/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops-crafted-1/loopv2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:59:42,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:59:42,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:59:42,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:59:42,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:59:42,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:59:42,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:59:42,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:59:42,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:59:42,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:59:42,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:59:42,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:59:42,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:59:42,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:59:42,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:59:42,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:59:42,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:59:42,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:59:42,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:59:42,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:59:42,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:59:42,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:59:42,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:59:42,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:59:42,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:59:42,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:59:42,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:59:42,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:59:42,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:59:42,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:59:42,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:59:42,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:59:42,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:59:42,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:59:42,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:59:42,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:59:42,967 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:59:42,995 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:59:42,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:59:42,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:59:42,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:59:42,998 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:59:42,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:59:42,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:59:42,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:59:42,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:59:43,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:59:43,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:59:43,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:59:43,001 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:59:43,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:59:43,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:59:43,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:59:43,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:59:43,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:59:43,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:59:43,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:59:43,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:59:43,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:59:43,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:59:43,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:59:43,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:59:43,005 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:59:43,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:59:43,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:59:43,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:59:43,458 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:59:43,458 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:59:43,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/loopv2.c [2021-01-06 16:59:43,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c9f1eabf0/a23f5d386d5340279915ef6b676b48b8/FLAG864404a9f [2021-01-06 16:59:44,276 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:59:44,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/loopv2.c [2021-01-06 16:59:44,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c9f1eabf0/a23f5d386d5340279915ef6b676b48b8/FLAG864404a9f [2021-01-06 16:59:44,610 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c9f1eabf0/a23f5d386d5340279915ef6b676b48b8 [2021-01-06 16:59:44,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:59:44,616 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:59:44,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:59:44,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:59:44,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:59:44,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:59:44" (1/1) ... [2021-01-06 16:59:44,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672880c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:44, skipping insertion in model container [2021-01-06 16:59:44,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:59:44" (1/1) ... [2021-01-06 16:59:44,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:59:44,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:59:44,806 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/loopv2.c[454,467] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2021-01-06 16:59:44,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:59:44,832 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:59:44,847 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/loopv2.c[454,467] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2021-01-06 16:59:44,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:59:44,868 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:59:44,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:44 WrapperNode [2021-01-06 16:59:44,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:59:44,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:59:44,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:59:44,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:59:44,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:44" (1/1) ... [2021-01-06 16:59:44,887 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:44" (1/1) ... [2021-01-06 16:59:44,907 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:59:44,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:59:44,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:59:44,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:59:44,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:44" (1/1) ... [2021-01-06 16:59:44,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:44" (1/1) ... [2021-01-06 16:59:44,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:44" (1/1) ... [2021-01-06 16:59:44,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:44" (1/1) ... [2021-01-06 16:59:44,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:44" (1/1) ... [2021-01-06 16:59:44,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:44" (1/1) ... [2021-01-06 16:59:44,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:44" (1/1) ... [2021-01-06 16:59:44,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:59:44,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:59:44,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:59:44,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:59:44,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:59:45,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:59:45,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:59:45,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:59:45,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:59:45,277 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:59:45,277 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 16:59:45,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:59:45 BoogieIcfgContainer [2021-01-06 16:59:45,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:59:45,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:59:45,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:59:45,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:59:45,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:59:44" (1/3) ... [2021-01-06 16:59:45,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30733b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:59:45, skipping insertion in model container [2021-01-06 16:59:45,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:44" (2/3) ... [2021-01-06 16:59:45,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30733b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:59:45, skipping insertion in model container [2021-01-06 16:59:45,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:59:45" (3/3) ... [2021-01-06 16:59:45,289 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv2.c [2021-01-06 16:59:45,309 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:59:45,332 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:59:45,385 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:59:45,449 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:59:45,450 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:59:45,450 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:59:45,450 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:59:45,450 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:59:45,450 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:59:45,451 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:59:45,451 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:59:45,493 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2021-01-06 16:59:45,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:59:45,502 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:45,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:45,504 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:45,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1446330702, now seen corresponding path program 1 times [2021-01-06 16:59:45,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:45,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874122664] [2021-01-06 16:59:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:45,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874122664] [2021-01-06 16:59:45,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:59:45,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:59:45,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354749185] [2021-01-06 16:59:45,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:59:45,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:45,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:59:45,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:59:45,806 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2021-01-06 16:59:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:45,826 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2021-01-06 16:59:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:59:45,829 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 16:59:45,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:45,854 INFO L225 Difference]: With dead ends: 24 [2021-01-06 16:59:45,854 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:59:45,862 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 [2021-01-06 16:59:45,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:59:45,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-01-06 16:59:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 16:59:45,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-01-06 16:59:45,906 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2021-01-06 16:59:45,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:45,906 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-01-06 16:59:45,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:59:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-01-06 16:59:45,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:59:45,907 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:45,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:45,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:59:45,909 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:45,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:45,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1331814098, now seen corresponding path program 1 times [2021-01-06 16:59:45,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:45,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6255003] [2021-01-06 16:59:45,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:46,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6255003] [2021-01-06 16:59:46,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:59:46,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:59:46,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001331176] [2021-01-06 16:59:46,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:59:46,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:46,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:59:46,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:59:46,031 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2021-01-06 16:59:46,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:46,056 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-01-06 16:59:46,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:59:46,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 16:59:46,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:46,058 INFO L225 Difference]: With dead ends: 17 [2021-01-06 16:59:46,059 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 16:59:46,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:59:46,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 16:59:46,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 16:59:46,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:59:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-01-06 16:59:46,065 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2021-01-06 16:59:46,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:46,065 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-01-06 16:59:46,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:59:46,065 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-01-06 16:59:46,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:59:46,066 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:46,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:46,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:59:46,067 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:46,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:46,068 INFO L82 PathProgramCache]: Analyzing trace with hash -66849766, now seen corresponding path program 1 times [2021-01-06 16:59:46,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:46,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899153540] [2021-01-06 16:59:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:46,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899153540] [2021-01-06 16:59:46,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429809149] [2021-01-06 16:59:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:46,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:59:46,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:46,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:46,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:59:46,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492348122] [2021-01-06 16:59:46,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:59:46,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:46,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:59:46,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:59:46,419 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2021-01-06 16:59:46,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:46,455 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-01-06 16:59:46,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:59:46,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 16:59:46,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:46,456 INFO L225 Difference]: With dead ends: 25 [2021-01-06 16:59:46,457 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 16:59:46,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:59:46,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 16:59:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2021-01-06 16:59:46,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:59:46,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-01-06 16:59:46,462 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 10 [2021-01-06 16:59:46,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:46,462 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-01-06 16:59:46,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:59:46,463 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-01-06 16:59:46,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:59:46,463 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:46,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:46,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:59:46,678 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:46,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:46,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1661770533, now seen corresponding path program 1 times [2021-01-06 16:59:46,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:46,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061450287] [2021-01-06 16:59:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:46,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061450287] [2021-01-06 16:59:46,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373771006] [2021-01-06 16:59:46,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:46,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:59:46,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:46,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:46,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:59:46,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387417494] [2021-01-06 16:59:46,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:59:46,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:46,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:59:46,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:59:46,929 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 5 states. [2021-01-06 16:59:46,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:46,967 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-01-06 16:59:46,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:59:46,968 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 16:59:46,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:46,970 INFO L225 Difference]: With dead ends: 21 [2021-01-06 16:59:46,970 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 16:59:46,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:59:46,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 16:59:46,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-01-06 16:59:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 16:59:46,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-01-06 16:59:46,977 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2021-01-06 16:59:46,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:46,977 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-01-06 16:59:46,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:59:46,977 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-01-06 16:59:46,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:59:46,978 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:46,978 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:47,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:47,192 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:47,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:47,193 