06:07:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 217 transitions. [2020-12-23 06:07:32,454 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 217 transitions. Word has length 146 [2020-12-23 06:07:32,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:32,454 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 217 transitions. [2020-12-23 06:07:32,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:07:32,455 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 217 transitions. [2020-12-23 06:07:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-23 06:07:32,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:32,457 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:32,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:07:32,670 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:32,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:32,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1801590346, now seen corresponding path program 21 times [2020-12-23 06:07:32,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:32,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513231788] [2020-12-23 06:07:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1491 backedges. 0 proven. 1491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:33,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513231788] [2020-12-23 06:07:33,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747664190] [2020-12-23 06:07:33,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:33,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 06:07:33,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:33,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 06:07:33,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1491 backedges. 0 proven. 1491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:33,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:33,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 06:07:33,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281120962] [2020-12-23 06:07:33,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:07:33,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:33,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:07:33,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:07:33,492 INFO L87 Difference]: Start difference. First operand 175 states and 217 transitions. Second operand 25 states. [2020-12-23 06:07:33,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:33,590 INFO L93 Difference]: Finished difference Result 194 states and 240 transitions. [2020-12-23 06:07:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:07:33,591 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 153 [2020-12-23 06:07:33,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:33,592 INFO L225 Difference]: With dead ends: 194 [2020-12-23 06:07:33,592 INFO L226 Difference]: Without dead ends: 190 [2020-12-23 06:07:33,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:07:33,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-23 06:07:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 183. [2020-12-23 06:07:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-23 06:07:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 227 transitions. [2020-12-23 06:07:33,598 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 227 transitions. Word has length 153 [2020-12-23 06:07:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:33,599 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 227 transitions. [2020-12-23 06:07:33,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:07:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 227 transitions. [2020-12-23 06:07:33,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-23 06:07:33,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:33,601 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:33,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 06:07:33,817 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:33,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:33,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1288100965, now seen corresponding path program 22 times [2020-12-23 06:07:33,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:33,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190303737] [2020-12-23 06:07:33,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1639 backedges. 0 proven. 1639 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:34,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190303737] [2020-12-23 06:07:34,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155502008] [2020-12-23 06:07:34,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:34,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:34,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:34,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:07:34,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1639 backedges. 0 proven. 1639 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:34,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:34,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 06:07:34,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248863112] [2020-12-23 06:07:34,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:07:34,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:34,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:07:34,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:07:34,598 INFO L87 Difference]: Start difference. First operand 183 states and 227 transitions. Second operand 26 states. [2020-12-23 06:07:34,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:34,713 INFO L93 Difference]: Finished difference Result 202 states and 250 transitions. [2020-12-23 06:07:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:07:34,714 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 160 [2020-12-23 06:07:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:34,716 INFO L225 Difference]: With dead ends: 202 [2020-12-23 06:07:34,716 INFO L226 Difference]: Without dead ends: 198 [2020-12-23 06:07:34,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:07:34,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-23 06:07:34,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 191. [2020-12-23 06:07:34,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-23 06:07:34,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 237 transitions. [2020-12-23 06:07:34,726 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 237 transitions. Word has length 160 [2020-12-23 06:07:34,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:34,726 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 237 transitions. [2020-12-23 06:07:34,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:07:34,726 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 237 transitions. [2020-12-23 06:07:34,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-23 06:07:34,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:34,728 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:34,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:34,943 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:34,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:34,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1995921110, now seen corresponding path program 23 times [2020-12-23 06:07:34,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:34,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852759755] [2020-12-23 06:07:34,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 0 proven. 1794 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:35,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852759755] [2020-12-23 06:07:35,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019941830] [2020-12-23 06:07:35,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:35,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 06:07:35,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:35,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 06:07:35,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 0 proven. 1794 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:35,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:35,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 06:07:35,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784845579] [2020-12-23 06:07:35,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:07:35,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:35,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:07:35,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:07:35,822 INFO L87 Difference]: Start difference. First operand 191 states and 237 transitions. Second operand 27 states. [2020-12-23 06:07:35,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:35,950 INFO L93 Difference]: Finished difference Result 210 states and 260 transitions. [2020-12-23 06:07:35,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 06:07:35,950 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 167 [2020-12-23 06:07:35,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:35,952 INFO L225 Difference]: With dead ends: 210 [2020-12-23 06:07:35,952 INFO L226 Difference]: Without dead ends: 206 [2020-12-23 06:07:35,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:07:35,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-23 06:07:35,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 199. [2020-12-23 06:07:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-23 06:07:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 247 transitions. [2020-12-23 06:07:35,959 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 247 transitions. Word has length 167 [2020-12-23 06:07:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:35,960 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 247 transitions. [2020-12-23 06:07:35,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:07:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 247 transitions. [2020-12-23 06:07:35,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-23 06:07:35,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:35,962 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:36,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 06:07:36,176 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:36,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:36,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1601279163, now seen corresponding path program 24 times [2020-12-23 06:07:36,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:36,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654715650] [2020-12-23 06:07:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 1956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:36,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654715650] [2020-12-23 06:07:36,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610330791] [2020-12-23 06:07:36,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:36,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 06:07:36,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:36,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 06:07:36,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 1956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:37,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:37,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 06:07:37,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484658326] [2020-12-23 06:07:37,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:07:37,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:37,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:07:37,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:07:37,157 INFO L87 Difference]: Start difference. First operand 199 states and 247 transitions. Second operand 28 states. [2020-12-23 06:07:37,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:37,288 INFO L93 Difference]: Finished difference Result 218 states and 270 transitions. [2020-12-23 06:07:37,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:07:37,289 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 174 [2020-12-23 06:07:37,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:37,290 INFO L225 Difference]: With dead ends: 218 [2020-12-23 06:07:37,290 INFO L226 Difference]: Without dead ends: 214 [2020-12-23 06:07:37,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:07:37,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-23 06:07:37,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 207. [2020-12-23 06:07:37,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-23 06:07:37,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 257 transitions. [2020-12-23 06:07:37,297 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 257 transitions. Word has length 174 [2020-12-23 06:07:37,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:37,297 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 257 transitions. [2020-12-23 06:07:37,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:07:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 257 transitions. [2020-12-23 06:07:37,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-23 06:07:37,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:37,298 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:37,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:37,513 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:37,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:37,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1899711478, now seen corresponding path program 25 times [2020-12-23 06:07:37,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:37,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359561659] [2020-12-23 06:07:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 0 proven. 2125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:38,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359561659] [2020-12-23 06:07:38,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789238239] [2020-12-23 06:07:38,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:38,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:07:38,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 0 proven. 2125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:38,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:38,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 06:07:38,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597017710] [2020-12-23 06:07:38,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:07:38,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:38,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:07:38,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:07:38,416 INFO L87 Difference]: Start difference. First operand 207 states and 257 transitions. Second operand 29 states. [2020-12-23 06:07:38,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:38,548 INFO L93 Difference]: Finished difference Result 226 states and 280 transitions. [2020-12-23 06:07:38,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:07:38,549 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 181 [2020-12-23 06:07:38,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:38,550 INFO L225 Difference]: With dead ends: 226 [2020-12-23 06:07:38,550 INFO L226 Difference]: Without dead ends: 222 [2020-12-23 06:07:38,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:07:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-12-23 06:07:38,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2020-12-23 06:07:38,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-23 06:07:38,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 267 transitions. [2020-12-23 06:07:38,557 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 267 transitions. Word has length 181 [2020-12-23 06:07:38,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:38,557 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 267 transitions. [2020-12-23 06:07:38,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:07:38,558 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 267 transitions. [2020-12-23 06:07:38,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-23 06:07:38,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:38,559 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:38,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:07:38,773 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:38,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:38,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1593675227, now seen corresponding path program 26 times [2020-12-23 06:07:38,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:38,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656475886] [2020-12-23 06:07:38,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:39,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656475886] [2020-12-23 06:07:39,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266665259] [2020-12-23 06:07:39,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:39,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:39,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:39,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 06:07:39,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:39,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:39,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 06:07:39,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820666993] [2020-12-23 06:07:39,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:07:39,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:39,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:07:39,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:07:39,744 INFO L87 Difference]: Start difference. First operand 215 states and 267 transitions. Second operand 30 states. [2020-12-23 06:07:39,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:39,903 INFO L93 Difference]: Finished difference Result 234 states and 290 transitions. [2020-12-23 06:07:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:07:39,903 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 188 [2020-12-23 06:07:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:39,905 INFO L225 Difference]: With dead ends: 234 [2020-12-23 06:07:39,905 INFO L226 Difference]: Without dead ends: 230 [2020-12-23 06:07:39,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:07:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-12-23 06:07:39,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 223. [2020-12-23 06:07:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-23 06:07:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 277 transitions. [2020-12-23 06:07:39,912 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 277 transitions. Word has length 188 [2020-12-23 06:07:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:39,912 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 277 transitions. [2020-12-23 06:07:39,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:07:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 277 transitions. [2020-12-23 06:07:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-12-23 06:07:39,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:39,914 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:40,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:07:40,124 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:40,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:40,125 INFO L82 PathProgramCache]: Analyzing trace with hash -228865770, now seen corresponding path program 27 times [2020-12-23 06:07:40,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:40,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082576653] [2020-12-23 06:07:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2484 backedges. 0 proven. 2484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:40,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082576653] [2020-12-23 06:07:40,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107345436] [2020-12-23 06:07:40,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:40,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-23 06:07:40,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:40,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 06:07:40,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2484 backedges. 0 proven. 2484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:41,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:41,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 06:07:41,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392060521] [2020-12-23 06:07:41,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:07:41,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:41,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:07:41,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:07:41,210 INFO L87 Difference]: Start difference. First operand 223 states and 277 transitions. Second operand 31 states. [2020-12-23 06:07:41,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:41,360 INFO L93 Difference]: Finished difference Result 242 states and 300 transitions. [2020-12-23 06:07:41,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:07:41,360 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 195 [2020-12-23 06:07:41,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:41,362 INFO L225 Difference]: With dead ends: 242 [2020-12-23 06:07:41,362 INFO L226 Difference]: Without dead ends: 238 [2020-12-23 06:07:41,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:07:41,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-23 06:07:41,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 231. [2020-12-23 06:07:41,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-12-23 06:07:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 287 transitions. [2020-12-23 06:07:41,371 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 287 transitions. Word has length 195 [2020-12-23 06:07:41,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:41,372 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 287 transitions. [2020-12-23 06:07:41,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:07:41,372 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 287 transitions. [2020-12-23 06:07:41,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-23 06:07:41,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:41,373 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:41,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:07:41,588 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:41,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:41,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1963921147, now seen corresponding path program 28 times [2020-12-23 06:07:41,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:41,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616815196] [2020-12-23 06:07:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2674 backedges. 0 proven. 2674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:42,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616815196] [2020-12-23 06:07:42,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137032651] [2020-12-23 06:07:42,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:42,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:42,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:42,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:07:42,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2674 backedges. 0 proven. 