INFO L82 PathProgramCache]: Analyzing trace with hash -475756590, now seen corresponding path program 2 times [2021-01-06 16:59:47,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:47,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922615105] [2021-01-06 16:59:47,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:47,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922615105] [2021-01-06 16:59:47,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196245329] [2021-01-06 16:59:47,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:47,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:59:47,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:47,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:59:47,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:47,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:47,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:59:47,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309164200] [2021-01-06 16:59:47,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:59:47,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:47,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:59:47,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:59:47,414 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 6 states. [2021-01-06 16:59:47,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:47,476 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-01-06 16:59:47,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:59:47,477 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-01-06 16:59:47,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:47,478 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:59:47,478 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 16:59:47,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:59:47,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 16:59:47,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 17. [2021-01-06 16:59:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:59:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-01-06 16:59:47,485 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2021-01-06 16:59:47,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:47,485 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-01-06 16:59:47,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:59:47,486 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-01-06 16:59:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:59:47,519 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:47,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:47,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:47,731 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:47,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2070677357, now seen corresponding path program 1 times [2021-01-06 16:59:47,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:47,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807678334] [2021-01-06 16:59:47,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:47,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807678334] [2021-01-06 16:59:47,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669698564] [2021-01-06 16:59:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:47,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:59:47,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:47,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:47,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:59:47,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652876401] [2021-01-06 16:59:47,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:59:47,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:47,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:59:47,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:59:47,914 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 6 states. [2021-01-06 16:59:47,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:47,951 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-01-06 16:59:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:59:47,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-01-06 16:59:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:47,952 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:59:47,952 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:59:47,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:59:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:59:47,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2021-01-06 16:59:47,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:59:47,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-01-06 16:59:47,959 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2021-01-06 16:59:47,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:47,959 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-01-06 16:59:47,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:59:47,959 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-01-06 16:59:47,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:59:47,960 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:47,960 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:48,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:48,176 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:48,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:48,178 INFO L82 PathProgramCache]: Analyzing trace with hash 26386418, now seen corresponding path program 2 times [2021-01-06 16:59:48,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:48,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995081095] [2021-01-06 16:59:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:48,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995081095] [2021-01-06 16:59:48,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905569424] [2021-01-06 16:59:48,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:48,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:59:48,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:48,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:59:48,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:48,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:48,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2021-01-06 16:59:48,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545996935] [2021-01-06 16:59:48,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:59:48,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:48,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:59:48,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:59:48,407 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 10 states. [2021-01-06 16:59:48,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:48,534 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-01-06 16:59:48,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:59:48,535 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2021-01-06 16:59:48,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:48,535 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:59:48,536 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:59:48,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:59:48,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:59:48,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2021-01-06 16:59:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:59:48,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-01-06 16:59:48,543 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2021-01-06 16:59:48,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:48,543 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-01-06 16:59:48,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:59:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-01-06 16:59:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:59:48,544 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:48,544 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:48,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:59:48,760 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:48,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:48,761 INFO L82 PathProgramCache]: Analyzing trace with hash -266966246, now seen corresponding path program 3 times [2021-01-06 16:59:48,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:48,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044763659] [2021-01-06 16:59:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:48,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044763659] [2021-01-06 16:59:48,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696072755] [2021-01-06 16:59:48,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:48,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 16:59:48,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:48,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:59:48,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:49,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:49,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:59:49,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712100887] [2021-01-06 16:59:49,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:59:49,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:49,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:59:49,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:59:49,006 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 7 states. [2021-01-06 16:59:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:49,085 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-01-06 16:59:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:59:49,086 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 16:59:49,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:49,087 INFO L225 Difference]: With dead ends: 44 [2021-01-06 16:59:49,087 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 16:59:49,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:59:49,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 16:59:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 20. [2021-01-06 16:59:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 16:59:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-01-06 16:59:49,094 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 12 [2021-01-06 16:59:49,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:49,094 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-01-06 16:59:49,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:59:49,095 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-01-06 16:59:49,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:59:49,095 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:49,095 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:49,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:49,309 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:49,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:49,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1861887013, now seen corresponding path program 2 times [2021-01-06 16:59:49,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:49,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224698039] [2021-01-06 16:59:49,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:49,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224698039] [2021-01-06 16:59:49,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306826312] [2021-01-06 16:59:49,411 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:49,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:59:49,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:49,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:59:49,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:49,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:49,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:59:49,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605977216] [2021-01-06 16:59:49,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:59:49,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:49,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:59:49,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:59:49,515 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 7 states. [2021-01-06 16:59:49,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:49,611 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-01-06 16:59:49,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:59:49,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 16:59:49,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:49,613 INFO L225 Difference]: With dead ends: 33 [2021-01-06 16:59:49,613 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:59:49,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:59:49,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:59:49,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 16:59:49,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:59:49,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-01-06 16:59:49,617 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-01-06 16:59:49,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:49,617 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-01-06 16:59:49,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:59:49,617 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-01-06 16:59:49,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:59:49,618 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:49,618 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:49,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:49,834 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:49,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:49,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1910567122, now seen corresponding path program 4 times [2021-01-06 16:59:49,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:49,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999627121] [2021-01-06 16:59:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:49,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999627121] [2021-01-06 16:59:49,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709925211] [2021-01-06 16:59:49,941 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:49,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:59:49,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:49,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:59:49,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:50,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:50,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 16:59:50,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130527851] [2021-01-06 16:59:50,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:59:50,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:50,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:59:50,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:59:50,050 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2021-01-06 16:59:50,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:50,094 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-01-06 16:59:50,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:59:50,095 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2021-01-06 16:59:50,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:50,095 INFO L225 Difference]: With dead ends: 21 [2021-01-06 16:59:50,095 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 16:59:50,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:59:50,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 16:59:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 16:59:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 16:59:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-01-06 16:59:50,104 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-01-06 16:59:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:50,104 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-01-06 16:59:50,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:59:50,104 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-01-06 16:59:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:59:50,105 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:50,105 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:50,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:59:50,321 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:50,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:50,322 INFO L82 PathProgramCache]: Analyzing trace with hash 694624794, now seen corresponding path program 5 times [2021-01-06 16:59:50,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:50,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896992017] [2021-01-06 16:59:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:50,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896992017] [2021-01-06 16:59:50,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158017159] [2021-01-06 16:59:50,475 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:50,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 16:59:50,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:50,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:59:50,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:50,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:50,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:59:50,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835294089] [2021-01-06 16:59:50,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:59:50,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:50,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:59:50,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:59:50,575 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2021-01-06 16:59:50,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:50,685 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-01-06 16:59:50,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:59:50,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2021-01-06 16:59:50,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:50,687 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:59:50,687 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 16:59:50,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:59:50,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 16:59:50,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 16:59:50,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 16:59:50,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-01-06 16:59:50,691 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-01-06 16:59:50,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:50,691 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-01-06 16:59:50,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:59:50,691 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-01-06 16:59:50,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:59:50,692 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:50,692 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:50,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:50,907 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:50,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1655118290, now seen corresponding path program 6 times [2021-01-06 16:59:50,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:50,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393378975] [2021-01-06 16:59:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:51,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393378975] [2021-01-06 16:59:51,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62501501] [2021-01-06 16:59:51,091 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:51,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 16:59:51,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:51,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:59:51,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:51,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:51,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-01-06 16:59:51,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118255411] [2021-01-06 16:59:51,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:59:51,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:51,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:59:51,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:59:51,326 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2021-01-06 16:59:51,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:51,422 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-01-06 16:59:51,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:59:51,422 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2021-01-06 16:59:51,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:51,423 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:59:51,423 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 16:59:51,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:59:51,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 16:59:51,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 16:59:51,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 16:59:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-01-06 16:59:51,428 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2021-01-06 16:59:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:51,428 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-01-06 16:59:51,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:59:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-01-06 16:59:51,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 16:59:51,429 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:51,429 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:51,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:51,645 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:51,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:51,647 INFO L82 PathProgramCache]: Analyzing trace with hash 981926610, now seen corresponding path program 7 times [2021-01-06 16:59:51,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:51,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022815091] [2021-01-06 16:59:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:51,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022815091] [2021-01-06 16:59:51,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327458846] [2021-01-06 16:59:51,800 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:51,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:59:51,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:51,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:51,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:59:51,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715567738] [2021-01-06 16:59:51,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:59:51,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:51,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:59:51,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:59:51,905 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 12 states. [2021-01-06 16:59:51,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:51,981 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-01-06 16:59:51,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:59:51,983 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2021-01-06 16:59:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:51,983 INFO L225 Difference]: With dead ends: 25 [2021-01-06 16:59:51,984 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 16:59:51,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:59:51,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 16:59:51,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 16:59:51,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:59:51,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-01-06 16:59:52,000 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2021-01-06 16:59:52,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:52,002 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-01-06 16:59:52,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:59:52,002 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-01-06 16:59:52,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:59:52,003 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:52,003 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:52,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:59:52,218 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:52,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:52,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1971539994, now seen corresponding path program 8 times [2021-01-06 16:59:52,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:52,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380461309] [2021-01-06 16:59:52,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:52,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380461309] [2021-01-06 16:59:52,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750962352] [2021-01-06 16:59:52,412 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:52,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:59:52,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:52,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:59:52,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:52,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:52,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:59:52,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476514391] [2021-01-06 16:59:52,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:59:52,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:52,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:59:52,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:59:52,526 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 13 states. [2021-01-06 16:59:52,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:52,634 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-01-06 16:59:52,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:59:52,634 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2021-01-06 16:59:52,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:52,635 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:59:52,635 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 16:59:52,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:59:52,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 16:59:52,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 16:59:52,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 16:59:52,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-01-06 16:59:52,640 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2021-01-06 16:59:52,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:52,640 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-01-06 16:59:52,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:59:52,640 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-01-06 16:59:52,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:59:52,641 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:52,641 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:52,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:59:52,856 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:52,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:52,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1710183470, now seen corresponding path program 9 times [2021-01-06 16:59:52,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:52,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844796825] [2021-01-06 16:59:52,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:53,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844796825] [2021-01-06 16:59:53,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130126587] [2021-01-06 16:59:53,065 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:53,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:59:53,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:53,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:59:53,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:53,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:53,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-01-06 16:59:53,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002267389] [2021-01-06 16:59:53,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:59:53,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:53,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:59:53,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:59:53,388 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 24 states. [2021-01-06 16:59:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:53,789 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-01-06 16:59:53,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:59:53,790 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 19 [2021-01-06 16:59:53,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:53,791 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:59:53,792 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 16:59:53,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:59:53,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 16:59:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-01-06 16:59:53,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 16:59:53,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-01-06 16:59:53,804 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2021-01-06 16:59:53,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:53,804 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-01-06 16:59:53,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:59:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-01-06 16:59:53,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:59:53,807 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:53,808 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:54,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:59:54,024 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:54,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1037309138, now seen corresponding path program 10 times [2021-01-06 16:59:54,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:54,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144257869] [2021-01-06 16:59:54,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:54,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144257869] [2021-01-06 16:59:54,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509027179] [2021-01-06 16:59:54,259 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:54,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:59:54,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:54,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:59:54,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:54,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:54,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:59:54,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495542361] [2021-01-06 16:59:54,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:59:54,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:54,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:59:54,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:59:54,377 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 16 states. [2021-01-06 16:59:54,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:54,758 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-01-06 16:59:54,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:59:54,759 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2021-01-06 16:59:54,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:54,760 INFO L225 Difference]: With dead ends: 29 [2021-01-06 16:59:54,760 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 16:59:54,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:59:54,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 16:59:54,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 16:59:54,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 16:59:54,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-01-06 16:59:54,776 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2021-01-06 16:59:54,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:54,777 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-01-06 16:59:54,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:59:54,777 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-01-06 16:59:54,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:59:54,782 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:54,782 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:54,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:54,996 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:54,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:54,997 INFO L82 PathProgramCache]: Analyzing trace with hash -606568934, now seen corresponding path program 11 times [2021-01-06 16:59:54,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:54,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7778072] [2021-01-06 16:59:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:55,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7778072] [2021-01-06 16:59:55,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445324054] [2021-01-06 16:59:55,251 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:55,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 16:59:55,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:55,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:59:55,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:55,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:55,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:59:55,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870442732] [2021-01-06 16:59:55,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:59:55,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:55,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:59:55,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:59:55,380 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 17 states. [2021-01-06 16:59:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:55,574 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-01-06 16:59:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:59:55,574 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2021-01-06 16:59:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:55,575 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:59:55,575 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 16:59:55,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:59:55,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 16:59:55,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 16:59:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 16:59:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-01-06 16:59:55,581 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2021-01-06 16:59:55,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:55,582 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-01-06 16:59:55,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:59:55,582 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-01-06 16:59:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:59:55,583 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:55,583 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:55,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:59:55,798 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:55,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:55,799 INFO L82 PathProgramCache]: Analyzing trace with hash -27181614, now seen corresponding path program 12 times [2021-01-06 16:59:55,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:55,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824903659] [2021-01-06 16:59:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:56,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824903659] [2021-01-06 16:59:56,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562759822] [2021-01-06 16:59:56,129 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:56,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 16:59:56,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:56,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:59:56,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:56,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:56,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-01-06 16:59:56,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388310337] [2021-01-06 16:59:56,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:59:56,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:56,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:59:56,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:59:56,629 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 32 states. [2021-01-06 16:59:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:57,331 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-01-06 16:59:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:59:57,332 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 23 [2021-01-06 16:59:57,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:57,332 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:59:57,332 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:59:57,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=1924, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:59:57,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:59:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 16:59:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 16:59:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-01-06 16:59:57,338 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2021-01-06 16:59:57,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:57,338 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-01-06 16:59:57,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:59:57,338 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-01-06 16:59:57,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 16:59:57,339 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:57,339 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:57,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:59:57,554 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:57,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:57,556 INFO L82 PathProgramCache]: Analyzing trace with hash -800577838, now seen corresponding path program 13 times [2021-01-06 16:59:57,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:57,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198854759] [2021-01-06 16:59:57,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:57,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198854759] [2021-01-06 16:59:57,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699169555] [2021-01-06 16:59:57,927 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:57,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:59:57,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:58,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:58,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:59:58,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333353643] [2021-01-06 16:59:58,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:59:58,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:58,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:59:58,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:59:58,068 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 20 states. [2021-01-06 16:59:58,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:58,331 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-01-06 16:59:58,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:59:58,333 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2021-01-06 16:59:58,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:58,333 INFO L225 Difference]: With dead ends: 33 [2021-01-06 16:59:58,333 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:59:58,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:59:58,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:59:58,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 16:59:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 