2674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:42,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:42,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 06:07:42,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35392646] [2020-12-23 06:07:42,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:07:42,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:42,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:07:42,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:07:42,764 INFO L87 Difference]: Start difference. First operand 231 states and 287 transitions. Second operand 32 states. [2020-12-23 06:07:42,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:42,912 INFO L93 Difference]: Finished difference Result 250 states and 310 transitions. [2020-12-23 06:07:42,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:07:42,913 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 202 [2020-12-23 06:07:42,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:42,914 INFO L225 Difference]: With dead ends: 250 [2020-12-23 06:07:42,914 INFO L226 Difference]: Without dead ends: 246 [2020-12-23 06:07:42,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:07:42,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-23 06:07:42,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 239. [2020-12-23 06:07:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-12-23 06:07:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 297 transitions. [2020-12-23 06:07:42,929 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 297 transitions. Word has length 202 [2020-12-23 06:07:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:42,929 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 297 transitions. [2020-12-23 06:07:42,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:07:42,929 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 297 transitions. [2020-12-23 06:07:42,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-12-23 06:07:42,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:42,931 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:43,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:43,145 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:43,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:43,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1506463286, now seen corresponding path program 29 times [2020-12-23 06:07:43,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:43,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275733516] [2020-12-23 06:07:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2871 backedges. 0 proven. 2871 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:43,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275733516] [2020-12-23 06:07:43,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405584807] [2020-12-23 06:07:43,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:44,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-23 06:07:44,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:44,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:07:44,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2871 backedges. 0 proven. 2871 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:44,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:44,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 06:07:44,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790960449] [2020-12-23 06:07:44,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:07:44,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:44,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:07:44,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:07:44,434 INFO L87 Difference]: Start difference. First operand 239 states and 297 transitions. Second operand 33 states. [2020-12-23 06:07:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:44,572 INFO L93 Difference]: Finished difference Result 258 states and 320 transitions. [2020-12-23 06:07:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 06:07:44,573 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 209 [2020-12-23 06:07:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:44,575 INFO L225 Difference]: With dead ends: 258 [2020-12-23 06:07:44,575 INFO L226 Difference]: Without dead ends: 254 [2020-12-23 06:07:44,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:07:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-12-23 06:07:44,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 247. [2020-12-23 06:07:44,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-23 06:07:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 307 transitions. [2020-12-23 06:07:44,582 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 307 transitions. Word has length 209 [2020-12-23 06:07:44,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:44,583 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 307 transitions. [2020-12-23 06:07:44,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:07:44,583 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 307 transitions. [2020-12-23 06:07:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-23 06:07:44,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:44,584 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:44,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 06:07:44,797 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:44,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:44,798 INFO L82 PathProgramCache]: Analyzing trace with hash 447211493, now seen corresponding path program 30 times [2020-12-23 06:07:44,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:44,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185083558] [2020-12-23 06:07:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3075 backedges. 0 proven. 3075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:45,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185083558] [2020-12-23 06:07:45,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729474048] [2020-12-23 06:07:45,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:45,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 06:07:45,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:45,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 06:07:45,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3075 backedges. 0 proven. 3075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:46,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:46,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 06:07:46,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906421300] [2020-12-23 06:07:46,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:07:46,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:46,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:07:46,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:07:46,075 INFO L87 Difference]: Start difference. First operand 247 states and 307 transitions. Second operand 34 states. [2020-12-23 06:07:46,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:46,229 INFO L93 Difference]: Finished difference Result 266 states and 330 transitions. [2020-12-23 06:07:46,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:07:46,229 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 216 [2020-12-23 06:07:46,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:46,231 INFO L225 Difference]: With dead ends: 266 [2020-12-23 06:07:46,231 INFO L226 Difference]: Without dead ends: 262 [2020-12-23 06:07:46,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:07:46,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-23 06:07:46,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 255. [2020-12-23 06:07:46,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-12-23 06:07:46,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 317 transitions. [2020-12-23 06:07:46,239 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 317 transitions. Word has length 216 [2020-12-23 06:07:46,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:46,239 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 317 transitions. [2020-12-23 06:07:46,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:07:46,240 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 317 transitions. [2020-12-23 06:07:46,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-12-23 06:07:46,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:46,241 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:46,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:46,456 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:46,457 INFO L82 PathProgramCache]: Analyzing trace with hash 393894742, now seen corresponding path program 31 times [2020-12-23 06:07:46,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:46,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374703445] [2020-12-23 06:07:46,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3286 backedges. 0 proven. 3286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:47,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374703445] [2020-12-23 06:07:47,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979437564] [2020-12-23 06:07:47,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:47,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 06:07:47,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3286 backedges. 0 proven. 3286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:47,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:47,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 06:07:47,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090770160] [2020-12-23 06:07:47,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:07:47,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:47,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:07:47,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:07:47,644 INFO L87 Difference]: Start difference. First operand 255 states and 317 transitions. Second operand 35 states. [2020-12-23 06:07:47,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:47,786 INFO L93 Difference]: Finished difference Result 274 states and 340 transitions. [2020-12-23 06:07:47,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:07:47,786 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 223 [2020-12-23 06:07:47,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:47,788 INFO L225 Difference]: With dead ends: 274 [2020-12-23 06:07:47,788 INFO L226 Difference]: Without dead ends: 270 [2020-12-23 06:07:47,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:07:47,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-12-23 06:07:47,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 263. [2020-12-23 06:07:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-12-23 06:07:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 327 transitions. [2020-12-23 06:07:47,797 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 327 transitions. Word has length 223 [2020-12-23 06:07:47,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:47,798 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 327 transitions. [2020-12-23 06:07:47,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:07:47,798 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 327 transitions. [2020-12-23 06:07:47,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-12-23 06:07:47,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:47,799 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:48,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 06:07:48,013 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:48,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:48,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1811240645, now seen corresponding path program 32 times [2020-12-23 06:07:48,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:48,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297779086] [2020-12-23 06:07:48,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3504 backedges. 0 proven. 3504 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:48,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297779086] [2020-12-23 06:07:48,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602541553] [2020-12-23 06:07:48,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:49,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:49,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:07:49,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3504 backedges. 0 proven. 3504 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:49,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:49,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 06:07:49,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6248940] [2020-12-23 06:07:49,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 06:07:49,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:49,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 06:07:49,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:07:49,295 INFO L87 Difference]: Start difference. First operand 263 states and 327 transitions. Second operand 36 states. [2020-12-23 06:07:49,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:49,494 INFO L93 Difference]: Finished difference Result 282 states and 350 transitions. [2020-12-23 06:07:49,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 06:07:49,495 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 230 [2020-12-23 06:07:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:49,497 INFO L225 Difference]: With dead ends: 282 [2020-12-23 06:07:49,497 INFO L226 Difference]: Without dead ends: 278 [2020-12-23 06:07:49,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:07:49,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-12-23 06:07:49,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 271. [2020-12-23 06:07:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-23 06:07:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 337 transitions. [2020-12-23 06:07:49,504 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 337 transitions. Word has length 230 [2020-12-23 06:07:49,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:49,504 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 337 transitions. [2020-12-23 06:07:49,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 06:07:49,505 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 337 transitions. [2020-12-23 06:07:49,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-23 06:07:49,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:49,506 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:49,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 06:07:49,723 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:49,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:49,724 INFO L82 PathProgramCache]: Analyzing trace with hash -874745738, now seen corresponding path program 33 times [2020-12-23 06:07:49,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:49,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461604687] [2020-12-23 06:07:49,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3729 backedges. 0 proven. 3729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:50,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461604687] [2020-12-23 06:07:50,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614095937] [2020-12-23 06:07:50,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:50,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-23 06:07:50,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:50,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:07:50,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3729 backedges. 0 proven. 3729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:51,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:51,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 06:07:51,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292214608] [2020-12-23 06:07:51,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 06:07:51,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:51,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 06:07:51,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:07:51,065 INFO L87 Difference]: Start difference. First operand 271 states and 337 transitions. Second operand 37 states. [2020-12-23 06:07:51,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:51,312 INFO L93 Difference]: Finished difference Result 290 states and 360 transitions. [2020-12-23 06:07:51,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 06:07:51,313 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 237 [2020-12-23 06:07:51,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:51,316 INFO L225 Difference]: With dead ends: 290 [2020-12-23 06:07:51,316 INFO L226 Difference]: Without dead ends: 286 [2020-12-23 06:07:51,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:07:51,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-12-23 06:07:51,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 279. [2020-12-23 06:07:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-12-23 06:07:51,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 347 transitions. [2020-12-23 06:07:51,324 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 347 transitions. Word has length 237 [2020-12-23 06:07:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:51,325 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 347 transitions. [2020-12-23 06:07:51,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 06:07:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 347 transitions. [2020-12-23 06:07:51,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-12-23 06:07:51,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:51,327 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:51,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 06:07:51,541 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:51,541 INFO L82 PathProgramCache]: Analyzing trace with hash -634962523, now seen corresponding path program 34 times [2020-12-23 06:07:51,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:51,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440232191] [2020-12-23 06:07:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 0 proven. 3961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:52,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440232191] [2020-12-23 06:07:52,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601436774] [2020-12-23 06:07:52,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:52,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:52,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:52,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 06:07:52,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 0 proven. 3961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:52,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:52,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 06:07:52,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051624728] [2020-12-23 06:07:52,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:07:52,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:52,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:07:52,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:07:52,929 INFO L87 Difference]: Start difference. First operand 279 states and 347 transitions. Second operand 38 states. [2020-12-23 06:07:53,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:53,149 INFO L93 Difference]: Finished difference Result 298 states and 370 transitions. [2020-12-23 06:07:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:07:53,150 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 244 [2020-12-23 06:07:53,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:53,153 INFO L225 Difference]: With dead ends: 298 [2020-12-23 06:07:53,153 INFO L226 Difference]: Without dead ends: 294 [2020-12-23 06:07:53,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:07:53,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-12-23 06:07:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 287. [2020-12-23 06:07:53,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-23 06:07:53,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 357 transitions. [2020-12-23 06:07:53,161 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 357 transitions. Word has length 244 [2020-12-23 06:07:53,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:53,162 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 357 transitions. [2020-12-23 06:07:53,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:07:53,162 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 357 transitions. [2020-12-23 06:07:53,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-12-23 06:07:53,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:53,164 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:53,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 06:07:53,376 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:53,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:53,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1742933398, now seen corresponding path program 35 times [2020-12-23 06:07:53,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:53,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509925424] [2020-12-23 06:07:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4200 backedges. 0 proven. 4200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:54,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509925424] [2020-12-23 06:07:54,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056077466] [2020-12-23 06:07:54,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:54,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-23 06:07:54,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:54,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 06:07:54,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4200 backedges. 0 proven. 4200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:54,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:54,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 06:07:54,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202181491] [2020-12-23 06:07:54,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:07:54,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:54,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:07:54,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:07:54,893 INFO L87 Difference]: Start difference. First operand 287 states and 357 transitions. Second operand 39 states. [2020-12-23 06:07:55,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:55,103 INFO L93 Difference]: Finished difference Result 306 states and 380 transitions. [2020-12-23 06:07:55,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:07:55,104 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 251 [2020-12-23 06:07:55,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:55,106 INFO L225 Difference]: With dead ends: 306 [2020-12-23 06:07:55,106 INFO L226 Difference]: Without dead ends: 302 [2020-12-23 06:07:55,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:07:55,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-12-23 06:07:55,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 295. [2020-12-23 06:07:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-12-23 06:07:55,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 367 transitions. [2020-12-23 06:07:55,113 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 367 transitions. Word has length 251 [2020-12-23 06:07:55,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:55,114 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 367 transitions. [2020-12-23 06:07:55,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:07:55,114 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 367 transitions. [2020-12-23 06:07:55,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-12-23 06:07:55,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:55,115 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:55,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 06:07:55,331 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:55,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:55,332 INFO L82 PathProgramCache]: Analyzing trace with hash -536109947, now seen corresponding path program 36 times [2020-12-23 06:07:55,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:55,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829948962] [2020-12-23 06:07:55,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4446 backedges. 