16:59:58,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-01-06 16:59:58,339 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2021-01-06 16:59:58,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:58,339 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-01-06 16:59:58,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:59:58,339 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-01-06 16:59:58,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:59:58,340 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:58,340 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:58,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:58,554 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:58,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:58,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1746490342, now seen corresponding path program 14 times [2021-01-06 16:59:58,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:58,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253516479] [2021-01-06 16:59:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:58,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253516479] [2021-01-06 16:59:58,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305401336] [2021-01-06 16:59:58,911 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:58,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:59:58,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:58,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:59:58,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:59,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:59,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 16:59:59,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164653203] [2021-01-06 16:59:59,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:59:59,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:59,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:59:59,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:59:59,054 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 21 states. [2021-01-06 16:59:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:59,331 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-01-06 16:59:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:59:59,332 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2021-01-06 16:59:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:59,333 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:59:59,333 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 16:59:59,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:59:59,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 16:59:59,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 16:59:59,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 16:59:59,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-01-06 16:59:59,338 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2021-01-06 16:59:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:59,339 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-01-06 16:59:59,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:59:59,339 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-01-06 16:59:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:59:59,339 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:59,339 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:59,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:59,543 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:59,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:59,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1005006894, now seen corresponding path program 15 times [2021-01-06 16:59:59,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:59,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063664409] [2021-01-06 16:59:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:59,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063664409] [2021-01-06 16:59:59,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322320059] [2021-01-06 16:59:59,932 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:59,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:59:59,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:59,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 17:00:00,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:00,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:00,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-01-06 17:00:00,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863228858] [2021-01-06 17:00:00,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 17:00:00,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:00,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 17:00:00,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1463, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:00:00,812 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 40 states. [2021-01-06 17:00:01,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:01,692 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-01-06 17:00:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 17:00:01,692 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 27 [2021-01-06 17:00:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:01,693 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:00:01,693 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:00:01,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=186, Invalid=3120, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 17:00:01,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:00:01,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 17:00:01,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:00:01,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-01-06 17:00:01,718 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2021-01-06 17:00:01,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:01,719 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-01-06 17:00:01,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 17:00:01,719 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-01-06 17:00:01,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 17:00:01,720 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:01,720 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:01,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:01,921 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:01,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:01,921 INFO L82 PathProgramCache]: Analyzing trace with hash 107165906, now seen corresponding path program 16 times [2021-01-06 17:00:01,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:01,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744539631] [2021-01-06 17:00:01,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:02,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744539631] [2021-01-06 17:00:02,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31763263] [2021-01-06 17:00:02,412 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:02,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:02,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:02,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 17:00:02,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:02,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:02,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 17:00:02,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685239444] [2021-01-06 17:00:02,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 17:00:02,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:02,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 17:00:02,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:00:02,569 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 24 states. [2021-01-06 17:00:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:03,536 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-01-06 17:00:03,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 17:00:03,540 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2021-01-06 17:00:03,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:03,540 INFO L225 Difference]: With dead ends: 37 [2021-01-06 17:00:03,540 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 17:00:03,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 17:00:03,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 17:00:03,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-01-06 17:00:03,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:00:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-01-06 17:00:03,548 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2021-01-06 17:00:03,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:03,548 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-01-06 17:00:03,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 17:00:03,548 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-01-06 17:00:03,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:00:03,549 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:03,549 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:03,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 17:00:03,756 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:03,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:03,756 INFO L82 PathProgramCache]: Analyzing trace with hash 623761946, now seen corresponding path program 17 times [2021-01-06 17:00:03,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:03,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340792910] [2021-01-06 17:00:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:04,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340792910] [2021-01-06 17:00:04,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922612910] [2021-01-06 17:00:04,253 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:04,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 17:00:04,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:04,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 17:00:04,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:04,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:04,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 17:00:04,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589167984] [2021-01-06 17:00:04,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 17:00:04,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:04,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 17:00:04,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:00:04,393 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 25 states. [2021-01-06 17:00:04,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:04,761 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-01-06 17:00:04,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 17:00:04,762 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 30 [2021-01-06 17:00:04,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:04,763 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:00:04,763 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 17:00:04,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:00:04,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 17:00:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 17:00:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 17:00:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-01-06 17:00:04,767 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2021-01-06 17:00:04,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:04,768 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-01-06 17:00:04,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 17:00:04,768 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-01-06 17:00:04,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 17:00:04,768 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:04,769 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:04,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 17:00:04,983 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:04,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:04,984 INFO L82 PathProgramCache]: Analyzing trace with hash -541629998, now seen corresponding path program 18 times [2021-01-06 17:00:04,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:04,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834969621] [2021-01-06 17:00:04,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:05,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834969621] [2021-01-06 17:00:05,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910064297] [2021-01-06 17:00:05,607 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:05,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-01-06 17:00:05,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:05,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 56 conjunts are in the unsatisfiable core [2021-01-06 17:00:05,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:06,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:06,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28] total 50 [2021-01-06 17:00:06,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556364973] [2021-01-06 17:00:06,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 17:00:06,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:06,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 17:00:06,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2331, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 17:00:06,932 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 50 states. [2021-01-06 17:00:07,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:07,599 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-01-06 17:00:07,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 17:00:07,600 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 31 [2021-01-06 17:00:07,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:07,601 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:00:07,601 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 17:00:07,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=131, Invalid=2521, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 17:00:07,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 17:00:07,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-01-06 17:00:07,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 17:00:07,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-01-06 17:00:07,606 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2021-01-06 17:00:07,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:07,607 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-01-06 17:00:07,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 17:00:07,607 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-01-06 17:00:07,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 17:00:07,607 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:07,607 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:07,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:07,823 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:07,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:07,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1264235822, now seen corresponding path program 19 times [2021-01-06 17:00:07,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:07,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886305115] [2021-01-06 17:00:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:08,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886305115] [2021-01-06 17:00:08,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782434721] [2021-01-06 17:00:08,444 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:08,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 17:00:08,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:08,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:08,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 17:00:08,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832178795] [2021-01-06 17:00:08,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 17:00:08,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:08,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 17:00:08,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:00:08,594 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 28 states. [2021-01-06 17:00:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:09,104 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-01-06 17:00:09,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 17:00:09,105 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2021-01-06 17:00:09,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:09,105 INFO L225 Difference]: With dead ends: 41 [2021-01-06 17:00:09,106 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 17:00:09,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:00:09,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 17:00:09,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-01-06 17:00:09,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:00:09,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-01-06 17:00:09,110 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2021-01-06 17:00:09,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:09,111 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-01-06 17:00:09,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 17:00:09,111 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-01-06 17:00:09,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 17:00:09,111 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:09,111 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:09,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 17:00:09,315 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:09,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:09,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1059981338, now seen corresponding path program 20 times [2021-01-06 17:00:09,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:09,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10207616] [2021-01-06 17:00:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:10,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10207616] [2021-01-06 17:00:10,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405603777] [2021-01-06 17:00:10,004 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:10,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:10,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:10,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 17:00:10,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:10,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:10,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 17:00:10,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297301085] [2021-01-06 17:00:10,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 17:00:10,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:10,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 17:00:10,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:00:10,175 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 29 states. [2021-01-06 17:00:11,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:11,474 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-01-06 17:00:11,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 17:00:11,476 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 34 [2021-01-06 17:00:11,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:11,477 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:00:11,477 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:00:11,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 17:00:11,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:00:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 17:00:11,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 17:00:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-01-06 17:00:11,486 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2021-01-06 17:00:11,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:11,486 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-01-06 17:00:11,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 17:00:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-01-06 17:00:11,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 17:00:11,487 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:11,487 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:11,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:11,702 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:11,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:11,702 INFO L82 PathProgramCache]: Analyzing trace with hash 96269266, now seen corresponding path program 21 times [2021-01-06 17:00:11,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:11,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109409672] [2021-01-06 17:00:11,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:12,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109409672] [2021-01-06 17:00:12,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192121781] [2021-01-06 17:00:12,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:12,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-01-06 17:00:12,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:12,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 17:00:12,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:14,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:14,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 56 [2021-01-06 17:00:14,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975009711] [2021-01-06 17:00:14,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 17:00:14,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:14,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 17:00:14,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2943, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 17:00:14,074 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 56 states. [2021-01-06 17:00:15,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:15,192 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-01-06 17:00:15,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 17:00:15,193 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 35 [2021-01-06 17:00:15,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:15,194 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:00:15,194 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:00:15,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=137, Invalid=2943, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 17:00:15,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:00:15,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 17:00:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:00:15,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-01-06 17:00:15,199 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2021-01-06 17:00:15,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:15,199 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-01-06 17:00:15,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 17:00:15,199 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-01-06 17:00:15,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 17:00:15,200 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:15,200 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:15,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 17:00:15,403 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:15,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:15,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1871600850, now seen corresponding path program 22 times [2021-01-06 17:00:15,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:15,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104374213] [2021-01-06 17:00:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:16,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104374213] [2021-01-06 17:00:16,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968449949] [2021-01-06 17:00:16,164 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:16,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:16,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:16,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 17:00:16,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:16,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:16,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 17:00:16,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012734961] [2021-01-06 17:00:16,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 17:00:16,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:16,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 17:00:16,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:00:16,315 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 32 states. [2021-01-06 17:00:17,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:17,015 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-01-06 17:00:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 17:00:17,016 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 37 [2021-01-06 17:00:17,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:17,017 INFO L225 Difference]: With dead ends: 45 [2021-01-06 17:00:17,017 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 17:00:17,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:00:17,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 17:00:17,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 17:00:17,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 17:00:17,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-01-06 17:00:17,022 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2021-01-06 17:00:17,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:17,022 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-01-06 17:00:17,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 17:00:17,022 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-01-06 17:00:17,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 17:00:17,023 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:17,023 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:17,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 17:00:17,236 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:17,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:17,236 INFO L82 PathProgramCache]: Analyzing trace with hash -513329638, now seen corresponding path program 23 times [2021-01-06 17:00:17,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:17,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757292277] [2021-01-06 17:00:17,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:18,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757292277] [2021-01-06 17:00:18,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695522357] [2021-01-06 17:00:18,104 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:18,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-01-06 17:00:18,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:18,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 17:00:18,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:18,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:18,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 17:00:18,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261526390] [2021-01-06 17:00:18,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 17:00:18,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:18,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 17:00:18,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:00:18,300 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 33 states. [2021-01-06 17:00:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:19,044 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-01-06 17:00:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 17:00:19,044 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 38 [2021-01-06 17:00:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:19,045 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:00:19,045 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:00:19,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:00:19,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:00:19,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-01-06 17:00:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 17:00:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-01-06 17:00:19,051 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2021-01-06 17:00:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:19,051 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-01-06 17:00:19,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 17:00:19,052 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-01-06 17:00:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 17:00:19,052 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:19,052 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:19,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 17:00:19,266 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:19,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:19,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1431730734, now seen corresponding path program 24 times [2021-01-06 17:00:19,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:19,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599383595] [2021-01-06 17:00:19,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:20,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599383595] [2021-01-06 17:00:20,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608680734] [2021-01-06 17:00:20,197 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:20,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-01-06 17:00:20,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:20,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 67 conjunts are in the unsatisfiable core [2021-01-06 17:00:20,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:22,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:22,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 64 [2021-01-06 17:00:22,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157230865] [2021-01-06 17:00:22,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-01-06 17:00:22,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:22,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-01-06 17:00:22,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3875, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 17:00:22,205 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 64 states. [2021-01-06 17:00:23,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:23,550 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-01-06 17:00:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 17:00:23,551 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 39 [2021-01-06 17:00:23,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:23,552 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:00:23,552 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:00:23,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=157, Invalid=3875, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 17:00:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:00:23,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 17:00:23,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 17:00:23,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-01-06 17:00:23,556 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2021-01-06 17:00:23,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:23,557 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-01-06 17:00:23,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2021-01-06 17:00:23,557 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-01-06 17:00:23,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 17:00:23,557 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:23,557 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:23,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:23,760 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:23,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:23,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1952551214, now seen corresponding path program 25 times [2021-01-06 17:00:23,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:23,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553689730] [2021-01-06 17:00:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:24,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553689730] [2021-01-06 17:00:24,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676401107] [2021-01-06 17:00:24,710 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:24,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 17:00:24,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:24,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:24,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 17:00:24,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609251993] [2021-01-06 17:00:24,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 17:00:24,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:24,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 17:00:24,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:00:24,898 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 36 states. [2021-01-06 17:00:25,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:25,771 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-01-06 17:00:25,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 17:00:25,772 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2021-01-06 17:00:25,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:25,773 INFO L225 Difference]: With dead ends: 49 [2021-01-06 17:00:25,773 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 17:00:25,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:00:25,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 17:00:25,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-01-06 17:00:25,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 17:00:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-01-06 17:00:25,779 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2021-01-06 17:00:25,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:25,779 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-01-06 17:00:25,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 17:00:25,779 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-01-06 17:00:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:00:25,780 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:25,780 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:25,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 17:00:25,994 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:25,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:25,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1197040666, now seen corresponding path program 26 times [2021-01-06 17:00:25,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:25,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021536616] [2021-01-06 17:00:25,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:27,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021536616] [2021-01-06 17:00:27,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882790635] [2021-01-06 17:00:27,031 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:27,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:27,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:27,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 17:00:27,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:27,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:27,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 17:00:27,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547068722] [2021-01-06 17:00:27,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 17:00:27,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:27,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 17:00:27,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:00:27,236 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 37 states. [2021-01-06 17:00:28,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:28,173 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-01-06 17:00:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 17:00:28,174 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2021-01-06 17:00:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:28,174 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:00:28,174 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:00:28,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:00:28,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:00:28,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-01-06 17:00:28,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 17:00:28,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-01-06 17:00:28,180 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2021-01-06 17:00:28,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:28,181 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-01-06 17:00:28,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 17:00:28,181 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-01-06 17:00:28,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 17:00:28,181 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:28,181 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:28,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:28,388 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:28,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:28,388 INFO L82 PathProgramCache]: Analyzing trace with hash 50141138, now seen corresponding path program 27 times [2021-01-06 17:00:28,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:28,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755691901] [2021-01-06 17:00:28,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:29,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755691901] [2021-01-06 17:00:29,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004235638] [2021-01-06 17:00:29,562 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:29,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-01-06 17:00:29,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:29,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 75 conjunts are in the unsatisfiable core [2021-01-06 17:00:29,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:32,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:32,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 72 [2021-01-06 17:00:32,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444387687] [2021-01-06 17:00:32,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-01-06 17:00:32,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:32,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-01-06 17:00:32,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=4935, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 17:00:32,214 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 72 states. [2021-01-06 17:00:33,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:33,596 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-01-06 17:00:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 17:00:33,596 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 43 [2021-01-06 17:00:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:33,597 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:00:33,597 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:00:33,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=177, Invalid=4935, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 17:00:33,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:00:33,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-01-06 17:00:33,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 17:00:33,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-01-06 17:00:33,604 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2021-01-06 17:00:33,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:33,604 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-01-06 17:00:33,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2021-01-06 17:00:33,604 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-01-06 17:00:33,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 