0 proven. 4446 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:56,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829948962] [2020-12-23 06:07:56,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187034720] [2020-12-23 06:07:56,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:56,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-23 06:07:56,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:56,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 06:07:56,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4446 backedges. 0 proven. 4446 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:56,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:56,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 06:07:56,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073206920] [2020-12-23 06:07:56,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:07:56,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:56,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:07:56,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:07:56,936 INFO L87 Difference]: Start difference. First operand 295 states and 367 transitions. Second operand 40 states. [2020-12-23 06:07:57,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:57,168 INFO L93 Difference]: Finished difference Result 314 states and 390 transitions. [2020-12-23 06:07:57,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:07:57,168 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 258 [2020-12-23 06:07:57,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:57,170 INFO L225 Difference]: With dead ends: 314 [2020-12-23 06:07:57,171 INFO L226 Difference]: Without dead ends: 310 [2020-12-23 06:07:57,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:07:57,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-12-23 06:07:57,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 303. [2020-12-23 06:07:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-12-23 06:07:57,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 377 transitions. [2020-12-23 06:07:57,179 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 377 transitions. Word has length 258 [2020-12-23 06:07:57,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:57,179 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 377 transitions. [2020-12-23 06:07:57,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:07:57,179 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 377 transitions. [2020-12-23 06:07:57,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-12-23 06:07:57,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:57,181 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:57,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 06:07:57,395 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:57,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:57,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1291858614, now seen corresponding path program 37 times [2020-12-23 06:07:57,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:57,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774342667] [2020-12-23 06:07:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4699 backedges. 0 proven. 4699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:58,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774342667] [2020-12-23 06:07:58,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064070332] [2020-12-23 06:07:58,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:58,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 06:07:58,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4699 backedges. 0 proven. 4699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:59,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:59,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 06:07:59,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668258952] [2020-12-23 06:07:59,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:07:59,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:59,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:07:59,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:07:59,093 INFO L87 Difference]: Start difference. First operand 303 states and 377 transitions. Second operand 41 states. [2020-12-23 06:07:59,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:59,348 INFO L93 Difference]: Finished difference Result 322 states and 400 transitions. [2020-12-23 06:07:59,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 06:07:59,349 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 265 [2020-12-23 06:07:59,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:59,351 INFO L225 Difference]: With dead ends: 322 [2020-12-23 06:07:59,351 INFO L226 Difference]: Without dead ends: 318 [2020-12-23 06:07:59,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:07:59,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-23 06:07:59,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 311. [2020-12-23 06:07:59,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-12-23 06:07:59,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 387 transitions. [2020-12-23 06:07:59,359 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 387 transitions. Word has length 265 [2020-12-23 06:07:59,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:59,359 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 387 transitions. [2020-12-23 06:07:59,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:07:59,360 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 387 transitions. [2020-12-23 06:07:59,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-12-23 06:07:59,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:59,361 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:59,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 06:07:59,575 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:59,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:59,576 INFO L82 PathProgramCache]: Analyzing trace with hash -135236763, now seen corresponding path program 38 times [2020-12-23 06:07:59,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:59,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996145268] [2020-12-23 06:07:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 0 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:00,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996145268] [2020-12-23 06:08:00,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502669616] [2020-12-23 06:08:00,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:00,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:00,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:00,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:08:00,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 0 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:01,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:01,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 06:08:01,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805206705] [2020-12-23 06:08:01,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 06:08:01,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:01,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 06:08:01,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:08:01,215 INFO L87 Difference]: Start difference. First operand 311 states and 387 transitions. Second operand 42 states. [2020-12-23 06:08:01,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:01,500 INFO L93 Difference]: Finished difference Result 330 states and 410 transitions. [2020-12-23 06:08:01,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:08:01,500 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 272 [2020-12-23 06:08:01,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:01,503 INFO L225 Difference]: With dead ends: 330 [2020-12-23 06:08:01,503 INFO L226 Difference]: Without dead ends: 326 [2020-12-23 06:08:01,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:08:01,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-12-23 06:08:01,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 319. [2020-12-23 06:08:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-12-23 06:08:01,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 397 transitions. [2020-12-23 06:08:01,513 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 397 transitions. Word has length 272 [2020-12-23 06:08:01,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:01,514 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 397 transitions. [2020-12-23 06:08:01,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 06:08:01,514 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 397 transitions. [2020-12-23 06:08:01,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-23 06:08:01,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:01,516 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:01,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 06:08:01,731 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:01,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:01,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1831198678, now seen corresponding path program 39 times [2020-12-23 06:08:01,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:01,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369905353] [2020-12-23 06:08:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 0 proven. 5226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:02,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369905353] [2020-12-23 06:08:02,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102774415] [2020-12-23 06:08:02,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:03,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-23 06:08:03,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:03,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 06:08:03,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 0 proven. 5226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:03,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:03,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 06:08:03,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556371602] [2020-12-23 06:08:03,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:08:03,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:03,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:08:03,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:08:03,590 INFO L87 Difference]: Start difference. First operand 319 states and 397 transitions. Second operand 43 states. [2020-12-23 06:08:03,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:03,844 INFO L93 Difference]: Finished difference Result 338 states and 420 transitions. [2020-12-23 06:08:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:08:03,844 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 279 [2020-12-23 06:08:03,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:03,846 INFO L225 Difference]: With dead ends: 338 [2020-12-23 06:08:03,847 INFO L226 Difference]: Without dead ends: 334 [2020-12-23 06:08:03,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:08:03,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-12-23 06:08:03,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 327. [2020-12-23 06:08:03,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-23 06:08:03,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 407 transitions. [2020-12-23 06:08:03,855 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 407 transitions. Word has length 279 [2020-12-23 06:08:03,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:03,855 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 407 transitions. [2020-12-23 06:08:03,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:08:03,855 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 407 transitions. [2020-12-23 06:08:03,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-12-23 06:08:03,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:03,857 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:04,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:04,071 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:04,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2074329669, now seen corresponding path program 40 times [2020-12-23 06:08:04,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:04,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926523389] [2020-12-23 06:08:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5500 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:05,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926523389] [2020-12-23 06:08:05,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599544430] [2020-12-23 06:08:05,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:05,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:05,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:05,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:08:05,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5500 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:05,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:05,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 06:08:05,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532553033] [2020-12-23 06:08:05,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 06:08:05,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:05,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 06:08:05,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:08:05,857 INFO L87 Difference]: Start difference. First operand 327 states and 407 transitions. Second operand 44 states. [2020-12-23 06:08:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:06,091 INFO L93 Difference]: Finished difference Result 346 states and 430 transitions. [2020-12-23 06:08:06,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:08:06,092 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 286 [2020-12-23 06:08:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:06,097 INFO L225 Difference]: With dead ends: 346 [2020-12-23 06:08:06,097 INFO L226 Difference]: Without dead ends: 342 [2020-12-23 06:08:06,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:08:06,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-12-23 06:08:06,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 335. [2020-12-23 06:08:06,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-12-23 06:08:06,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 417 transitions. [2020-12-23 06:08:06,106 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 417 transitions. Word has length 286 [2020-12-23 06:08:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:06,107 INFO L481 AbstractCegarLoop]: Abstraction has 335 states and 417 transitions. [2020-12-23 06:08:06,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 06:08:06,107 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 417 transitions. [2020-12-23 06:08:06,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-12-23 06:08:06,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:06,109 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:06,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:06,324 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:06,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1791366390, now seen corresponding path program 41 times [2020-12-23 06:08:06,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:06,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611076019] [2020-12-23 06:08:06,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5781 backedges. 0 proven. 5781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:07,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611076019] [2020-12-23 06:08:07,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699305879] [2020-12-23 06:08:07,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:07,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-23 06:08:07,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:07,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:08:07,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5781 backedges. 0 proven. 5781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:08,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:08,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 06:08:08,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508540709] [2020-12-23 06:08:08,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 06:08:08,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:08,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 06:08:08,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:08:08,304 INFO L87 Difference]: Start difference. First operand 335 states and 417 transitions. Second operand 45 states. [2020-12-23 06:08:08,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:08,529 INFO L93 Difference]: Finished difference Result 354 states and 440 transitions. [2020-12-23 06:08:08,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 06:08:08,530 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 293 [2020-12-23 06:08:08,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:08,532 INFO L225 Difference]: With dead ends: 354 [2020-12-23 06:08:08,532 INFO L226 Difference]: Without dead ends: 350 [2020-12-23 06:08:08,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:08:08,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-12-23 06:08:08,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 343. [2020-12-23 06:08:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-12-23 06:08:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 427 transitions. [2020-12-23 06:08:08,541 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 427 transitions. Word has length 293 [2020-12-23 06:08:08,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:08,542 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 427 transitions. [2020-12-23 06:08:08,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 06:08:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 427 transitions. [2020-12-23 06:08:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-12-23 06:08:08,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:08,544 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:08,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 06:08:08,758 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:08,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:08,759 INFO L82 PathProgramCache]: Analyzing trace with hash -2072803035, now seen corresponding path program 42 times [2020-12-23 06:08:08,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:08,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319973455] [2020-12-23 06:08:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6069 backedges. 0 proven. 6069 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:10,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319973455] [2020-12-23 06:08:10,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125330534] [2020-12-23 06:08:10,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:10,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-23 06:08:10,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:10,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 06:08:10,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6069 backedges. 0 proven. 6069 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:10,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:10,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-23 06:08:10,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809673630] [2020-12-23 06:08:10,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 06:08:10,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:10,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 06:08:10,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:08:10,843 INFO L87 Difference]: Start difference. First operand 343 states and 427 transitions. Second operand 46 states. [2020-12-23 06:08:11,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:11,135 INFO L93 Difference]: Finished difference Result 362 states and 450 transitions. [2020-12-23 06:08:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 06:08:11,136 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 300 [2020-12-23 06:08:11,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:11,138 INFO L225 Difference]: With dead ends: 362 [2020-12-23 06:08:11,138 INFO L226 Difference]: Without dead ends: 358 [2020-12-23 06:08:11,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:08:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-12-23 06:08:11,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 351. [2020-12-23 06:08:11,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-12-23 06:08:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 437 transitions. [2020-12-23 06:08:11,146 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 437 transitions. Word has length 300 [2020-12-23 06:08:11,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:11,146 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 437 transitions. [2020-12-23 06:08:11,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 06:08:11,146 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 437 transitions. [2020-12-23 06:08:11,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-12-23 06:08:11,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:11,148 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:11,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:11,363 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:11,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:11,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1194143210, now seen corresponding path program 43 times [2020-12-23 06:08:11,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:11,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731016492] [2020-12-23 06:08:11,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6364 backedges. 0 proven. 6364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:12,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731016492] [2020-12-23 06:08:12,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000382060] [2020-12-23 06:08:12,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:13,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 06:08:13,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6364 backedges. 0 proven. 