17:00:33,605 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:33,605 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:33,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 17:00:33,820 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:33,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:33,821 INFO L82 PathProgramCache]: Analyzing trace with hash 492142802, now seen corresponding path program 28 times [2021-01-06 17:00:33,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:33,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551975850] [2021-01-06 17:00:33,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:35,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551975850] [2021-01-06 17:00:35,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800246884] [2021-01-06 17:00:35,132 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:35,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:35,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:35,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 77 conjunts are in the unsatisfiable core [2021-01-06 17:00:35,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:35,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:35,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 17:00:35,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799542182] [2021-01-06 17:00:35,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 17:00:35,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:35,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 17:00:35,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:00:35,343 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 40 states. [2021-01-06 17:00:36,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:36,443 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-01-06 17:00:36,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 17:00:36,443 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 45 [2021-01-06 17:00:36,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:36,444 INFO L225 Difference]: With dead ends: 53 [2021-01-06 17:00:36,444 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 17:00:36,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:00:36,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 17:00:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-01-06 17:00:36,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 17:00:36,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-01-06 17:00:36,451 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2021-01-06 17:00:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:36,451 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-01-06 17:00:36,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 17:00:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-01-06 17:00:36,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 17:00:36,451 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:36,451 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:36,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 17:00:36,663 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:36,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:36,663 INFO L82 PathProgramCache]: Analyzing trace with hash -326856166, now seen corresponding path program 29 times [2021-01-06 17:00:36,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:36,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880365508] [2021-01-06 17:00:36,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:38,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880365508] [2021-01-06 17:00:38,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434700910] [2021-01-06 17:00:38,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:38,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-01-06 17:00:38,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:38,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 79 conjunts are in the unsatisfiable core [2021-01-06 17:00:38,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:38,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:38,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 17:00:38,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086882325] [2021-01-06 17:00:38,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 17:00:38,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:38,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 17:00:38,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 17:00:38,235 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 41 states. [2021-01-06 17:00:41,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:41,033 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-01-06 17:00:41,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 17:00:41,033 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 46 [2021-01-06 17:00:41,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:41,034 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:00:41,034 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:00:41,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=228, Invalid=5778, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 17:00:41,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:00:41,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 17:00:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 17:00:41,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-01-06 17:00:41,040 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2021-01-06 17:00:41,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:41,040 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-01-06 17:00:41,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 17:00:41,040 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-01-06 17:00:41,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 17:00:41,041 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:41,041 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:41,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 17:00:41,254 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:41,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:41,254 INFO L82 PathProgramCache]: Analyzing trace with hash 53979602, now seen corresponding path program 30 times [2021-01-06 17:00:41,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:41,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356898812] [2021-01-06 17:00:41,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:42,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356898812] [2021-01-06 17:00:42,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76986852] [2021-01-06 17:00:42,654 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:42,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-01-06 17:00:42,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:42,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 83 conjunts are in the unsatisfiable core [2021-01-06 17:00:42,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:45,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:45,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 80 [2021-01-06 17:00:45,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133231017] [2021-01-06 17:00:45,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-01-06 17:00:45,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:45,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-01-06 17:00:45,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=6123, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 17:00:45,936 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 80 states. [2021-01-06 17:00:47,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:47,685 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-01-06 17:00:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 17:00:47,688 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 47 [2021-01-06 17:00:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:47,690 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:00:47,690 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:00:47,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=197, Invalid=6123, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 17:00:47,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:00:47,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-01-06 17:00:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 17:00:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-01-06 17:00:47,697 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2021-01-06 17:00:47,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:47,697 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-01-06 17:00:47,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2021-01-06 17:00:47,697 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-01-06 17:00:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 17:00:47,697 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:47,698 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:47,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 17:00:47,906 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:47,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:47,907 INFO L82 PathProgramCache]: Analyzing trace with hash -114060590, now seen corresponding path program 31 times [2021-01-06 17:00:47,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:47,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800696706] [2021-01-06 17:00:47,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:49,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800696706] [2021-01-06 17:00:49,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528040108] [2021-01-06 17:00:49,525 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:49,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 85 conjunts are in the unsatisfiable core [2021-01-06 17:00:49,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:49,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:49,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 17:00:49,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737940898] [2021-01-06 17:00:49,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 17:00:49,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:49,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 17:00:49,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 17:00:49,739 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 44 states. [2021-01-06 17:00:51,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:51,166 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-01-06 17:00:51,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 17:00:51,167 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 49 [2021-01-06 17:00:51,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:51,168 INFO L225 Difference]: With dead ends: 57 [2021-01-06 17:00:51,168 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 17:00:51,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 17:00:51,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 17:00:51,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-01-06 17:00:51,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 17:00:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-01-06 17:00:51,172 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2021-01-06 17:00:51,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:51,172 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-01-06 17:00:51,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 17:00:51,172 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-01-06 17:00:51,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 17:00:51,173 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:51,173 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:51,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 17:00:51,373 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:51,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:51,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1939292134, now seen corresponding path program 32 times [2021-01-06 17:00:51,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:51,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588823322] [2021-01-06 17:00:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:53,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588823322] [2021-01-06 17:00:53,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818533187] [2021-01-06 17:00:53,008 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:53,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:53,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:53,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 87 conjunts are in the unsatisfiable core [2021-01-06 17:00:53,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:53,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:53,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 17:00:53,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346763995] [2021-01-06 17:00:53,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 17:00:53,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:53,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 17:00:53,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 17:00:53,258 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 45 states. [2021-01-06 17:00:56,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:56,845 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-01-06 17:00:56,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 17:00:56,846 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 50 [2021-01-06 17:00:56,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:56,847 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:00:56,847 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:00:56,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=252, Invalid=7058, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 17:00:56,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:00:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-01-06 17:00:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 17:00:56,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-01-06 17:00:56,851 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2021-01-06 17:00:56,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:56,851 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-01-06 17:00:56,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 17:00:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-01-06 17:00:56,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 17:00:56,852 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:56,852 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:57,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 17:00:57,054 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:57,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:57,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1608072146, now seen corresponding path program 33 times [2021-01-06 17:00:57,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:57,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986210980] [2021-01-06 17:00:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:58,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986210980] [2021-01-06 17:00:58,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39471400] [2021-01-06 17:00:58,786 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:58,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 17:00:58,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:58,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 91 conjunts are in the unsatisfiable core [2021-01-06 17:00:58,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:03,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:03,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46] total 88 [2021-01-06 17:01:03,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128138543] [2021-01-06 17:01:03,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-01-06 17:01:03,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:03,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-01-06 17:01:03,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=7439, Unknown=0, NotChecked=0, Total=7656 [2021-01-06 17:01:03,013 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 88 states. [2021-01-06 17:01:05,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:05,115 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2021-01-06 17:01:05,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 17:01:05,116 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 51 [2021-01-06 17:01:05,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:05,117 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:01:05,117 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:01:05,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=217, Invalid=7439, Unknown=0, NotChecked=0, Total=7656 [2021-01-06 17:01:05,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:01:05,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-01-06 17:01:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 17:01:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-01-06 17:01:05,124 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2021-01-06 17:01:05,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:05,124 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-01-06 17:01:05,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2021-01-06 17:01:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-01-06 17:01:05,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 17:01:05,125 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:05,125 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:05,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 17:01:05,340 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:05,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:05,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1279744814, now seen corresponding path program 34 times [2021-01-06 17:01:05,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:05,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357919529] [2021-01-06 17:01:05,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:07,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357919529] [2021-01-06 17:01:07,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134132764] [2021-01-06 17:01:07,189 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:07,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:07,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:07,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 93 conjunts are in the unsatisfiable core [2021-01-06 17:01:07,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:07,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:07,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-01-06 17:01:07,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80710450] [2021-01-06 17:01:07,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 17:01:07,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:07,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 17:01:07,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 17:01:07,425 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 48 states. [2021-01-06 17:01:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:11,651 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-01-06 17:01:11,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 17:01:11,652 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 53 [2021-01-06 17:01:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:11,653 INFO L225 Difference]: With dead ends: 61 [2021-01-06 17:01:11,653 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 17:01:11,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=270, Invalid=8102, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 17:01:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 17:01:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-01-06 17:01:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 17:01:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-01-06 17:01:11,658 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2021-01-06 17:01:11,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:11,659 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-01-06 17:01:11,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 17:01:11,659 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-01-06 17:01:11,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 17:01:11,659 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:11,659 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:11,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 17:01:11,873 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:11,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:11,873 INFO L82 PathProgramCache]: Analyzing trace with hash 579202586, now seen corresponding path program 35 times [2021-01-06 17:01:11,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:11,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485857500] [2021-01-06 17:01:11,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:13,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485857500] [2021-01-06 17:01:13,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668504576] [2021-01-06 17:01:13,964 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:14,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 17:01:14,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:14,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 95 conjunts are in the unsatisfiable core [2021-01-06 17:01:14,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:14,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:14,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-01-06 17:01:14,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434977881] [2021-01-06 17:01:14,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 17:01:14,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:14,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 17:01:14,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 17:01:14,248 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 49 states. [2021-01-06 17:01:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:16,162 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-01-06 17:01:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 17:01:16,164 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 54 [2021-01-06 17:01:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:16,164 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:01:16,164 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:01:16,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 17:01:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:01:16,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-01-06 17:01:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 17:01:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-01-06 17:01:16,169 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2021-01-06 17:01:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:16,170 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-01-06 17:01:16,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 17:01:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-01-06 17:01:16,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 17:01:16,170 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:16,170 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:16,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:16,377 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:16,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:16,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1922970158, now seen corresponding path program 36 times [2021-01-06 17:01:16,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:16,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706379813] [2021-01-06 17:01:16,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:18,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706379813] [2021-01-06 17:01:18,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949887831] [2021-01-06 17:01:18,559 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:18,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-01-06 17:01:18,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:18,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 99 conjunts are in the unsatisfiable core [2021-01-06 17:01:18,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:23,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:23,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 96 [2021-01-06 17:01:23,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123814168] [2021-01-06 17:01:23,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-01-06 17:01:23,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:23,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-01-06 17:01:23,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=8883, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 17:01:23,805 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 96 states. [2021-01-06 17:01:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:26,215 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-01-06 17:01:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 17:01:26,216 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 55 [2021-01-06 17:01:26,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:26,217 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:01:26,217 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:01:26,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=237, Invalid=8883, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 17:01:26,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:01:26,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-01-06 17:01:26,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 17:01:26,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-01-06 17:01:26,221 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2021-01-06 17:01:26,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:26,221 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-01-06 17:01:26,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2021-01-06 17:01:26,221 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-01-06 17:01:26,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 17:01:26,222 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:26,222 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:26,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:26,423 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:26,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:26,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1587235118, now seen corresponding path program 37 times [2021-01-06 17:01:26,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:26,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118824870] [2021-01-06 17:01:26,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:28,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118824870] [2021-01-06 17:01:28,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303263238] [2021-01-06 17:01:28,864 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:28,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 101 conjunts are in the unsatisfiable core [2021-01-06 17:01:28,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:29,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:29,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-01-06 17:01:29,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834668223] [2021-01-06 17:01:29,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 17:01:29,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:29,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 17:01:29,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 17:01:29,154 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 52 states. [2021-01-06 17:01:31,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:31,402 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-01-06 17:01:31,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 17:01:31,403 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 57 [2021-01-06 17:01:31,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:31,404 INFO L225 Difference]: With dead ends: 65 [2021-01-06 17:01:31,404 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 17:01:31,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 17:01:31,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 17:01:31,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-01-06 17:01:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 17:01:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-01-06 17:01:31,411 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2021-01-06 17:01:31,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:31,411 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-01-06 17:01:31,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 17:01:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-01-06 17:01:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 17:01:31,412 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:31,412 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:31,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-06 17:01:31,626 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:31,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:31,626 INFO L82 PathProgramCache]: Analyzing trace with hash -363062246, now seen corresponding path program 38 times [2021-01-06 17:01:31,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:31,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012227376] [2021-01-06 17:01:31,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:34,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012227376] [2021-01-06 17:01:34,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871093273] [2021-01-06 17:01:34,310 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:34,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:34,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:34,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 103 conjunts are in the unsatisfiable core [2021-01-06 17:01:34,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:34,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:34,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-01-06 17:01:34,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091057358] [2021-01-06 17:01:34,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 17:01:34,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:34,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 17:01:34,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 17:01:34,599 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 53 states. [2021-01-06 17:01:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:36,961 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-01-06 17:01:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 17:01:36,961 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 58 [2021-01-06 17:01:36,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:36,962 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:01:36,962 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:01:36,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 17:01:36,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:01:36,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-01-06 17:01:36,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 17:01:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-01-06 17:01:36,968 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2021-01-06 17:01:36,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:36,968 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-01-06 17:01:36,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 17:01:36,969 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-01-06 17:01:36,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 17:01:36,969 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:36,969 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:37,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:37,184 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:37,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:37,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1068408878, now seen corresponding path program 39 times [2021-01-06 17:01:37,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:37,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708792920] [2021-01-06 17:01:37,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:39,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708792920] [2021-01-06 17:01:39,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812000867] [2021-01-06 17:01:39,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:39,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-01-06 17:01:39,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:39,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 107 conjunts are in the unsatisfiable core [2021-01-06 17:01:39,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:46,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:46,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54] total 104 [2021-01-06 17:01:46,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292222529] [2021-01-06 17:01:46,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-01-06 17:01:46,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:46,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-01-06 17:01:46,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=10455, Unknown=0, NotChecked=0, Total=10712 [2021-01-06 17:01:46,321 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 104 states. [2021-01-06 17:01:50,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:50,167 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-01-06 17:01:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 17:01:50,168 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 59 [2021-01-06 17:01:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:50,169 INFO L225 Difference]: With dead ends: 70 [2021-01-06 17:01:50,169 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:01:50,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=257, Invalid=10455, Unknown=0, NotChecked=0, Total=10712 [2021-01-06 17:01:50,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:01:50,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-01-06 17:01:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 17:01:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-01-06 17:01:50,175 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2021-01-06 17:01:50,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:50,175 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-01-06 17:01:50,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2021-01-06 17:01:50,175 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-01-06 17:01:50,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 17:01:50,176 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:50,176 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:50,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:50,377 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:50,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:50,377 INFO L82 PathProgramCache]: Analyzing trace with hash -692598574, now seen corresponding path program 40 times [2021-01-06 17:01:50,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:50,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599738822] [2021-01-06 17:01:50,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:53,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599738822] [2021-01-06 17:01:53,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941498475] [2021-01-06 17:01:53,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:53,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:53,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:53,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 109 conjunts are in the unsatisfiable core [2021-01-06 17:01:53,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:53,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:53,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-01-06 17:01:53,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415414211] [2021-01-06 17:01:53,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 17:01:53,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:53,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 17:01:53,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 17:01:53,749 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 56 states. [2021-01-06 17:01:56,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:56,617 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-01-06 17:01:56,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 17:01:56,618 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 61 [2021-01-06 17:01:56,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:56,629 INFO L225 Difference]: With dead ends: 69 [2021-01-06 17:01:56,629 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 17:01:56,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 17:01:56,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 17:01:56,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-01-06 17:01:56,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 17:01:56,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-01-06 17:01:56,635 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2021-01-06 17:01:56,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:56,636 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-01-06 17:01:56,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 17:01:56,636 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-01-06 17:01:56,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 17:01:56,636 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:56,636 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:56,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 17:01:56,846 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:56,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:56,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1600866842, now seen corresponding path program 41 times [2021-01-06 17:01:56,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:56,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611672827] [2021-01-06 17:01:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:00,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611672827] [2021-01-06 17:02:00,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755030932] [2021-01-06 17:02:00,087 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:00,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-01-06 17:02:00,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:00,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 111 conjunts are in the unsatisfiable core [2021-01-06 17:02:00,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:00,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:00,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-01-06 17:02:00,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158353166] [2021-01-06 17:02:00,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 17:02:00,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:00,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 17:02:00,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 17:02:00,431 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 57 states. [2021-01-06 17:02:03,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:03,330 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-01-06 17:02:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 17:02:03,331 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 62 [2021-01-06 17:02:03,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:03,332 INFO L225 Difference]: With dead ends: 70 [2021-01-06 17:02:03,332 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 17:02:03,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 17:02:03,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 17:02:03,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-01-06 17:02:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 17:02:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-01-06 