6364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:13,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:13,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-23 06:08:13,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271152352] [2020-12-23 06:08:13,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 06:08:13,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:13,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 06:08:13,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:08:13,438 INFO L87 Difference]: Start difference. First operand 351 states and 437 transitions. Second operand 47 states. [2020-12-23 06:08:13,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:13,688 INFO L93 Difference]: Finished difference Result 370 states and 460 transitions. [2020-12-23 06:08:13,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 06:08:13,688 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 307 [2020-12-23 06:08:13,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:13,690 INFO L225 Difference]: With dead ends: 370 [2020-12-23 06:08:13,690 INFO L226 Difference]: Without dead ends: 366 [2020-12-23 06:08:13,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:08:13,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-12-23 06:08:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 359. [2020-12-23 06:08:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-12-23 06:08:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 447 transitions. [2020-12-23 06:08:13,698 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 447 transitions. Word has length 307 [2020-12-23 06:08:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:13,698 INFO L481 AbstractCegarLoop]: Abstraction has 359 states and 447 transitions. [2020-12-23 06:08:13,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 06:08:13,699 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 447 transitions. [2020-12-23 06:08:13,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-12-23 06:08:13,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:13,701 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:13,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:13,914 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:13,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:13,914 INFO L82 PathProgramCache]: Analyzing trace with hash -886192123, now seen corresponding path program 44 times [2020-12-23 06:08:13,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:13,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199038516] [2020-12-23 06:08:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6666 backedges. 0 proven. 6666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:15,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199038516] [2020-12-23 06:08:15,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956297903] [2020-12-23 06:08:15,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:15,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:15,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:15,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1009 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:08:15,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:16,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6666 backedges. 0 proven. 6666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:16,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:16,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-23 06:08:16,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111060606] [2020-12-23 06:08:16,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 06:08:16,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:16,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 06:08:16,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:08:16,022 INFO L87 Difference]: Start difference. First operand 359 states and 447 transitions. Second operand 48 states. [2020-12-23 06:08:16,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:16,330 INFO L93 Difference]: Finished difference Result 378 states and 470 transitions. [2020-12-23 06:08:16,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 06:08:16,332 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 314 [2020-12-23 06:08:16,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:16,334 INFO L225 Difference]: With dead ends: 378 [2020-12-23 06:08:16,334 INFO L226 Difference]: Without dead ends: 374 [2020-12-23 06:08:16,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:08:16,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-12-23 06:08:16,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 367. [2020-12-23 06:08:16,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-12-23 06:08:16,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 457 transitions. [2020-12-23 06:08:16,342 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 457 transitions. Word has length 314 [2020-12-23 06:08:16,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:16,342 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 457 transitions. [2020-12-23 06:08:16,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 06:08:16,343 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 457 transitions. [2020-12-23 06:08:16,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-12-23 06:08:16,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:16,345 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:16,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 06:08:16,560 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:16,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:16,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1161947338, now seen corresponding path program 45 times [2020-12-23 06:08:16,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:16,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036010439] [2020-12-23 06:08:16,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6975 backedges. 0 proven. 6975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:18,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036010439] [2020-12-23 06:08:18,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228247958] [2020-12-23 06:08:18,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:18,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-23 06:08:18,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:18,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 06:08:18,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6975 backedges. 0 proven. 6975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:18,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:18,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-23 06:08:18,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444056542] [2020-12-23 06:08:18,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 06:08:18,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:18,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 06:08:18,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:08:18,894 INFO L87 Difference]: Start difference. First operand 367 states and 457 transitions. Second operand 49 states. [2020-12-23 06:08:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:19,136 INFO L93 Difference]: Finished difference Result 386 states and 480 transitions. [2020-12-23 06:08:19,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 06:08:19,136 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 321 [2020-12-23 06:08:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:19,138 INFO L225 Difference]: With dead ends: 386 [2020-12-23 06:08:19,138 INFO L226 Difference]: Without dead ends: 382 [2020-12-23 06:08:19,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:08:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-12-23 06:08:19,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 375. [2020-12-23 06:08:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-12-23 06:08:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 467 transitions. [2020-12-23 06:08:19,146 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 467 transitions. Word has length 321 [2020-12-23 06:08:19,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:19,147 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 467 transitions. [2020-12-23 06:08:19,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 06:08:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 467 transitions. [2020-12-23 06:08:19,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-12-23 06:08:19,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:19,149 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:19,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 06:08:19,364 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:19,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:19,364 INFO L82 PathProgramCache]: Analyzing trace with hash -2011136283, now seen corresponding path program 46 times [2020-12-23 06:08:19,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:19,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150862918] [2020-12-23 06:08:19,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7291 backedges. 0 proven. 7291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:21,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150862918] [2020-12-23 06:08:21,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330916890] [2020-12-23 06:08:21,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:21,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:21,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:21,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 06:08:21,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7291 backedges. 0 proven. 7291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:21,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:21,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-23 06:08:21,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413158464] [2020-12-23 06:08:21,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 06:08:21,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:21,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 06:08:21,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:08:21,688 INFO L87 Difference]: Start difference. First operand 375 states and 467 transitions. Second operand 50 states. [2020-12-23 06:08:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:21,966 INFO L93 Difference]: Finished difference Result 394 states and 490 transitions. [2020-12-23 06:08:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 06:08:21,967 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 328 [2020-12-23 06:08:21,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:21,968 INFO L225 Difference]: With dead ends: 394 [2020-12-23 06:08:21,968 INFO L226 Difference]: Without dead ends: 390 [2020-12-23 06:08:21,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:08:21,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-12-23 06:08:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 383. [2020-12-23 06:08:21,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-12-23 06:08:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 477 transitions. [2020-12-23 06:08:21,976 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 477 transitions. Word has length 328 [2020-12-23 06:08:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:21,976 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 477 transitions. [2020-12-23 06:08:21,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 06:08:21,977 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 477 transitions. [2020-12-23 06:08:21,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-12-23 06:08:21,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:21,979 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:22,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 06:08:22,194 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:22,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:22,194 INFO L82 PathProgramCache]: Analyzing trace with hash -461773738, now seen corresponding path program 47 times [2020-12-23 06:08:22,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:22,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568565729] [2020-12-23 06:08:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7614 backedges. 0 proven. 7614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:23,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568565729] [2020-12-23 06:08:23,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586181149] [2020-12-23 06:08:23,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:24,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-23 06:08:24,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:24,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 06:08:24,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7614 backedges. 0 proven. 7614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:24,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:24,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-23 06:08:24,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427425076] [2020-12-23 06:08:24,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 06:08:24,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:24,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 06:08:24,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:08:24,799 INFO L87 Difference]: Start difference. First operand 383 states and 477 transitions. Second operand 51 states. [2020-12-23 06:08:25,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:25,051 INFO L93 Difference]: Finished difference Result 402 states and 500 transitions. [2020-12-23 06:08:25,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 06:08:25,051 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 335 [2020-12-23 06:08:25,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:25,053 INFO L225 Difference]: With dead ends: 402 [2020-12-23 06:08:25,053 INFO L226 Difference]: Without dead ends: 398 [2020-12-23 06:08:25,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:08:25,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-12-23 06:08:25,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 391. [2020-12-23 06:08:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-12-23 06:08:25,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 487 transitions. [2020-12-23 06:08:25,060 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 487 transitions. Word has length 335 [2020-12-23 06:08:25,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:25,061 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 487 transitions. [2020-12-23 06:08:25,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 06:08:25,061 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 487 transitions. [2020-12-23 06:08:25,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-12-23 06:08:25,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:25,063 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:25,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:25,278 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:25,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:25,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1394191813, now seen corresponding path program 48 times [2020-12-23 06:08:25,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:25,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214112141] [2020-12-23 06:08:25,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7944 backedges. 0 proven. 7944 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:27,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214112141] [2020-12-23 06:08:27,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253736981] [2020-12-23 06:08:27,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:27,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-23 06:08:27,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:27,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 06:08:27,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7944 backedges. 0 proven. 7944 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:27,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:27,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-23 06:08:27,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634895557] [2020-12-23 06:08:27,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 06:08:27,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:27,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 06:08:27,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:08:27,980 INFO L87 Difference]: Start difference. First operand 391 states and 487 transitions. Second operand 52 states. [2020-12-23 06:08:28,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:28,379 INFO L93 Difference]: Finished difference Result 410 states and 510 transitions. [2020-12-23 06:08:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 06:08:28,379 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 342 [2020-12-23 06:08:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:28,381 INFO L225 Difference]: With dead ends: 410 [2020-12-23 06:08:28,381 INFO L226 Difference]: Without dead ends: 406 [2020-12-23 06:08:28,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:08:28,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-12-23 06:08:28,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 399. [2020-12-23 06:08:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-12-23 06:08:28,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 497 transitions. [2020-12-23 06:08:28,389 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 497 transitions. Word has length 342 [2020-12-23 06:08:28,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:28,389 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 497 transitions. [2020-12-23 06:08:28,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 06:08:28,389 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 497 transitions. [2020-12-23 06:08:28,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-12-23 06:08:28,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:28,392 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:28,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 06:08:28,605 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:28,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:28,605 INFO L82 PathProgramCache]: Analyzing trace with hash -629655178, now seen corresponding path program 49 times [2020-12-23 06:08:28,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:28,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543582945] [2020-12-23 06:08:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:30,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543582945] [2020-12-23 06:08:30,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371763551] [2020-12-23 06:08:30,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:30,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:08:30,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:31,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:31,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-23 06:08:31,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068750350] [2020-12-23 06:08:31,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 06:08:31,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:31,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 06:08:31,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:08:31,224 INFO L87 Difference]: Start difference. First operand 399 states and 497 transitions. Second operand 53 states. [2020-12-23 06:08:31,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:31,618 INFO L93 Difference]: Finished difference Result 418 states and 520 transitions. [2020-12-23 06:08:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 06:08:31,618 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 349 [2020-12-23 06:08:31,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:31,620 INFO L225 Difference]: With dead ends: 418 [2020-12-23 06:08:31,621 INFO L226 Difference]: Without dead ends: 414 [2020-12-23 06:08:31,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:08:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-12-23 06:08:31,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 407. [2020-12-23 06:08:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-12-23 06:08:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 507 transitions. [2020-12-23 06:08:31,627 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 507 transitions. Word has length 349 [2020-12-23 06:08:31,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:31,628 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 507 transitions. [2020-12-23 06:08:31,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 06:08:31,628 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 507 transitions. [2020-12-23 06:08:31,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2020-12-23 06:08:31,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:31,630 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:31,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:31,846 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:31,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:31,846 INFO L82 PathProgramCache]: Analyzing trace with hash 57103525, now seen corresponding path program 50 times [2020-12-23 06:08:31,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:31,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004363057] [2020-12-23 06:08:31,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8625 backedges. 0 proven. 8625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:33,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004363057] [2020-12-23 06:08:33,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586318098] [2020-12-23 06:08:33,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:34,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:34,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:34,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 06:08:34,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8625 backedges. 0 proven. 8625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:34,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:34,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-23 06:08:34,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590291316] [2020-12-23 06:08:34,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 06:08:34,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:34,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 06:08:34,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:08:34,604 INFO L87 Difference]: Start difference. First operand 407 states and 507 transitions. Second operand 54 states. [2020-12-23 06:08:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:34,941 INFO L93 Difference]: Finished difference Result 426 states and 530 transitions. [2020-12-23 06:08:34,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 06:08:34,941 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 356 [2020-12-23 06:08:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:34,943 INFO L225 Difference]: With dead ends: 426 [2020-12-23 06:08:34,943 INFO L226 Difference]: Without dead ends: 422 [2020-12-23 06:08:34,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:08:34,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-12-23 06:08:34,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 415. [2020-12-23 06:08:34,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-12-23 06:08:34,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 517 transitions. [2020-12-23 06:08:34,951 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 517 transitions. Word has length 356 [2020-12-23 06:08:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:34,951 INFO L481 AbstractCegarLoop]: Abstraction has 415 states and 517 transitions. [2020-12-23 06:08:34,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 06:08:34,951 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 517 transitions. [2020-12-23 06:08:34,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2020-12-23 06:08:34,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:34,954 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:35,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:35,169 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1851058538, now seen corresponding path program 51 times [2020-12-23 06:08:35,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:35,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482662647] [2020-12-23 06:08:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8976 backedges. 