17:02:03,338 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2021-01-06 17:02:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:03,338 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-01-06 17:02:03,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2021-01-06 17:02:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-01-06 17:02:03,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 17:02:03,338 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:03,338 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:03,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 17:02:03,539 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:03,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:03,540 INFO L82 PathProgramCache]: Analyzing trace with hash -316149294, now seen corresponding path program 42 times [2021-01-06 17:02:03,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:03,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842082713] [2021-01-06 17:02:03,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:06,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842082713] [2021-01-06 17:02:06,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699242651] [2021-01-06 17:02:06,699 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:06,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-01-06 17:02:06,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:06,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 115 conjunts are in the unsatisfiable core [2021-01-06 17:02:06,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:14,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:14,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58] total 112 [2021-01-06 17:02:14,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385790687] [2021-01-06 17:02:14,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-01-06 17:02:14,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:14,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-01-06 17:02:14,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=12155, Unknown=0, NotChecked=0, Total=12432 [2021-01-06 17:02:14,685 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 112 states. [2021-01-06 17:02:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:20,729 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-01-06 17:02:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-06 17:02:20,731 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 63 [2021-01-06 17:02:20,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:20,731 INFO L225 Difference]: With dead ends: 74 [2021-01-06 17:02:20,731 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 17:02:20,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=277, Invalid=12155, Unknown=0, NotChecked=0, Total=12432 [2021-01-06 17:02:20,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 17:02:20,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-01-06 17:02:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 17:02:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-01-06 17:02:20,738 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2021-01-06 17:02:20,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:20,738 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-01-06 17:02:20,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 112 states. [2021-01-06 17:02:20,738 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-01-06 17:02:20,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 17:02:20,739 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:20,739 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:20,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 17:02:20,953 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:20,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:20,953 INFO L82 PathProgramCache]: Analyzing trace with hash 674355922, now seen corresponding path program 43 times [2021-01-06 17:02:20,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:20,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458921542] [2021-01-06 17:02:20,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:24,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458921542] [2021-01-06 17:02:24,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877598375] [2021-01-06 17:02:24,503 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:24,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 117 conjunts are in the unsatisfiable core [2021-01-06 17:02:24,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:24,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:24,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-01-06 17:02:24,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256558592] [2021-01-06 17:02:24,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-01-06 17:02:24,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:24,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-01-06 17:02:24,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3422, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 17:02:24,860 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 60 states. [2021-01-06 17:02:33,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:33,051 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2021-01-06 17:02:33,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 17:02:33,052 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 65 [2021-01-06 17:02:33,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:33,053 INFO L225 Difference]: With dead ends: 73 [2021-01-06 17:02:33,053 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 17:02:33,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=342, Invalid=12998, Unknown=0, NotChecked=0, Total=13340 [2021-01-06 17:02:33,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 17:02:33,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-01-06 17:02:33,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 17:02:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-01-06 17:02:33,060 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2021-01-06 17:02:33,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:33,061 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-01-06 17:02:33,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2021-01-06 17:02:33,061 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-01-06 17:02:33,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 17:02:33,061 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:33,061 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:33,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:33,270 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:33,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:33,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1026783258, now seen corresponding path program 44 times [2021-01-06 17:02:33,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:33,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875892869] [2021-01-06 17:02:33,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:37,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875892869] [2021-01-06 17:02:37,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085367025] [2021-01-06 17:02:37,199 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:37,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:02:37,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:37,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 119 conjunts are in the unsatisfiable core [2021-01-06 17:02:37,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:37,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:37,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2021-01-06 17:02:37,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565476122] [2021-01-06 17:02:37,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-01-06 17:02:37,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:37,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-01-06 17:02:37,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 17:02:37,562 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 61 states. [2021-01-06 17:02:41,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:41,494 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-01-06 17:02:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-06 17:02:41,495 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 66 [2021-01-06 17:02:41,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:41,496 INFO L225 Difference]: With dead ends: 74 [2021-01-06 17:02:41,496 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 17:02:41,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 17:02:41,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 17:02:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-01-06 17:02:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 17:02:41,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2021-01-06 17:02:41,504 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2021-01-06 17:02:41,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:41,504 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2021-01-06 17:02:41,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2021-01-06 17:02:41,504 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2021-01-06 17:02:41,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 17:02:41,504 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:41,505 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:41,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 17:02:41,705 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:41,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:41,706 INFO L82 PathProgramCache]: Analyzing trace with hash -932871214, now seen corresponding path program 45 times [2021-01-06 17:02:41,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:41,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144019609] [2021-01-06 17:02:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:45,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144019609] [2021-01-06 17:02:45,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972520283] [2021-01-06 17:02:45,811 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:45,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-01-06 17:02:45,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:45,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 123 conjunts are in the unsatisfiable core [2021-01-06 17:02:45,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:55,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:55,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 62] total 120 [2021-01-06 17:02:55,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453616390] [2021-01-06 17:02:55,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-01-06 17:02:55,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:55,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-01-06 17:02:55,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=13983, Unknown=0, NotChecked=0, Total=14280 [2021-01-06 17:02:55,929 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 120 states. [2021-01-06 17:03:08,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:08,307 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2021-01-06 17:03:08,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 17:03:08,309 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 67 [2021-01-06 17:03:08,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:08,310 INFO L225 Difference]: With dead ends: 78 [2021-01-06 17:03:08,310 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 17:03:08,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=586, Invalid=30920, Unknown=0, NotChecked=0, Total=31506 [2021-01-06 17:03:08,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 17:03:08,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-01-06 17:03:08,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 17:03:08,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2021-01-06 17:03:08,334 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2021-01-06 17:03:08,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:08,334 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2021-01-06 17:03:08,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 120 states. [2021-01-06 17:03:08,334 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2021-01-06 17:03:08,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 17:03:08,335 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:08,335 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:08,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:08,550 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:08,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:08,551 INFO L82 PathProgramCache]: Analyzing trace with hash 710077650, now seen corresponding path program 46 times [2021-01-06 17:03:08,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:08,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403951100] [2021-01-06 17:03:08,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:13,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403951100] [2021-01-06 17:03:13,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94692339] [2021-01-06 17:03:13,507 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:13,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:13,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:13,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 125 conjunts are in the unsatisfiable core [2021-01-06 17:03:13,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:13,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:13,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-01-06 17:03:13,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382502837] [2021-01-06 17:03:13,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-01-06 17:03:13,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:13,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-01-06 17:03:13,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=3906, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 17:03:13,945 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 64 states. [2021-01-06 17:03:19,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:19,397 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2021-01-06 17:03:19,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 17:03:19,398 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 69 [2021-01-06 17:03:19,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:19,399 INFO L225 Difference]: With dead ends: 77 [2021-01-06 17:03:19,399 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 17:03:19,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=126, Invalid=3906, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 17:03:19,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 17:03:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-01-06 17:03:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 17:03:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-01-06 17:03:19,406 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2021-01-06 17:03:19,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:19,406 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-01-06 17:03:19,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2021-01-06 17:03:19,407 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-01-06 17:03:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 17:03:19,407 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:19,407 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:19,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:19,608 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:19,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:19,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2134156826, now seen corresponding path program 47 times [2021-01-06 17:03:19,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:19,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380912387] [2021-01-06 17:03:19,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:25,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380912387] [2021-01-06 17:03:25,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157274305] [2021-01-06 17:03:25,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:25,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2021-01-06 17:03:25,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:25,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 127 conjunts are in the unsatisfiable core [2021-01-06 17:03:25,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:25,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:25,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2021-01-06 17:03:25,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080991241] [2021-01-06 17:03:25,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-01-06 17:03:25,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:25,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-01-06 17:03:25,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 17:03:25,568 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 65 states. [2021-01-06 17:03:29,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:29,800 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-01-06 17:03:29,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-01-06 17:03:29,803 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 70 [2021-01-06 17:03:29,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:29,804 INFO L225 Difference]: With dead ends: 78 [2021-01-06 17:03:29,804 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 17:03:29,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 17:03:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 17:03:29,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-01-06 17:03:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 17:03:29,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-01-06 17:03:29,810 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2021-01-06 17:03:29,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:29,810 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-01-06 17:03:29,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2021-01-06 17:03:29,810 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-01-06 17:03:29,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 17:03:29,811 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:29,811 INFO L422 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:30,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-06 17:03:30,022 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:30,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:30,022 INFO L82 PathProgramCache]: Analyzing trace with hash -964028974, now seen corresponding path program 48 times [2021-01-06 17:03:30,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:30,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707623000] [2021-01-06 17:03:30,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:34,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707623000] [2021-01-06 17:03:34,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259376883] [2021-01-06 17:03:34,721 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:34,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-01-06 17:03:34,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:34,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 131 conjunts are in the unsatisfiable core [2021-01-06 17:03:34,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:45,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:45,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 66] total 128 [2021-01-06 17:03:45,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490487650] [2021-01-06 17:03:45,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 128 states [2021-01-06 17:03:45,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:45,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-01-06 17:03:45,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=15939, Unknown=0, NotChecked=0, Total=16256 [2021-01-06 17:03:45,548 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 128 states.