0 proven. 8976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:37,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482662647] [2020-12-23 06:08:37,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663973054] [2020-12-23 06:08:37,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:37,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-12-23 06:08:37,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:37,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 06:08:37,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8976 backedges. 0 proven. 8976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:38,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:38,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-23 06:08:38,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789116163] [2020-12-23 06:08:38,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 06:08:38,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:38,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 06:08:38,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:08:38,089 INFO L87 Difference]: Start difference. First operand 415 states and 517 transitions. Second operand 55 states. [2020-12-23 06:08:38,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:38,505 INFO L93 Difference]: Finished difference Result 434 states and 540 transitions. [2020-12-23 06:08:38,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 06:08:38,506 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 363 [2020-12-23 06:08:38,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:38,507 INFO L225 Difference]: With dead ends: 434 [2020-12-23 06:08:38,507 INFO L226 Difference]: Without dead ends: 430 [2020-12-23 06:08:38,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:08:38,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-12-23 06:08:38,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 423. [2020-12-23 06:08:38,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2020-12-23 06:08:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 527 transitions. [2020-12-23 06:08:38,515 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 527 transitions. Word has length 363 [2020-12-23 06:08:38,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:38,516 INFO L481 AbstractCegarLoop]: Abstraction has 423 states and 527 transitions. [2020-12-23 06:08:38,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 06:08:38,518 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 527 transitions. [2020-12-23 06:08:38,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-12-23 06:08:38,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:38,522 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:38,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-23 06:08:38,736 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:38,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:38,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1881705595, now seen corresponding path program 52 times [2020-12-23 06:08:38,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:38,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592186300] [2020-12-23 06:08:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9334 backedges. 0 proven. 9334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:40,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592186300] [2020-12-23 06:08:40,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986566871] [2020-12-23 06:08:40,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:41,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:41,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:41,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 06:08:41,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9334 backedges. 0 proven. 9334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:41,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:41,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-23 06:08:41,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812120207] [2020-12-23 06:08:41,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 06:08:41,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:41,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 06:08:41,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:08:41,648 INFO L87 Difference]: Start difference. First operand 423 states and 527 transitions. Second operand 56 states. [2020-12-23 06:08:41,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:41,990 INFO L93 Difference]: Finished difference Result 442 states and 550 transitions. [2020-12-23 06:08:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 06:08:41,990 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 370 [2020-12-23 06:08:41,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:41,992 INFO L225 Difference]: With dead ends: 442 [2020-12-23 06:08:41,992 INFO L226 Difference]: Without dead ends: 438 [2020-12-23 06:08:41,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:08:41,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-12-23 06:08:41,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 431. [2020-12-23 06:08:41,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2020-12-23 06:08:41,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 537 transitions. [2020-12-23 06:08:41,998 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 537 transitions. Word has length 370 [2020-12-23 06:08:41,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:41,998 INFO L481 AbstractCegarLoop]: Abstraction has 431 states and 537 transitions. [2020-12-23 06:08:41,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 06:08:41,998 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 537 transitions. [2020-12-23 06:08:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-12-23 06:08:42,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:42,000 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:42,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:42,201 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:42,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1870953398, now seen corresponding path program 53 times [2020-12-23 06:08:42,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:42,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026929852] [2020-12-23 06:08:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9699 backedges. 0 proven. 9699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:44,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026929852] [2020-12-23 06:08:44,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339557639] [2020-12-23 06:08:44,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:44,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2020-12-23 06:08:44,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:44,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 06:08:44,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9699 backedges. 0 proven. 9699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:45,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:45,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-23 06:08:45,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633702540] [2020-12-23 06:08:45,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 06:08:45,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:45,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 06:08:45,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:08:45,396 INFO L87 Difference]: Start difference. First operand 431 states and 537 transitions. Second operand 57 states. [2020-12-23 06:08:45,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:45,783 INFO L93 Difference]: Finished difference Result 450 states and 560 transitions. [2020-12-23 06:08:45,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 06:08:45,784 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 377 [2020-12-23 06:08:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:45,785 INFO L225 Difference]: With dead ends: 450 [2020-12-23 06:08:45,786 INFO L226 Difference]: Without dead ends: 446 [2020-12-23 06:08:45,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:08:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-12-23 06:08:45,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 439. [2020-12-23 06:08:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-12-23 06:08:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 547 transitions. [2020-12-23 06:08:45,790 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 547 transitions. Word has length 377 [2020-12-23 06:08:45,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:45,791 INFO L481 AbstractCegarLoop]: Abstraction has 439 states and 547 transitions. [2020-12-23 06:08:45,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 06:08:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 547 transitions. [2020-12-23 06:08:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2020-12-23 06:08:45,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:45,792 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:45,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 06:08:45,993 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:45,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:45,994 INFO L82 PathProgramCache]: Analyzing trace with hash -289928603, now seen corresponding path program 54 times [2020-12-23 06:08:45,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:45,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406135019] [2020-12-23 06:08:45,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10071 backedges. 0 proven. 10071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:48,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406135019] [2020-12-23 06:08:48,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744398634] [2020-12-23 06:08:48,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:48,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-12-23 06:08:48,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:48,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 06:08:48,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10071 backedges. 0 proven. 10071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:49,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:49,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-23 06:08:49,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304521871] [2020-12-23 06:08:49,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 06:08:49,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:49,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 06:08:49,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:08:49,303 INFO L87 Difference]: Start difference. First operand 439 states and 547 transitions. Second operand 58 states. [2020-12-23 06:08:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:49,670 INFO L93 Difference]: Finished difference Result 458 states and 570 transitions. [2020-12-23 06:08:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 06:08:49,670 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 384 [2020-12-23 06:08:49,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:49,672 INFO L225 Difference]: With dead ends: 458 [2020-12-23 06:08:49,672 INFO L226 Difference]: Without dead ends: 454 [2020-12-23 06:08:49,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:08:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-12-23 06:08:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 447. [2020-12-23 06:08:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-12-23 06:08:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 557 transitions. [2020-12-23 06:08:49,679 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 557 transitions. Word has length 384 [2020-12-23 06:08:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:49,680 INFO L481 AbstractCegarLoop]: Abstraction has 447 states and 557 transitions. [2020-12-23 06:08:49,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 06:08:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 557 transitions. [2020-12-23 06:08:49,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-12-23 06:08:49,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:49,683 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:49,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 06:08:49,898 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:49,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:49,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1777756374, now seen corresponding path program 55 times [2020-12-23 06:08:49,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:49,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982546149] [2020-12-23 06:08:49,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 0 proven. 10450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:52,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982546149] [2020-12-23 06:08:52,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201882152] [2020-12-23 06:08:52,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:52,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1251 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 06:08:52,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 0 proven. 10450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:53,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:53,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-23 06:08:53,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374192731] [2020-12-23 06:08:53,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 06:08:53,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:53,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 06:08:53,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:08:53,109 INFO L87 Difference]: Start difference. First operand 447 states and 557 transitions. Second operand 59 states. [2020-12-23 06:08:53,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:53,640 INFO L93 Difference]: Finished difference Result 466 states and 580 transitions. [2020-12-23 06:08:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 06:08:53,640 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 391 [2020-12-23 06:08:53,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:53,642 INFO L225 Difference]: With dead ends: 466 [2020-12-23 06:08:53,642 INFO L226 Difference]: Without dead ends: 462 [2020-12-23 06:08:53,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:08:53,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-12-23 06:08:53,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 455. [2020-12-23 06:08:53,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-12-23 06:08:53,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 567 transitions. [2020-12-23 06:08:53,661 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 567 transitions. Word has length 391 [2020-12-23 06:08:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:53,661 INFO L481 AbstractCegarLoop]: Abstraction has 455 states and 567 transitions. [2020-12-23 06:08:53,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 06:08:53,661 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 567 transitions. [2020-12-23 06:08:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2020-12-23 06:08:53,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:53,664 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:53,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:53,865 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:53,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:53,865 INFO L82 PathProgramCache]: Analyzing trace with hash -170452667, now seen corresponding path program 56 times [2020-12-23 06:08:53,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:53,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271196064] [2020-12-23 06:08:53,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10836 backedges. 0 proven. 10836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:56,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271196064] [2020-12-23 06:08:56,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745947476] [2020-12-23 06:08:56,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:56,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:56,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:56,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 06:08:56,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10836 backedges. 0 proven. 10836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:57,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:57,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-23 06:08:57,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918401501] [2020-12-23 06:08:57,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 06:08:57,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:57,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 06:08:57,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:08:57,159 INFO L87 Difference]: Start difference. First operand 455 states and 567 transitions. Second operand 60 states. [2020-12-23 06:08:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:57,516 INFO L93 Difference]: Finished difference Result 474 states and 590 transitions. [2020-12-23 06:08:57,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 06:08:57,517 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 398 [2020-12-23 06:08:57,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:57,519 INFO L225 Difference]: With dead ends: 474 [2020-12-23 06:08:57,519 INFO L226 Difference]: Without dead ends: 470 [2020-12-23 06:08:57,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:08:57,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-12-23 06:08:57,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 463. [2020-12-23 06:08:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2020-12-23 06:08:57,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 577 transitions. [2020-12-23 06:08:57,526 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 577 transitions. Word has length 398 [2020-12-23 06:08:57,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:57,526 INFO L481 AbstractCegarLoop]: Abstraction has 463 states and 577 transitions. [2020-12-23 06:08:57,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 06:08:57,526 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 577 transitions. [2020-12-23 06:08:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2020-12-23 06:08:57,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:57,529 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:57,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-23 06:08:57,744 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:57,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:57,744 INFO L82 PathProgramCache]: Analyzing trace with hash 661839350, now seen corresponding path program 57 times [2020-12-23 06:08:57,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:57,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679895504] [2020-12-23 06:08:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11229 backedges. 0 proven. 11229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:00,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679895504] [2020-12-23 06:09:00,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859522994] [2020-12-23 06:09:00,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:00,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2020-12-23 06:09:00,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:00,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 1295 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 06:09:00,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11229 backedges. 0 proven. 11229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:01,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:01,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-23 06:09:01,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822195135] [2020-12-23 06:09:01,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 06:09:01,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:01,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 06:09:01,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:09:01,366 INFO L87 Difference]: Start difference. First operand 463 states and 577 transitions. Second operand 61 states. [2020-12-23 06:09:01,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:01,749 INFO L93 Difference]: Finished difference Result 482 states and 600 transitions. [2020-12-23 06:09:01,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 06:09:01,750 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 405 [2020-12-23 06:09:01,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:01,752 INFO L225 Difference]: With dead ends: 482 [2020-12-23 06:09:01,752 INFO L226 Difference]: Without dead ends: 478 [2020-12-23 06:09:01,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:09:01,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-12-23 06:09:01,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 471. [2020-12-23 06:09:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-12-23 06:09:01,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 587 transitions. [2020-12-23 06:09:01,757 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 587 transitions. Word has length 405 [2020-12-23 06:09:01,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:01,757 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 587 transitions. [2020-12-23 06:09:01,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 06:09:01,758 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 587 transitions. [2020-12-23 06:09:01,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2020-12-23 06:09:01,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:01,759 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:01,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:01,967 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:01,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:01,967 INFO L82 PathProgramCache]: Analyzing trace with hash 981639205, now seen corresponding path program 58 times [2020-12-23 06:09:01,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:01,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079846870] [2020-12-23 06:09:01,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11629 backedges. 0 proven. 11629 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:04,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079846870] [2020-12-23 06:09:04,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708577296] [2020-12-23 06:09:04,586 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:04,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:09:04,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:04,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1317 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 06:09:04,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11629 backedges. 0 proven. 11629 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:05,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:05,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-23 06:09:05,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410515014] [2020-12-23 06:09:05,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 06:09:05,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:05,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 06:09:05,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:09:05,496 INFO L87 Difference]: Start difference. First operand 471 states and 587 transitions. Second operand 62 states. [2020-12-23 06:09:06,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:06,081 INFO L93 Difference]: Finished difference Result 490 states and 610 transitions. [2020-12-23 06:09:06,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 06:09:06,082 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 412 [2020-12-23 06:09:06,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:06,084 INFO L225 Difference]: With dead ends: 490 [2020-12-23 06:09:06,084 INFO L226 Difference]: Without dead ends: 486 [2020-12-23 06:09:06,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:09:06,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-12-23 06:09:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 479. [2020-12-23 06:09:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2020-12-23 06:09:06,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 597 transitions. [2020-12-23 06:09:06,091 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 597 transitions. Word has length 412 [2020-12-23 06:09:06,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:06,091 INFO L481 AbstractCegarLoop]: Abstraction has 479 states and 597 transitions. [2020-12-23 06:09:06,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 06:09:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 597 transitions. [2020-12-23 06:09:06,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-12-23 06:09:06,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:06,094 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:06,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 06:09:06,311 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:06,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:06,312 INFO L82 PathProgramCache]: Analyzing trace with hash 518773526, now seen corresponding path program 59 times [2020-12-23 06:09:06,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:06,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272075369] [2020-12-23 06:09:06,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12036 backedges. 0 proven. 12036 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:09,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272075369] [2020-12-23 06:09:09,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002692533] [2020-12-23 06:09:09,028 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:09,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2020-12-23 06:09:09,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:09,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 1339 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 06:09:09,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12036 backedges. 0 proven. 12036 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:10,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:10,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-23 06:09:10,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955504680] [2020-12-23 06:09:10,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 06:09:10,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:10,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 06:09:10,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:09:10,144 INFO L87 Difference]: Start difference. First operand 479 states and 597 transitions. Second operand 63 states. [2020-12-23 06:09:10,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:10,529 INFO L93 Difference]: Finished difference Result 498 states and 620 transitions. [2020-12-23 06:09:10,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 06:09:10,530 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 419 [2020-12-23 06:09:10,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:10,532 INFO L225 Difference]: With dead ends: 498 [2020-12-23 06:09:10,532 INFO L226 Difference]: Without dead ends: 494 [2020-12-23 06:09:10,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:09:10,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2020-12-23 06:09:10,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 487. [2020-12-23 06:09:10,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2020-12-23 06:09:10,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 607 transitions. [2020-12-23 06:09:10,537 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 607 transitions. Word has length 419 [2020-12-23 06:09:10,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:10,537 INFO L481 AbstractCegarLoop]: Abstraction has 487 states and 607 transitions. [2020-12-23 06:09:10,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 06:09:10,537 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 607 transitions. [2020-12-23 06:09:10,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2020-12-23 06:09:10,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:10,539 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:10,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:10,740 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:10,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:10,741 INFO L82 PathProgramCache]: Analyzing trace with hash -242704635, now seen corresponding path program 60 times [2020-12-23 06:09:10,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:10,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600676850] [2020-12-23 06:09:10,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12450 backedges. 0 proven. 12450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:13,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600676850] [2020-12-23 06:09:13,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346317224] [2020-12-23 06:09:13,597 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:14,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2020-12-23 06:09:14,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:14,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 06:09:14,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12450 backedges. 0 proven. 12450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:14,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:14,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-23 06:09:14,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511557349] [2020-12-23 06:09:14,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 06:09:14,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:14,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 06:09:14,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:09:14,673 INFO L87 Difference]: Start difference. First operand 487 states and 607 transitions. Second operand 64 states. [2020-12-23 06:09:15,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:15,159 INFO L93 Difference]: Finished difference Result 506 states and 630 transitions. [2020-12-23 06:09:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 06:09:15,160 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 426 [2020-12-23 06:09:15,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:15,162 INFO L225 Difference]: With dead ends: 506 [2020-12-23 06:09:15,162 INFO L226 Difference]: Without dead ends: 502 [2020-12-23 06:09:15,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:09:15,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-12-23 06:09:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 495. [2020-12-23 06:09:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-12-23 06:09:15,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 617 transitions. [2020-12-23 06:09:15,168 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 617 transitions. Word has length 426 [2020-12-23 06:09:15,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:15,169 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 617 transitions. [2020-12-23 06:09:15,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 06:09:15,169 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 617 transitions. [2020-12-23 06:09:15,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-12-23 06:09:15,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:15,171 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:15,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-12-23 06:09:15,371 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:15,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:15,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1210884042, now seen corresponding path program 61 times [2020-12-23 06:09:15,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:15,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200860284] [2020-12-23 06:09:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12871 backedges. 0 proven. 12871 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:18,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200860284] [2020-12-23 06:09:18,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157763297] [2020-12-23 06:09:18,270 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:18,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 06:09:18,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12871 backedges. 0 proven. 12871 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:19,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:19,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2020-12-23 06:09:19,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872563449] [2020-12-23 06:09:19,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 06:09:19,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:19,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 06:09:19,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:09:19,239 INFO L87 Difference]: Start difference. First operand 495 states and 617 transitions. Second operand 65 states. [2020-12-23 06:09:19,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:19,894 INFO L93 Difference]: Finished difference Result 514 states and 640 transitions. [2020-12-23 06:09:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 06:09:19,895 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 433 [2020-12-23 06:09:19,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:19,899 INFO L225 Difference]: With dead ends: 514 [2020-12-23 06:09:19,899 INFO L226 Difference]: Without dead ends: 510 [2020-12-23 06:09:19,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:09:19,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2020-12-23 06:09:19,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 503. [2020-12-23 06:09:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2020-12-23 06:09:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 627 transitions. [2020-12-23 06:09:19,907 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 627 transitions. Word has length 433 [2020-12-23 06:09:19,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:19,908 INFO L481 AbstractCegarLoop]: Abstraction has 503 states and 627 transitions. [2020-12-23 06:09:19,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 06:09:19,908 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 627 transitions. [2020-12-23 06:09:19,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2020-12-23 06:09:19,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:19,912 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:20,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:20,126 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:20,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:20,127 INFO L82 PathProgramCache]: Analyzing trace with hash -818473499, now seen corresponding path program 62 times [2020-12-23 06:09:20,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:20,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267717879] [2020-12-23 06:09:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13299 backedges. 0 proven. 13299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:23,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267717879] [2020-12-23 06:09:23,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405803202] [2020-12-23 06:09:23,112 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:23,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:09:23,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:23,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 06:09:23,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 13299 backedges. 0 proven. 13299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:24,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:24,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-23 06:09:24,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647169382] [2020-12-23 06:09:24,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 06:09:24,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:24,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 06:09:24,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:09:24,078 INFO L87 Difference]: Start difference. First operand 503 states and 627 transitions. Second operand 66 states. [2020-12-23 06:09:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:24,686 INFO L93 Difference]: Finished difference Result 522 states and 650 transitions. [2020-12-23 06:09:24,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 06:09:24,686 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 440 [2020-12-23 06:09:24,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:24,689 INFO L225 Difference]: With dead ends: 522 [2020-12-23 06:09:24,689 INFO L226 Difference]: Without dead ends: 518 [2020-12-23 06:09:24,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:09:24,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-12-23 06:09:24,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 511. [2020-12-23 06:09:24,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-12-23 06:09:24,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 637 transitions. [2020-12-23 06:09:24,695 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 637 transitions. Word has length 440 [2020-12-23 06:09:24,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:24,695 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 637 transitions. [2020-12-23 06:09:24,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 06:09:24,695 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 637 transitions. [2020-12-23 06:09:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-12-23 06:09:24,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:24,698 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:24,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-12-23 06:09:24,904 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:24,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:24,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1780182358, now seen corresponding path program 63 times [2020-12-23 06:09:24,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:24,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937705874] [2020-12-23 06:09:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 13734 backedges. 0 proven. 13734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:28,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937705874] [2020-12-23 06:09:28,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549798395] [2020-12-23 06:09:28,006 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:28,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2020-12-23 06:09:28,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:28,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 06:09:28,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 13734 backedges. 0 proven. 13734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:29,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:29,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-23 06:09:29,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300901503] [2020-12-23 06:09:29,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 06:09:29,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:29,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 06:09:29,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:09:29,228 INFO L87 Difference]: Start difference. First operand 511 states and 637 transitions. Second operand 67 states. [2020-12-23 06:09:29,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:29,876 INFO L93 Difference]: Finished difference Result 530 states and 660 transitions. [2020-12-23 06:09:29,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 06:09:29,877 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 447 [2020-12-23 06:09:29,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:29,879 INFO L225 Difference]: With dead ends: 530 [2020-12-23 06:09:29,879 INFO L226 Difference]: Without dead ends: 526 [2020-12-23 06:09:29,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:09:29,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-12-23 06:09:29,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 519. [2020-12-23 06:09:29,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2020-12-23 06:09:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 647 transitions. [2020-12-23 06:09:29,887 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 647 transitions. Word has length 447 [2020-12-23 06:09:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:29,887 INFO L481 AbstractCegarLoop]: Abstraction has 519 states and 647 transitions. [2020-12-23 06:09:29,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 06:09:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 647 transitions. [2020-12-23 06:09:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2020-12-23 06:09:29,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:29,889 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:30,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:30,090 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:30,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:30,091 INFO L82 PathProgramCache]: Analyzing trace with hash -413399867, now seen corresponding path program 64 times [2020-12-23 06:09:30,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:30,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006983955] [2020-12-23 06:09:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 14176 backedges. 0 proven. 14176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:33,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006983955] [2020-12-23 06:09:33,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219776851] [2020-12-23 06:09:33,302 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:33,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:09:33,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:33,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 1449 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 06:09:33,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 14176 backedges. 0 proven. 14176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:34,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:34,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-23 06:09:34,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970927812] [2020-12-23 06:09:34,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 06:09:34,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:34,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 06:09:34,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:09:34,349 INFO L87 Difference]: Start difference. First operand 519 states and 647 transitions. Second operand 68 states. [2020-12-23 06:09:35,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:35,098 INFO L93 Difference]: Finished difference Result 538 states and 670 transitions. [2020-12-23 06:09:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-23 06:09:35,098 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 454 [2020-12-23 06:09:35,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:35,102 INFO L225 Difference]: With dead ends: 538 [2020-12-23 06:09:35,102 INFO L226 Difference]: Without dead ends: 534 [2020-12-23 06:09:35,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:09:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2020-12-23 06:09:35,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 527. [2020-12-23 06:09:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2020-12-23 06:09:35,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 657 transitions. [2020-12-23 06:09:35,108 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 657 transitions. Word has length 454 [2020-12-23 06:09:35,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:35,108 INFO L481 AbstractCegarLoop]: Abstraction has 527 states and 657 transitions. [2020-12-23 06:09:35,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 06:09:35,108 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 657 transitions. [2020-12-23 06:09:35,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-12-23 06:09:35,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:35,110 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:35,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-23 06:09:35,314 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:35,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:35,314 INFO L82 PathProgramCache]: Analyzing trace with hash -566885770, now seen corresponding path program 65 times [2020-12-23 06:09:35,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:35,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070520090] [2020-12-23 06:09:35,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 14625 backedges. 0 proven. 14625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:38,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070520090] [2020-12-23 06:09:38,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912128083] [2020-12-23 06:09:38,630 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:39,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-12-23 06:09:39,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:39,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 06:09:39,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 14625 backedges. 0 proven. 14625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:40,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:40,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-23 06:09:40,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353541774] [2020-12-23 06:09:40,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 06:09:40,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:40,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 06:09:40,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:09:40,021 INFO L87 Difference]: Start difference. First operand 527 states and 657 transitions. Second operand 69 states. [2020-12-23 06:09:40,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:40,864 INFO L93 Difference]: Finished difference Result 546 states and 680 transitions. [2020-12-23 06:09:40,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 06:09:40,864 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 461 [2020-12-23 06:09:40,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:40,866 INFO L225 Difference]: With dead ends: 546 [2020-12-23 06:09:40,866 INFO L226 Difference]: Without dead ends: 542 [2020-12-23 06:09:40,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:09:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2020-12-23 06:09:40,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 535. [2020-12-23 06:09:40,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-12-23 06:09:40,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 667 transitions. [2020-12-23 06:09:40,874 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 667 transitions. Word has length 461 [2020-12-23 06:09:40,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:40,875 INFO L481 AbstractCegarLoop]: Abstraction has 535 states and 667 transitions. [2020-12-23 06:09:40,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 06:09:40,875 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 667 transitions. [2020-12-23 06:09:40,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-12-23 06:09:40,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:40,878 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:41,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 06:09:41,092 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:41,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:41,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1924830299, now seen corresponding path program 66 times [2020-12-23 06:09:41,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:41,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771376663] [2020-12-23 06:09:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 15081 backedges. 0 proven. 15081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:44,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771376663] [2020-12-23 06:09:44,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919722015] [2020-12-23 06:09:44,550 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:45,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2020-12-23 06:09:45,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:45,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 1493 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-23 06:09:45,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 15081 backedges. 0 proven. 15081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:45,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:45,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-23 06:09:45,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762454008] [2020-12-23 06:09:45,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 06:09:45,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:45,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 06:09:45,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:09:45,858 INFO L87 Difference]: Start difference. First operand 535 states and 667 transitions. Second operand 70 states. [2020-12-23 06:09:46,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:46,415 INFO L93 Difference]: Finished difference Result 554 states and 690 transitions. [2020-12-23 06:09:46,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 06:09:46,415 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 468 [2020-12-23 06:09:46,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:46,417 INFO L225 Difference]: With dead ends: 554 [2020-12-23 06:09:46,417 INFO L226 Difference]: Without dead ends: 550 [2020-12-23 06:09:46,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:09:46,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2020-12-23 06:09:46,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 543. [2020-12-23 06:09:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2020-12-23 06:09:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 677 transitions. [2020-12-23 06:09:46,425 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 677 transitions. Word has length 468 [2020-12-23 06:09:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:46,426 INFO L481 AbstractCegarLoop]: Abstraction has 543 states and 677 transitions. [2020-12-23 06:09:46,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 06:09:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 677 transitions. [2020-12-23 06:09:46,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-12-23 06:09:46,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:46,429 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:46,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-23 06:09:46,629 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:46,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:46,630 INFO L82 PathProgramCache]: Analyzing trace with hash 219488150, now seen corresponding path program 67 times [2020-12-23 06:09:46,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:46,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349396361] [2020-12-23 06:09:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15544 backedges. 0 proven. 15544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:50,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349396361] [2020-12-23 06:09:50,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673988598] [2020-12-23 06:09:50,158 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:50,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 1515 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 06:09:50,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15544 backedges. 0 proven. 15544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:51,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:51,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2020-12-23 06:09:51,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214304502] [2020-12-23 06:09:51,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-23 06:09:51,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:51,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-23 06:09:51,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:09:51,228 INFO L87 Difference]: Start difference. First operand 543 states and 677 transitions. Second operand 71 states. [2020-12-23 06:09:51,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:51,954 INFO L93 Difference]: Finished difference Result 562 states and 700 transitions. [2020-12-23 06:09:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 06:09:51,955 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 475 [2020-12-23 06:09:51,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:51,958 INFO L225 Difference]: With dead ends: 562 [2020-12-23 06:09:51,958 INFO L226 Difference]: Without dead ends: 558 [2020-12-23 06:09:51,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:09:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2020-12-23 06:09:51,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 551. [2020-12-23 06:09:51,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-12-23 06:09:51,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 687 transitions. [2020-12-23 06:09:51,965 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 687 transitions. Word has length 475 [2020-12-23 06:09:51,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:51,966 INFO L481 AbstractCegarLoop]: Abstraction has 551 states and 687 transitions. [2020-12-23 06:09:51,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-23 06:09:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 687 transitions. [2020-12-23 06:09:51,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-12-23 06:09:51,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:51,968 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:52,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:52,169 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:52,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:52,170 INFO L82 PathProgramCache]: Analyzing trace with hash 868305541, now seen corresponding path program 68 times [2020-12-23 06:09:52,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:52,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507155819] [2020-12-23 06:09:52,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16014 backedges. 0 proven. 16014 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:55,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507155819] [2020-12-23 06:09:55,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765535690] [2020-12-23 06:09:55,801 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:56,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:09:56,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:56,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 1537 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 06:09:56,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16014 backedges. 0 proven. 16014 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:56,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:56,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-23 06:09:56,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087339199] [2020-12-23 06:09:56,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 06:09:56,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:56,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 06:09:56,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:09:56,891 INFO L87 Difference]: Start difference. First operand 551 states and 687 transitions. Second operand 72 states. [2020-12-23 06:09:57,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:57,724 INFO L93 Difference]: Finished difference Result 570 states and 710 transitions. [2020-12-23 06:09:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 06:09:57,724 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 482 [2020-12-23 06:09:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:57,726 INFO L225 Difference]: With dead ends: 570 [2020-12-23 06:09:57,726 INFO L226 Difference]: Without dead ends: 566 [2020-12-23 06:09:57,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:09:57,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2020-12-23 06:09:57,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 559. [2020-12-23 06:09:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-12-23 06:09:57,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 697 transitions. [2020-12-23 06:09:57,733 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 697 transitions. Word has length 482 [2020-12-23 06:09:57,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:57,733 INFO L481 AbstractCegarLoop]: Abstraction has 559 states and 697 transitions. [2020-12-23 06:09:57,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 06:09:57,733 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 697 transitions. [2020-12-23 06:09:57,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-12-23 06:09:57,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:57,735 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:57,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-23 06:09:57,936 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:57,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:57,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1613415606, now seen corresponding path program 69 times [2020-12-23 06:09:57,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:57,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106318184] [2020-12-23 06:09:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16491 backedges. 0 proven. 16491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:01,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106318184] [2020-12-23 06:10:01,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712365220] [2020-12-23 06:10:01,720 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:02,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2020-12-23 06:10:02,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:02,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 1559 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 06:10:02,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16491 backedges. 0 proven. 16491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:03,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:03,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-23 06:10:03,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401415697] [2020-12-23 06:10:03,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-23 06:10:03,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:03,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-23 06:10:03,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:10:03,111 INFO L87 Difference]: Start difference. First operand 559 states and 697 transitions. Second operand 73 states. [2020-12-23 06:10:04,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:04,079 INFO L93 Difference]: Finished difference Result 578 states and 720 transitions. [2020-12-23 06:10:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 06:10:04,080 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 489 [2020-12-23 06:10:04,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:04,082 INFO L225 Difference]: With dead ends: 578 [2020-12-23 06:10:04,082 INFO L226 Difference]: Without dead ends: 574 [2020-12-23 06:10:04,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:10:04,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-12-23 06:10:04,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 567. [2020-12-23 06:10:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-12-23 06:10:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 707 transitions. [2020-12-23 06:10:04,088 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 707 transitions. Word has length 489 [2020-12-23 06:10:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:04,088 INFO L481 AbstractCegarLoop]: Abstraction has 567 states and 707 transitions. [2020-12-23 06:10:04,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-23 06:10:04,088 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 707 transitions. [2020-12-23 06:10:04,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-12-23 06:10:04,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:04,091 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:04,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:04,291 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:04,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:04,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1293787493, now seen corresponding path program 70 times [2020-12-23 06:10:04,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:04,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83482715] [2020-12-23 06:10:04,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16975 backedges. 0 proven. 16975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:08,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83482715] [2020-12-23 06:10:08,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770021974] [2020-12-23 06:10:08,197 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:08,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:10:08,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:08,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 06:10:08,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16975 backedges. 0 proven. 16975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:09,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:09,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-23 06:10:09,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971999658] [2020-12-23 06:10:09,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-23 06:10:09,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:09,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-23 06:10:09,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:10:09,355 INFO L87 Difference]: Start difference. First operand 567 states and 707 transitions. Second operand 74 states. [2020-12-23 06:10:10,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:10,274 INFO L93 Difference]: Finished difference Result 586 states and 730 transitions. [2020-12-23 06:10:10,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-23 06:10:10,274 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 496 [2020-12-23 06:10:10,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:10,277 INFO L225 Difference]: With dead ends: 586 [2020-12-23 06:10:10,277 INFO L226 Difference]: Without dead ends: 582 [2020-12-23 06:10:10,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:10:10,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2020-12-23 06:10:10,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 575. [2020-12-23 06:10:10,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2020-12-23 06:10:10,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 717 transitions. [2020-12-23 06:10:10,283 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 717 transitions. Word has length 496 [2020-12-23 06:10:10,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:10,283 INFO L481 AbstractCegarLoop]: Abstraction has 575 states and 717 transitions. [2020-12-23 06:10:10,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-23 06:10:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 717 transitions. [2020-12-23 06:10:10,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-12-23 06:10:10,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:10,286 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:10,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-12-23 06:10:10,487 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:10,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:10,487 INFO L82 PathProgramCache]: Analyzing trace with hash -781651498, now seen corresponding path program 71 times [2020-12-23 06:10:10,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:10,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150566883] [2020-12-23 06:10:10,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17466 backedges. 0 proven. 17466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:14,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150566883] [2020-12-23 06:10:14,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323827484] [2020-12-23 06:10:14,496 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:15,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2020-12-23 06:10:15,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:15,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 06:10:15,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17466 backedges. 0 proven. 17466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:15,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:15,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-23 06:10:15,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110941068] [2020-12-23 06:10:15,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 06:10:15,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:15,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 06:10:15,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 06:10:15,935 INFO L87 Difference]: Start difference. First operand 575 states and 717 transitions. Second operand 75 states. [2020-12-23 06:10:16,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:16,744 INFO L93 Difference]: Finished difference Result 594 states and 740 transitions. [2020-12-23 06:10:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 06:10:16,745 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 503 [2020-12-23 06:10:16,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:16,748 INFO L225 Difference]: With dead ends: 594 [2020-12-23 06:10:16,748 INFO L226 Difference]: Without dead ends: 590 [2020-12-23 06:10:16,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 06:10:16,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-12-23 06:10:16,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 583. [2020-12-23 06:10:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2020-12-23 06:10:16,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 727 transitions. [2020-12-23 06:10:16,754 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 727 transitions. Word has length 503 [2020-12-23 06:10:16,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:16,755 INFO L481 AbstractCegarLoop]: Abstraction has 583 states and 727 transitions. [2020-12-23 06:10:16,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 06:10:16,755 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 727 transitions. [2020-12-23 06:10:16,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-12-23 06:10:16,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:16,757 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:16,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:16,958 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:16,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:16,959 INFO L82 PathProgramCache]: Analyzing trace with hash 724070469, now seen corresponding path program 72 times [2020-12-23 06:10:16,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:16,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170550738] [2020-12-23 06:10:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17964 backedges. 0 proven. 17964 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:21,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170550738] [2020-12-23 06:10:21,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214187365] [2020-12-23 06:10:21,105 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:21,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2020-12-23 06:10:21,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:21,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1625 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 06:10:21,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17964 backedges. 0 proven. 17964 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:22,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:22,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-23 06:10:22,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571565104] [2020-12-23 06:10:22,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 06:10:22,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:22,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 06:10:22,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:10:22,566 INFO L87 Difference]: Start difference. First operand 583 states and 727 transitions. Second operand 76 states. [2020-12-23 06:10:23,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:23,565 INFO L93 Difference]: Finished difference Result 602 states and 750 transitions. [2020-12-23 06:10:23,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 06:10:23,566 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 510 [2020-12-23 06:10:23,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:23,568 INFO L225 Difference]: With dead ends: 602 [2020-12-23 06:10:23,568 INFO L226 Difference]: Without dead ends: 598 [2020-12-23 06:10:23,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:10:23,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-12-23 06:10:23,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 591. [2020-12-23 06:10:23,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-12-23 06:10:23,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 737 transitions. [2020-12-23 06:10:23,574 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 737 transitions. Word has length 510 [2020-12-23 06:10:23,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:23,575 INFO L481 AbstractCegarLoop]: Abstraction has 591 states and 737 transitions. [2020-12-23 06:10:23,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 06:10:23,575 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 737 transitions. [2020-12-23 06:10:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2020-12-23 06:10:23,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:23,577 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:23,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:23,779 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:23,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:23,780 INFO L82 PathProgramCache]: Analyzing trace with hash 188851958, now seen corresponding path program 73 times [2020-12-23 06:10:23,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:23,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301172763] [2020-12-23 06:10:23,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18469 backedges. 0 proven. 18469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:28,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301172763] [2020-12-23 06:10:28,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602974448] [2020-12-23 06:10:28,010 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:28,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 06:10:28,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18469 backedges. 0 proven. 18469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:29,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:29,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-12-23 06:10:29,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802506507] [2020-12-23 06:10:29,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-23 06:10:29,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:29,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-23 06:10:29,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 06:10:29,195 INFO L87 Difference]: Start difference. First operand 591 states and 737 transitions. Second operand 77 states. [2020-12-23 06:10:30,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:30,240 INFO L93 Difference]: Finished difference Result 610 states and 760 transitions. [2020-12-23 06:10:30,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-23 06:10:30,241 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 517 [2020-12-23 06:10:30,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:30,243 INFO L225 Difference]: With dead ends: 610 [2020-12-23 06:10:30,243 INFO L226 Difference]: Without dead ends: 606 [2020-12-23 06:10:30,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 06:10:30,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-12-23 06:10:30,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 599. [2020-12-23 06:10:30,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-12-23 06:10:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 747 transitions. [2020-12-23 06:10:30,250 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 747 transitions. Word has length 517 [2020-12-23 06:10:30,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:30,250 INFO L481 AbstractCegarLoop]: Abstraction has 599 states and 747 transitions. [2020-12-23 06:10:30,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-23 06:10:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 747 transitions. [2020-12-23 06:10:30,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2020-12-23 06:10:30,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:30,253 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:30,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:30,453 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:30,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:30,454 INFO L82 PathProgramCache]: Analyzing trace with hash -550521051, now seen corresponding path program 74 times [2020-12-23 06:10:30,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:30,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259958371] [2020-12-23 06:10:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18981 backedges. 0 proven. 18981 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:34,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259958371] [2020-12-23 06:10:34,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318430150] [2020-12-23 06:10:34,834 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:35,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:10:35,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:35,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 1669 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 06:10:35,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18981 backedges. 0 proven. 18981 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:36,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:36,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-23 06:10:36,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426287770] [2020-12-23 06:10:36,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-23 06:10:36,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:36,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-23 06:10:36,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 06:10:36,035 INFO L87 Difference]: Start difference. First operand 599 states and 747 transitions. Second operand 78 states. [2020-12-23 06:10:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:36,901 INFO L93 Difference]: Finished difference Result 618 states and 770 transitions. [2020-12-23 06:10:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 06:10:36,902 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 524 [2020-12-23 06:10:36,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:36,904 INFO L225 Difference]: With dead ends: 618 [2020-12-23 06:10:36,904 INFO L226 Difference]: Without dead ends: 614 [2020-12-23 06:10:36,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 06:10:36,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2020-12-23 06:10:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 607. [2020-12-23 06:10:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2020-12-23 06:10:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 757 transitions. [2020-12-23 06:10:36,911 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 757 transitions. Word has length 524 [2020-12-23 06:10:36,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:36,911 INFO L481 AbstractCegarLoop]: Abstraction has 607 states and 757 transitions. [2020-12-23 06:10:36,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-23 06:10:36,911 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 757 transitions. [2020-12-23 06:10:36,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2020-12-23 06:10:36,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:36,913 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:37,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-12-23 06:10:37,114 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:37,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:37,115 INFO L82 PathProgramCache]: Analyzing trace with hash -2002328554, now seen corresponding path program 75 times [2020-12-23 06:10:37,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:37,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106358390] [2020-12-23 06:10:37,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 19500 backedges. 0 proven. 19500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:41,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106358390] [2020-12-23 06:10:41,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922290981] [2020-12-23 06:10:41,633 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:42,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2020-12-23 06:10:42,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:42,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 06:10:42,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 19500 backedges. 0 proven. 19500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:43,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:43,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-23 06:10:43,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256150421] [2020-12-23 06:10:43,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-23 06:10:43,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:43,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-23 06:10:43,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 06:10:43,170 INFO L87 Difference]: Start difference. First operand 607 states and 757 transitions. Second operand 79 states. [2020-12-23 06:10:44,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:44,327 INFO L93 Difference]: Finished difference Result 626 states and 780 transitions. [2020-12-23 06:10:44,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-23 06:10:44,327 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 531 [2020-12-23 06:10:44,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:44,330 INFO L225 Difference]: With dead ends: 626 [2020-12-23 06:10:44,330 INFO L226 Difference]: Without dead ends: 622 [2020-12-23 06:10:44,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 06:10:44,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2020-12-23 06:10:44,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 615. [2020-12-23 06:10:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2020-12-23 06:10:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 767 transitions. [2020-12-23 06:10:44,337 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 767 transitions. Word has length 531 [2020-12-23 06:10:44,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:44,337 INFO L481 AbstractCegarLoop]: Abstraction has 615 states and 767 transitions. [2020-12-23 06:10:44,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-23 06:10:44,337 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 767 transitions. [2020-12-23 06:10:44,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2020-12-23 06:10:44,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:44,339 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:44,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:44,540 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:44,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:44,541 INFO L82 PathProgramCache]: Analyzing trace with hash 436303365, now seen corresponding path program 76 times [2020-12-23 06:10:44,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:44,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228455077] [2020-12-23 06:10:44,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20026 backedges. 0 proven. 20026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:49,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228455077] [2020-12-23 06:10:49,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319792979] [2020-12-23 06:10:49,342 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:49,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:10:49,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:49,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1713 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-23 06:10:49,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 20026 backedges. 0 proven. 20026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:50,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:50,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2020-12-23 06:10:50,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324523457] [2020-12-23 06:10:50,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-23 06:10:50,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:50,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-23 06:10:50,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:10:50,539 INFO L87 Difference]: Start difference. First operand 615 states and 767 transitions. Second operand 80 states. [2020-12-23 06:10:51,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:51,830 INFO L93 Difference]: Finished difference Result 634 states and 790 transitions. [2020-12-23 06:10:51,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-23 06:10:51,831 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 538 [2020-12-23 06:10:51,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:51,833 INFO L225 Difference]: With dead ends: 634 [2020-12-23 06:10:51,833 INFO L226 Difference]: Without dead ends: 630 [2020-12-23 06:10:51,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:10:51,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2020-12-23 06:10:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 623. [2020-12-23 06:10:51,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2020-12-23 06:10:51,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 777 transitions. [2020-12-23 06:10:51,841 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 777 transitions. Word has length 538 [2020-12-23 06:10:51,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:51,841 INFO L481 AbstractCegarLoop]: Abstraction has 623 states and 777 transitions. [2020-12-23 06:10:51,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-23 06:10:51,841 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 777 transitions. [2020-12-23 06:10:51,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2020-12-23 06:10:51,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:51,844 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:52,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:52,050 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:52,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:52,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1257592522, now seen corresponding path program 77 times [2020-12-23 06:10:52,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:52,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389399288] [2020-12-23 06:10:52,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 20559 backedges. 0 proven. 20559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:56,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389399288] [2020-12-23 06:10:56,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957205386] [2020-12-23 06:10:56,837 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:57,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2020-12-23 06:10:57,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:57,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 1735 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 06:10:57,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20559 backedges. 0 proven. 20559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:58,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:58,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-23 06:10:58,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934339144] [2020-12-23 06:10:58,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-23 06:10:58,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:58,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-23 06:10:58,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 06:10:58,438 INFO L87 Difference]: Start difference. First operand 623 states and 777 transitions. Second operand 81 states. [2020-12-23 06:10:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:59,653 INFO L93 Difference]: Finished difference Result 642 states and 800 transitions. [2020-12-23 06:10:59,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-23 06:10:59,654 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 545 [2020-12-23 06:10:59,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:59,656 INFO L225 Difference]: With dead ends: 642 [2020-12-23 06:10:59,656 INFO L226 Difference]: Without dead ends: 638 [2020-12-23 06:10:59,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 06:10:59,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-12-23 06:10:59,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 631. [2020-12-23 06:10:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2020-12-23 06:10:59,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 787 transitions. [2020-12-23 06:10:59,663 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 787 transitions. Word has length 545 [2020-12-23 06:10:59,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:59,664 INFO L481 AbstractCegarLoop]: Abstraction has 631 states and 787 transitions. [2020-12-23 06:10:59,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-23 06:10:59,664 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 787 transitions. [2020-12-23 06:10:59,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2020-12-23 06:10:59,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:59,666 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:59,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-23 06:10:59,867 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:59,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:59,868 INFO L82 PathProgramCache]: Analyzing trace with hash 199994597, now seen corresponding path program 78 times [2020-12-23 06:10:59,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:59,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252365876] [2020-12-23 06:10:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 0 proven. 21099 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:04,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252365876] [2020-12-23 06:11:04,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639833419] [2020-12-23 06:11:04,823 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:05,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2020-12-23 06:11:05,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:11:05,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 1757 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-23 06:11:05,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:11:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 0 proven. 21099 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:06,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:11:06,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2020-12-23 06:11:06,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343322290] [2020-12-23 06:11:06,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-23 06:11:06,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:06,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-23 06:11:06,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 06:11:06,513 INFO L87 Difference]: Start difference. First operand 631 states and 787 transitions. Second operand 82 states. [2020-12-23 06:11:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:07,744 INFO L93 Difference]: Finished difference Result 650 states and 810 transitions. [2020-12-23 06:11:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-23 06:11:07,745 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 552 [2020-12-23 06:11:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:07,748 INFO L225 Difference]: With dead ends: 650 [2020-12-23 06:11:07,748 INFO L226 Difference]: Without dead ends: 646 [2020-12-23 06:11:07,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 06:11:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2020-12-23 06:11:07,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 639. [2020-12-23 06:11:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2020-12-23 06:11:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 797 transitions. [2020-12-23 06:11:07,755 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 797 transitions. Word has length 552 [2020-12-23 06:11:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:07,755 INFO L481 AbstractCegarLoop]: Abstraction has 639 states and 797 transitions. [2020-12-23 06:11:07,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-23 06:11:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 797 transitions. [2020-12-23 06:11:07,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2020-12-23 06:11:07,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:07,758 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:07,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-12-23 06:11:07,959 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:07,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:07,959 INFO L82 PathProgramCache]: Analyzing trace with hash 207550038, now seen corresponding path program 79 times [2020-12-23 06:11:07,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:07,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291845732] [2020-12-23 06:11:07,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 21646 backedges. 0 proven. 21646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:13,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291845732] [2020-12-23 06:11:13,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241210252] [2020-12-23 06:11:13,029 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:13,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 06:11:13,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:11:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 21646 backedges. 0 proven. 21646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:14,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:11:14,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2020-12-23 06:11:14,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369391747] [2020-12-23 06:11:14,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-23 06:11:14,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:14,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-23 06:11:14,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 06:11:14,289 INFO L87 Difference]: Start difference. First operand 639 states and 797 transitions. Second operand 83 states. [2020-12-23 06:11:15,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:15,243 INFO L93 Difference]: Finished difference Result 658 states and 820 transitions. [2020-12-23 06:11:15,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-23 06:11:15,244 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 559 [2020-12-23 06:11:15,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:15,247 INFO L225 Difference]: With dead ends: 658 [2020-12-23 06:11:15,247 INFO L226 Difference]: Without dead ends: 654 [2020-12-23 06:11:15,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 06:11:15,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2020-12-23 06:11:15,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 647. [2020-12-23 06:11:15,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2020-12-23 06:11:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 807 transitions. [2020-12-23 06:11:15,257 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 807 transitions. Word has length 559 [2020-12-23 06:11:15,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:15,257 INFO L481 AbstractCegarLoop]: Abstraction has 647 states and 807 transitions. [2020-12-23 06:11:15,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-23 06:11:15,257 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 807 transitions. [2020-12-23 06:11:15,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2020-12-23 06:11:15,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:15,260 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:15,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:15,461 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:15,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:15,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1153194949, now seen corresponding path program 80 times [2020-12-23 06:11:15,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:15,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086803702] [2020-12-23 06:11:15,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat