/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/Mono1_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:55:02,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:55:02,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:55:02,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:55:02,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:55:02,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:55:02,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:55:02,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:55:02,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:55:02,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:55:02,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:55:02,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:55:02,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:55:02,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:55:02,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:55:02,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:55:02,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:55:02,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:55:02,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:55:02,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:55:02,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:55:02,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:55:02,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:55:02,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:55:02,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:55:02,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:55:02,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:55:02,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:55:02,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:55:02,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:55:02,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:55:02,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:55:02,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:55:02,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:55:02,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:55:02,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:55:02,959 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 16:55:03,009 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:55:03,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:55:03,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:55:03,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:55:03,014 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:55:03,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:55:03,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:55:03,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:55:03,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:55:03,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:55:03,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:55:03,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:55:03,018 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:55:03,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:55:03,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:55:03,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:55:03,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:55:03,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:55:03,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:55:03,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:55:03,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:55:03,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:55:03,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:55:03,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:55:03,020 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:55:03,021 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:55:03,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:55:03,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:55:03,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:55:03,501 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:55:03,502 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:55:03,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono1_1-2.c [2021-01-06 16:55:03,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0bdba5083/49889684da4f47acb4c1d88cfdec0537/FLAGd247089f7 [2021-01-06 16:55:04,223 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:55:04,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono1_1-2.c [2021-01-06 16:55:04,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0bdba5083/49889684da4f47acb4c1d88cfdec0537/FLAGd247089f7 [2021-01-06 16:55:04,613 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0bdba5083/49889684da4f47acb4c1d88cfdec0537 [2021-01-06 16:55:04,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:55:04,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:55:04,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:55:04,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:55:04,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:55:04,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:55:04" (1/1) ... [2021-01-06 16:55:04,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e1252f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:04, skipping insertion in model container [2021-01-06 16:55:04,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:55:04" (1/1) ... [2021-01-06 16:55:04,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:55:04,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:55:04,923 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/Mono1_1-2.c[313,326] [2021-01-06 16:55:04,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:55:04,959 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:55:04,978 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/Mono1_1-2.c[313,326] [2021-01-06 16:55:04,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:55:05,000 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:55:05,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:05 WrapperNode [2021-01-06 16:55:05,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:55:05,002 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:55:05,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:55:05,003 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:55:05,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:05" (1/1) ... [2021-01-06 16:55:05,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:05" (1/1) ... [2021-01-06 16:55:05,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:55:05,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:55:05,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:55:05,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:55:05,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:05" (1/1) ... [2021-01-06 16:55:05,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:05" (1/1) ... [2021-01-06 16:55:05,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:05" (1/1) ... [2021-01-06 16:55:05,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:05" (1/1) ... [2021-01-06 16:55:05,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:05" (1/1) ... [2021-01-06 16:55:05,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:05" (1/1) ... [2021-01-06 16:55:05,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:05" (1/1) ... [2021-01-06 16:55:05,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:55:05,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:55:05,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:55:05,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:55:05,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:05" (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 16:55:05,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:55:05,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:55:05,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:55:05,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:55:05,430 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:55:05,431 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:55:05,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:55:05 BoogieIcfgContainer [2021-01-06 16:55:05,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:55:05,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:55:05,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:55:05,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:55:05,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:55:04" (1/3) ... [2021-01-06 16:55:05,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42fe86a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:55:05, skipping insertion in model container [2021-01-06 16:55:05,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:05" (2/3) ... [2021-01-06 16:55:05,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42fe86a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:55:05, skipping insertion in model container [2021-01-06 16:55:05,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:55:05" (3/3) ... [2021-01-06 16:55:05,444 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono1_1-2.c [2021-01-06 16:55:05,452 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:55:05,458 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:55:05,480 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:55:05,513 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:55:05,513 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:55:05,513 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:55:05,514 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:55:05,514 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:55:05,514 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:55:05,514 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:55:05,514 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:55:05,531 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-01-06 16:55:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:55:05,537 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:05,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:55:05,539 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:05,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:05,547 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-01-06 16:55:05,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:05,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296107541] [2021-01-06 16:55:05,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:05,738 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 16:55:05,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296107541] [2021-01-06 16:55:05,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:55:05,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:55:05,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823077246] [2021-01-06 16:55:05,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:55:05,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:05,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:55:05,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:55:05,769 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2021-01-06 16:55:05,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:05,788 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2021-01-06 16:55:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:55:05,790 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 16:55:05,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:05,800 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:55:05,801 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 16:55:05,804 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 16:55:05,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 16:55:05,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 16:55:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 16:55:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-01-06 16:55:05,845 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-01-06 16:55:05,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:05,846 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-01-06 16:55:05,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:55:05,846 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-01-06 16:55:05,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:55:05,847 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:05,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:55:05,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:55:05,848 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:05,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:05,849 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2021-01-06 16:55:05,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:05,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176423126] [2021-01-06 16:55:05,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:05,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:05,973 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 16:55:05,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176423126] [2021-01-06 16:55:05,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:55:05,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:55:05,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033932789] [2021-01-06 16:55:05,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:55:05,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:05,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:55:05,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:55:05,989 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2021-01-06 16:55:06,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:06,063 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2021-01-06 16:55:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:55:06,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:55:06,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:06,066 INFO L225 Difference]: With dead ends: 16 [2021-01-06 16:55:06,066 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:55:06,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 16:55:06,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:55:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-01-06 16:55:06,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 16:55:06,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-01-06 16:55:06,081 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-01-06 16:55:06,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:06,081 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-01-06 16:55:06,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:55:06,081 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-01-06 16:55:06,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:55:06,082 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:06,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:06,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:55:06,083 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:06,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:06,084 INFO L82 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2021-01-06 16:55:06,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:06,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550104794] [2021-01-06 16:55:06,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:06,188 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 16:55:06,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550104794] [2021-01-06 16:55:06,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869721489] [2021-01-06 16:55:06,189 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 16:55:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:06,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:55:06,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:06,289 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 16:55:06,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:06,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:55:06,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873515899] [2021-01-06 16:55:06,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:55:06,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:06,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:55:06,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:55:06,293 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2021-01-06 16:55:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:06,328 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2021-01-06 16:55:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:55:06,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 16:55:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:06,330 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:55:06,330 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:55:06,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 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 16:55:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:55:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 16:55:06,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:55:06,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-01-06 16:55:06,335 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-01-06 16:55:06,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:06,336 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-01-06 16:55:06,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:55:06,336 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-01-06 16:55:06,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:55:06,337 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:06,337 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:06,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:55:06,551 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:06,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:06,554 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2021-01-06 16:55:06,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:06,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447063376] [2021-01-06 16:55:06,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:06,708 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 16:55:06,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447063376] [2021-01-06 16:55:06,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317152841] [2021-01-06 16:55:06,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:55:06,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:06,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:06,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:55:06,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:06,904 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 16:55:06,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:06,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:55:06,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27010281] [2021-01-06 16:55:06,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:55:06,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:06,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:55:06,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:55:06,908 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2021-01-06 16:55:06,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:06,944 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-01-06 16:55:06,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:55:06,945 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 16:55:06,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:06,946 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:55:06,946 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:55:06,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:55:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:55:06,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 16:55:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:55:06,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-01-06 16:55:06,951 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2021-01-06 16:55:06,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:06,951 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-01-06 16:55:06,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:55:06,952 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-01-06 16:55:06,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:55:06,952 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:06,952 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:07,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:07,166 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:07,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:07,168 INFO L82 PathProgramCache]: Analyzing trace with hash 570787482, now seen corresponding path program 3 times [2021-01-06 16:55:07,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:07,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911129579] [2021-01-06 16:55:07,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:07,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911129579] [2021-01-06 16:55:07,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204613397] [2021-01-06 16:55:07,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:07,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 16:55:07,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:07,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:55:07,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:55:07,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:55:07,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-01-06 16:55:07,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878131490] [2021-01-06 16:55:07,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:55:07,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:07,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:55:07,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:55:07,480 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2021-01-06 16:55:07,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:07,516 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-01-06 16:55:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:55:07,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2021-01-06 16:55:07,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:07,520 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:55:07,520 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 16:55:07,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:55:07,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 16:55:07,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-01-06 16:55:07,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 16:55:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 16:55:07,527 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-01-06 16:55:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:07,532 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 16:55:07,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:55:07,533 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 16:55:07,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:55:07,534 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:07,534 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:07,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:07,754 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:07,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:07,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1176853889, now seen corresponding path program 1 times [2021-01-06 16:55:07,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:07,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529604620] [2021-01-06 16:55:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:07,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529604620] [2021-01-06 16:55:07,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93245425] [2021-01-06 16:55:07,901 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 16:55:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:07,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:55:07,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:08,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:08,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:55:08,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344437693] [2021-01-06 16:55:08,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:55:08,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:08,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:55:08,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:55:08,076 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2021-01-06 16:55:08,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:08,129 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-01-06 16:55:08,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:55:08,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2021-01-06 16:55:08,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:08,130 INFO L225 Difference]: With dead ends: 24 [2021-01-06 16:55:08,130 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 16:55:08,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:55:08,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 16:55:08,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 16:55:08,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:55:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 16:55:08,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2021-01-06 16:55:08,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:08,136 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 16:55:08,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:55:08,137 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 16:55:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:55:08,137 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:08,137 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:08,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:08,353 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:08,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:08,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1191961250, now seen corresponding path program 2 times [2021-01-06 16:55:08,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:08,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138377451] [2021-01-06 16:55:08,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:08,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138377451] [2021-01-06 16:55:08,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793825962] [2021-01-06 16:55:08,514 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 16:55:08,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:08,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:08,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:55:08,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:08,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:08,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-01-06 16:55:08,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949800581] [2021-01-06 16:55:08,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:55:08,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:08,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:55:08,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:55:08,648 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2021-01-06 16:55:08,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:08,744 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-01-06 16:55:08,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:55:08,745 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2021-01-06 16:55:08,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:08,747 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:55:08,747 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 16:55:08,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:55:08,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 16:55:08,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 16:55:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:55:08,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-01-06 16:55:08,761 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2021-01-06 16:55:08,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:08,761 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-01-06 16:55:08,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:55:08,762 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-01-06 16:55:08,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:55:08,763 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:08,763 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:08,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:55:08,980 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:08,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:08,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1290642949, now seen corresponding path program 3 times [2021-01-06 16:55:08,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:08,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737968858] [2021-01-06 16:55:08,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:09,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737968858] [2021-01-06 16:55:09,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240549170] [2021-01-06 16:55:09,180 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 16:55:09,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:55:09,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:09,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:55:09,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 16:55:09,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:09,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-01-06 16:55:09,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052568809] [2021-01-06 16:55:09,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:55:09,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:09,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:55:09,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:55:09,355 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2021-01-06 16:55:09,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:09,487 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2021-01-06 16:55:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:55:09,488 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2021-01-06 16:55:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:09,488 INFO L225 Difference]: With dead ends: 31 [2021-01-06 16:55:09,489 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 16:55:09,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:55:09,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 16:55:09,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 16:55:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 16:55:09,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-01-06 16:55:09,495 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2021-01-06 16:55:09,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:09,495 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-01-06 16:55:09,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:55:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-01-06 16:55:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:55:09,496 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:09,496 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:09,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:09,698 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:09,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:09,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1175196403, now seen corresponding path program 4 times [2021-01-06 16:55:09,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:09,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417238166] [2021-01-06 16:55:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:55:09,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417238166] [2021-01-06 16:55:09,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383168306] [2021-01-06 16:55:09,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:09,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:55:09,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:09,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:55:09,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:55:09,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:09,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:55:09,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923718745] [2021-01-06 16:55:09,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:55:09,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:09,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:55:09,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:55:09,986 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2021-01-06 16:55:10,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:10,110 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-01-06 16:55:10,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:55:10,111 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2021-01-06 16:55:10,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:10,112 INFO L225 Difference]: With dead ends: 36 [2021-01-06 16:55:10,112 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:55:10,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:55:10,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:55:10,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 16:55:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 16:55:10,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-01-06 16:55:10,119 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2021-01-06 16:55:10,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:10,119 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-01-06 16:55:10,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:55:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-01-06 16:55:10,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:55:10,120 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:10,121 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:10,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:10,336 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:10,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:10,337 INFO L82 PathProgramCache]: Analyzing trace with hash -415213008, now seen corresponding path program 5 times [2021-01-06 16:55:10,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:10,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813793588] [2021-01-06 16:55:10,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:55:10,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813793588] [2021-01-06 16:55:10,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444293908] [2021-01-06 16:55:10,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:10,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 16:55:10,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:10,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:55:10,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:55:10,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:10,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:55:10,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519774429] [2021-01-06 16:55:10,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:55:10,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:10,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:55:10,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:55:10,851 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 11 states. [2021-01-06 16:55:10,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:10,972 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-01-06 16:55:10,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:55:10,973 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2021-01-06 16:55:10,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:10,974 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:55:10,974 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 16:55:10,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:55:10,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 16:55:10,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 16:55:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 16:55:10,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 16:55:10,980 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2021-01-06 16:55:10,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:10,981 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 16:55:10,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:55:10,981 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 16:55:10,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:55:10,982 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:10,982 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:11,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:55:11,190 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:11,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:11,191 INFO L82 PathProgramCache]: Analyzing trace with hash -215610733, now seen corresponding path program 6 times [2021-01-06 16:55:11,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:11,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481938428] [2021-01-06 16:55:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:55:11,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481938428] [2021-01-06 16:55:11,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851291221] [2021-01-06 16:55:11,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:11,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 16:55:11,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:11,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:55:11,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:11,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:11,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 14 [2021-01-06 16:55:11,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477914434] [2021-01-06 16:55:11,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:55:11,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:11,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:55:11,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:55:11,587 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2021-01-06 16:55:11,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:11,758 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-01-06 16:55:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:55:11,758 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2021-01-06 16:55:11,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:11,759 INFO L225 Difference]: With dead ends: 40 [2021-01-06 16:55:11,760 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 16:55:11,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:55:11,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 16:55:11,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 16:55:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 16:55:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-01-06 16:55:11,766 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2021-01-06 16:55:11,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:11,766 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-01-06 16:55:11,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:55:11,766 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-01-06 16:55:11,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:55:11,767 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:11,767 INFO L422 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:11,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:11,976 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:11,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:11,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1671352778, now seen corresponding path program 7 times [2021-01-06 16:55:11,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:11,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006222972] [2021-01-06 16:55:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:55:12,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006222972] [2021-01-06 16:55:12,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173920458] [2021-01-06 16:55:12,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:12,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:55:12,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:55:12,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:12,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:55:12,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399041320] [2021-01-06 16:55:12,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:55:12,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:12,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:55:12,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:55:12,333 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2021-01-06 16:55:12,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:12,520 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-01-06 16:55:12,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:55:12,525 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2021-01-06 16:55:12,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:12,527 INFO L225 Difference]: With dead ends: 42 [2021-01-06 16:55:12,527 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 16:55:12,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:55:12,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 16:55:12,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 16:55:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 16:55:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-01-06 16:55:12,541 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2021-01-06 16:55:12,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:12,542 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-01-06 16:55:12,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:55:12,542 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-01-06 16:55:12,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:55:12,545 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:12,546 INFO L422 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:12,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:12,761 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:12,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:12,763 INFO L82 PathProgramCache]: Analyzing trace with hash -480119527, now seen corresponding path program 8 times [2021-01-06 16:55:12,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:12,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566841298] [2021-01-06 16:55:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:55:12,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566841298] [2021-01-06 16:55:12,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242264615] [2021-01-06 16:55:12,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:13,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:13,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:55:13,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:13,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:13,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 16 [2021-01-06 16:55:13,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529306645] [2021-01-06 16:55:13,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:55:13,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:13,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:55:13,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:55:13,206 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2021-01-06 16:55:13,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:13,441 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-01-06 16:55:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:55:13,442 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2021-01-06 16:55:13,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:13,443 INFO L225 Difference]: With dead ends: 44 [2021-01-06 16:55:13,443 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 16:55:13,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:55:13,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 16:55:13,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-01-06 16:55:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 16:55:13,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-01-06 16:55:13,450 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 30 [2021-01-06 16:55:13,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:13,450 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-01-06 16:55:13,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:55:13,451 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-01-06 16:55:13,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:55:13,451 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:13,452 INFO L422 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:13,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:55:13,666 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:13,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:13,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1833733948, now seen corresponding path program 9 times [2021-01-06 16:55:13,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:13,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718615835] [2021-01-06 16:55:13,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:55:13,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718615835] [2021-01-06 16:55:13,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192972952] [2021-01-06 16:55:13,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:14,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:55:14,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:14,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:55:14,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 4 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-01-06 16:55:14,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:14,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2021-01-06 16:55:14,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081317847] [2021-01-06 16:55:14,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:55:14,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:14,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:55:14,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:55:14,194 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2021-01-06 16:55:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:14,701 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-01-06 16:55:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:55:14,702 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2021-01-06 16:55:14,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:14,702 INFO L225 Difference]: With dead ends: 50 [2021-01-06 16:55:14,703 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 16:55:14,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:55:14,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 16:55:14,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-01-06 16:55:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 16:55:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-01-06 16:55:14,713 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2021-01-06 16:55:14,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:14,716 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-01-06 16:55:14,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:55:14,717 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-01-06 16:55:14,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:55:14,718 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:14,718 INFO L422 BasicCegarLoop]: trace histogram [15, 12, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:14,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:55:14,932 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:14,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:14,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1350359876, now seen corresponding path program 10 times [2021-01-06 16:55:14,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:14,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812983933] [2021-01-06 16:55:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 65 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:55:15,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812983933] [2021-01-06 16:55:15,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494754607] [2021-01-06 16:55:15,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:15,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:55:15,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:15,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:55:15,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 65 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:55:15,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:15,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:55:15,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592571843] [2021-01-06 16:55:15,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:55:15,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:15,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:55:15,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:55:15,381 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 16 states. [2021-01-06 16:55:15,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:15,656 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-01-06 16:55:15,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:55:15,657 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2021-01-06 16:55:15,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:15,658 INFO L225 Difference]: With dead ends: 52 [2021-01-06 16:55:15,658 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 16:55:15,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:55:15,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 16:55:15,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-01-06 16:55:15,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 16:55:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-01-06 16:55:15,664 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 36 [2021-01-06 16:55:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:15,664 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-01-06 16:55:15,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:55:15,665 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-01-06 16:55:15,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:55:15,665 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:15,665 INFO L422 BasicCegarLoop]: trace histogram [16, 13, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:15,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:55:15,879 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:15,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:15,880 INFO L82 PathProgramCache]: Analyzing trace with hash -33157337, now seen corresponding path program 11 times [2021-01-06 16:55:15,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:15,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858068226] [2021-01-06 16:55:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:55:16,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858068226] [2021-01-06 16:55:16,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957173608] [2021-01-06 16:55:16,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:16,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-01-06 16:55:16,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:16,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:55:16,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:55:16,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:16,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:55:16,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896902800] [2021-01-06 16:55:16,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:55:16,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:16,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:55:16,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:55:16,835 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 17 states. [2021-01-06 16:55:17,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:17,150 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-01-06 16:55:17,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:55:17,151 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2021-01-06 16:55:17,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:17,153 INFO L225 Difference]: With dead ends: 54 [2021-01-06 16:55:17,153 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 16:55:17,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 13 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:55:17,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 16:55:17,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 16:55:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 16:55:17,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-01-06 16:55:17,177 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 38 [2021-01-06 16:55:17,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:17,178 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-01-06 16:55:17,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:55:17,178 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-01-06 16:55:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 16:55:17,179 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:17,179 INFO L422 BasicCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:17,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:17,380 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:17,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:17,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1846662730, now seen corresponding path program 12 times [2021-01-06 16:55:17,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:17,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386303954] [2021-01-06 16:55:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:55:17,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386303954] [2021-01-06 16:55:17,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174486438] [2021-01-06 16:55:17,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:17,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 16:55:17,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:17,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:55:17,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 98 proven. 9 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-01-06 16:55:18,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:18,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 21 [2021-01-06 16:55:18,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225001452] [2021-01-06 16:55:18,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:55:18,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:18,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:55:18,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:55:18,275 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2021-01-06 16:55:19,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:19,063 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-01-06 16:55:19,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:55:19,064 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2021-01-06 16:55:19,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:19,064 INFO L225 Difference]: With dead ends: 60 [2021-01-06 16:55:19,064 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 16:55:19,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:55:19,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 16:55:19,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-01-06 16:55:19,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 16:55:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-01-06 16:55:19,070 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 40 [2021-01-06 16:55:19,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:19,071 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-01-06 16:55:19,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:55:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-01-06 16:55:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 16:55:19,072 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:19,072 INFO L422 BasicCegarLoop]: trace histogram [19, 15, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:19,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:55:19,280 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:19,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:19,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1664138286, now seen corresponding path program 13 times [2021-01-06 16:55:19,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:19,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512166081] [2021-01-06 16:55:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:55:19,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512166081] [2021-01-06 16:55:19,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834150576] [2021-01-06 16:55:19,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:19,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 16:55:19,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:55:19,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:19,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:55:19,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513675701] [2021-01-06 16:55:19,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:55:19,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:19,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:55:19,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:55:19,808 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 19 states. [2021-01-06 16:55:20,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:20,209 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2021-01-06 16:55:20,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:55:20,210 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2021-01-06 16:55:20,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:20,211 INFO L225 Difference]: With dead ends: 62 [2021-01-06 16:55:20,211 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 16:55:20,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:55:20,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 16:55:20,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 16:55:20,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 16:55:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-01-06 16:55:20,217 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 44 [2021-01-06 16:55:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:20,217 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-01-06 16:55:20,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:55:20,218 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-01-06 16:55:20,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:55:20,218 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:20,219 INFO L422 BasicCegarLoop]: trace histogram [20, 16, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:20,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:55:20,432 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:20,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:20,433 INFO L82 PathProgramCache]: Analyzing trace with hash -870062923, now seen corresponding path program 14 times [2021-01-06 16:55:20,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:20,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779911029] [2021-01-06 16:55:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:55:20,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779911029] [2021-01-06 16:55:20,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645721068] [2021-01-06 16:55:20,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:20,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:20,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:20,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:55:20,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:21,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:21,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 24 [2021-01-06 16:55:21,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553141732] [2021-01-06 16:55:21,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:55:21,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:21,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:55:21,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:55:21,173 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2021-01-06 16:55:21,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:21,717 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2021-01-06 16:55:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:55:21,718 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2021-01-06 16:55:21,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:21,718 INFO L225 Difference]: With dead ends: 64 [2021-01-06 16:55:21,718 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 16:55:21,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:55:21,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 16:55:21,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-01-06 16:55:21,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 16:55:21,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-01-06 16:55:21,724 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2021-01-06 16:55:21,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:21,725 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-01-06 16:55:21,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:55:21,725 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-01-06 16:55:21,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 16:55:21,725 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:21,725 INFO L422 BasicCegarLoop]: trace histogram [21, 17, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:21,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:21,939 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:21,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:21,940 INFO L82 PathProgramCache]: Analyzing trace with hash 2027149528, now seen corresponding path program 15 times [2021-01-06 16:55:21,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:21,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793195852] [2021-01-06 16:55:21,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:55:22,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793195852] [2021-01-06 16:55:22,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902806619] [2021-01-06 16:55:22,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:22,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:55:22,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:22,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:55:22,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 153 proven. 16 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-01-06 16:55:22,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:22,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7] total 25 [2021-01-06 16:55:22,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093792457] [2021-01-06 16:55:22,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:55:22,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:22,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:55:22,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:55:22,883 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2021-01-06 16:55:24,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:24,236 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2021-01-06 16:55:24,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:55:24,237 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2021-01-06 16:55:24,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:24,239 INFO L225 Difference]: With dead ends: 70 [2021-01-06 16:55:24,239 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 16:55:24,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:55:24,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 16:55:24,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-01-06 16:55:24,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 16:55:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-01-06 16:55:24,244 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2021-01-06 16:55:24,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:24,244 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-01-06 16:55:24,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:55:24,244 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-01-06 16:55:24,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 16:55:24,245 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:24,245 INFO L422 BasicCegarLoop]: trace histogram [23, 18, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:24,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:24,451 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:24,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1008695328, now seen corresponding path program 16 times [2021-01-06 16:55:24,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:24,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989483875] [2021-01-06 16:55:24,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 171 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:55:24,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989483875] [2021-01-06 16:55:24,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247143221] [2021-01-06 16:55:24,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:24,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:55:24,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:24,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:55:24,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 171 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:55:25,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:25,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 16:55:25,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619692769] [2021-01-06 16:55:25,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:55:25,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:25,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:55:25,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:55:25,091 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 22 states. [2021-01-06 16:55:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:25,653 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2021-01-06 16:55:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:55:25,654 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2021-01-06 16:55:25,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:25,655 INFO L225 Difference]: With dead ends: 72 [2021-01-06 16:55:25,655 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 16:55:25,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:55:25,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 16:55:25,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-01-06 16:55:25,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 16:55:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-01-06 16:55:25,660 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2021-01-06 16:55:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:25,661 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-01-06 16:55:25,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:55:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-01-06 16:55:25,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 16:55:25,662 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:25,662 INFO L422 BasicCegarLoop]: trace histogram [24, 19, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:25,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:25,878 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:25,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:25,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1656515133, now seen corresponding path program 17 times [2021-01-06 16:55:25,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:25,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706447082] [2021-01-06 16:55:25,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:55:26,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706447082] [2021-01-06 16:55:26,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059872822] [2021-01-06 16:55:26,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:27,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-01-06 16:55:27,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:27,437 WARN L261 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 16:55:27,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:55:28,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:28,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:55:28,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815161739] [2021-01-06 16:55:28,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:55:28,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:28,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:55:28,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:55:28,007 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 23 states. [2021-01-06 16:55:28,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:28,707 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2021-01-06 16:55:28,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:55:28,710 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2021-01-06 16:55:28,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:28,711 INFO L225 Difference]: With dead ends: 74 [2021-01-06 16:55:28,711 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 16:55:28,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 21 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:55:28,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 16:55:28,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-01-06 16:55:28,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 16:55:28,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-01-06 16:55:28,716 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 54 [2021-01-06 16:55:28,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:28,716 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-01-06 16:55:28,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:55:28,717 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-01-06 16:55:28,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 16:55:28,717 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:28,717 INFO L422 BasicCegarLoop]: trace histogram [25, 20, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:28,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:55:28,925 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:28,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:28,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1441089818, now seen corresponding path program 18 times [2021-01-06 16:55:28,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:28,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844759453] [2021-01-06 16:55:28,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:55:29,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844759453] [2021-01-06 16:55:29,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765436898] [2021-01-06 16:55:29,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:30,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-01-06 16:55:30,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:30,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:55:30,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 220 proven. 25 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-01-06 16:55:31,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:31,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2021-01-06 16:55:31,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669156347] [2021-01-06 16:55:31,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:55:31,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:31,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:55:31,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:55:31,086 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2021-01-06 16:55:33,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:33,246 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-01-06 16:55:33,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:55:33,246 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2021-01-06 16:55:33,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:33,247 INFO L225 Difference]: With dead ends: 80 [2021-01-06 16:55:33,247 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 16:55:33,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:55:33,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 16:55:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-01-06 16:55:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 16:55:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-01-06 16:55:33,252 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 56 [2021-01-06 16:55:33,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:33,253 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-01-06 16:55:33,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:55:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-01-06 16:55:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 16:55:33,253 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:33,253 INFO L422 BasicCegarLoop]: trace histogram [27, 21, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:33,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 16:55:33,455 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:33,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:33,456 INFO L82 PathProgramCache]: Analyzing trace with hash 766560110, now seen corresponding path program 19 times [2021-01-06 16:55:33,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:33,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559895849] [2021-01-06 16:55:33,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 242 proven. 462 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 16:55:34,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559895849] [2021-01-06 16:55:34,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858069978] [2021-01-06 16:55:34,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:34,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 16:55:34,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 242 proven. 462 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 16:55:34,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:34,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 16:55:34,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630351043] [2021-01-06 16:55:34,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:55:34,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:34,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:55:34,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:55:34,298 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 25 states. [2021-01-06 16:55:35,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:35,106 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2021-01-06 16:55:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:55:35,106 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2021-01-06 16:55:35,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:35,108 INFO L225 Difference]: With dead ends: 82 [2021-01-06 16:55:35,108 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 16:55:35,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:55:35,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 16:55:35,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-01-06 16:55:35,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 16:55:35,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-01-06 16:55:35,112 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 60 [2021-01-06 16:55:35,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:35,113 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-01-06 16:55:35,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:55:35,113 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-01-06 16:55:35,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 16:55:35,114 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:35,114 INFO L422 BasicCegarLoop]: trace histogram [28, 22, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:35,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:35,328 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:35,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:35,329 INFO L82 PathProgramCache]: Analyzing trace with hash -429571503, now seen corresponding path program 20 times [2021-01-06 16:55:35,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:35,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861853665] [2021-01-06 16:55:35,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 16:55:35,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861853665] [2021-01-06 16:55:35,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625254519] [2021-01-06 16:55:35,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:35,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:35,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:35,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 67 conjunts are in the unsatisfiable core [2021-01-06 16:55:35,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:36,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:36,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 32 [2021-01-06 16:55:36,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204406906] [2021-01-06 16:55:36,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:55:36,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:36,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:55:36,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:55:36,401 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2021-01-06 16:55:37,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:37,411 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2021-01-06 16:55:37,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:55:37,412 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2021-01-06 16:55:37,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:37,413 INFO L225 Difference]: With dead ends: 84 [2021-01-06 16:55:37,413 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 16:55:37,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:55:37,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 16:55:37,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-01-06 16:55:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 16:55:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-01-06 16:55:37,423 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2021-01-06 16:55:37,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:37,424 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-01-06 16:55:37,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:55:37,424 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-01-06 16:55:37,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 16:55:37,425 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:37,425 INFO L422 BasicCegarLoop]: trace histogram [29, 23, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:37,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 16:55:37,640 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:37,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:37,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1139183732, now seen corresponding path program 21 times [2021-01-06 16:55:37,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:37,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610917170] [2021-01-06 16:55:37,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 16:55:38,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610917170] [2021-01-06 16:55:38,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665201685] [2021-01-06 16:55:38,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:38,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-01-06 16:55:38,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:38,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:55:38,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 299 proven. 36 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-01-06 16:55:39,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:39,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2021-01-06 16:55:39,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552792662] [2021-01-06 16:55:39,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:55:39,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:39,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:55:39,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:55:39,159 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2021-01-06 16:55:41,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:41,950 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2021-01-06 16:55:41,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:55:41,951 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2021-01-06 16:55:41,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:41,951 INFO L225 Difference]: With dead ends: 90 [2021-01-06 16:55:41,952 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 16:55:41,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=219, Invalid=1341, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:55:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 16:55:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-01-06 16:55:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 16:55:41,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-01-06 16:55:41,958 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 64 [2021-01-06 16:55:41,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:41,959 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-01-06 16:55:41,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:55:41,959 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-01-06 16:55:41,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 16:55:41,959 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:41,959 INFO L422 BasicCegarLoop]: trace histogram [31, 24, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:42,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:42,160 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:42,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:42,161 INFO L82 PathProgramCache]: Analyzing trace with hash -373808516, now seen corresponding path program 22 times [2021-01-06 16:55:42,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:42,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678279350] [2021-01-06 16:55:42,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 325 proven. 600 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:55:42,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678279350] [2021-01-06 16:55:42,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679576500] [2021-01-06 16:55:42,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:42,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:55:42,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:42,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 16:55:42,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 325 proven. 600 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:55:43,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:43,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 16:55:43,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967327234] [2021-01-06 16:55:43,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:55:43,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:43,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:55:43,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:55:43,120 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 28 states. [2021-01-06 16:55:44,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:44,105 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2021-01-06 16:55:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:55:44,105 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 68 [2021-01-06 16:55:44,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:44,107 INFO L225 Difference]: With dead ends: 92 [2021-01-06 16:55:44,107 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 16:55:44,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:55:44,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 16:55:44,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-01-06 16:55:44,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 16:55:44,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-01-06 16:55:44,113 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 68 [2021-01-06 16:55:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:44,114 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-01-06 16:55:44,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:55:44,114 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-01-06 16:55:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 16:55:44,114 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:44,114 INFO L422 BasicCegarLoop]: trace histogram [32, 25, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:44,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 16:55:44,320 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:44,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:44,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1006564769, now seen corresponding path program 23 times [2021-01-06 16:55:44,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:44,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187585385] [2021-01-06 16:55:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:55:45,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187585385] [2021-01-06 16:55:45,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815038644] [2021-01-06 16:55:45,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:54,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2021-01-06 16:55:54,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:54,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 16:55:54,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 252 proven. 756 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:55:54,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:54,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 31 [2021-01-06 16:55:54,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966909555] [2021-01-06 16:55:54,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:55:54,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:54,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:55:54,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:55:54,774 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 31 states. [2021-01-06 16:55:55,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:55,939 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-01-06 16:55:55,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:55:55,940 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2021-01-06 16:55:55,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:55,941 INFO L225 Difference]: With dead ends: 94 [2021-01-06 16:55:55,941 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 16:55:55,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:55:55,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 16:55:55,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-01-06 16:55:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 16:55:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-01-06 16:55:55,948 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2021-01-06 16:55:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:55,948 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-01-06 16:55:55,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:55:55,948 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-01-06 16:55:55,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 16:55:55,949 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:55,949 INFO L422 BasicCegarLoop]: trace histogram [33, 26, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:56,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:55:56,155 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:56,156 INFO L82 PathProgramCache]: Analyzing trace with hash 800032130, now seen corresponding path program 24 times [2021-01-06 16:55:56,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:56,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668715808] [2021-01-06 16:55:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:55:56,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668715808] [2021-01-06 16:55:56,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305691739] [2021-01-06 16:55:56,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:58,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-01-06 16:55:58,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:58,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:55:58,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 390 proven. 49 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-01-06 16:55:59,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:59,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10] total 37 [2021-01-06 16:55:59,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552166116] [2021-01-06 16:55:59,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:55:59,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:59,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:55:59,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:55:59,649 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2021-01-06 16:56:02,454 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2021-01-06 16:56:04,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:04,340 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2021-01-06 16:56:04,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:56:04,341 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2021-01-06 16:56:04,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:04,341 INFO L225 Difference]: With dead ends: 100 [2021-01-06 16:56:04,342 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 16:56:04,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:56:04,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 16:56:04,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-01-06 16:56:04,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 16:56:04,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-01-06 16:56:04,348 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 72 [2021-01-06 16:56:04,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:04,348 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-01-06 16:56:04,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:56:04,348 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-01-06 16:56:04,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 16:56:04,349 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:04,349 INFO L422 BasicCegarLoop]: trace histogram [35, 27, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:04,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:56:04,552 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:04,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:04,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1327056630, now seen corresponding path program 25 times [2021-01-06 16:56:04,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:04,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768919960] [2021-01-06 16:56:04,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 420 proven. 756 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 16:56:05,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768919960] [2021-01-06 16:56:05,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119191259] [2021-01-06 16:56:05,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:05,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 16:56:05,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 420 proven. 756 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 16:56:05,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:05,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 16:56:05,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301712328] [2021-01-06 16:56:05,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:56:05,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:05,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:56:05,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:56:05,680 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 31 states. [2021-01-06 16:56:06,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:06,905 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2021-01-06 16:56:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:56:06,907 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2021-01-06 16:56:06,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:06,908 INFO L225 Difference]: With dead ends: 102 [2021-01-06 16:56:06,908 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 16:56:06,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:56:06,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 16:56:06,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-01-06 16:56:06,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 16:56:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-01-06 16:56:06,914 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2021-01-06 16:56:06,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:06,914 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-01-06 16:56:06,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:56:06,915 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-01-06 16:56:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 16:56:06,915 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:06,915 INFO L422 BasicCegarLoop]: trace histogram [36, 28, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:07,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:07,124 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:07,125 INFO L82 PathProgramCache]: Analyzing trace with hash -66646547, now seen corresponding path program 26 times [2021-01-06 16:56:07,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:07,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189675996] [2021-01-06 16:56:07,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 16:56:08,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189675996] [2021-01-06 16:56:08,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031494886] [2021-01-06 16:56:08,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:08,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:56:08,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:08,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 83 conjunts are in the unsatisfiable core [2021-01-06 16:56:08,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:56:08,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:08,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 39] total 40 [2021-01-06 16:56:08,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152893875] [2021-01-06 16:56:08,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:56:08,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:08,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:56:08,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:56:08,677 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2021-01-06 16:56:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:10,342 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-01-06 16:56:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:56:10,343 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2021-01-06 16:56:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:10,344 INFO L225 Difference]: With dead ends: 104 [2021-01-06 16:56:10,344 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 16:56:10,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:56:10,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 16:56:10,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-01-06 16:56:10,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 16:56:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2021-01-06 16:56:10,351 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2021-01-06 16:56:10,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:10,352 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2021-01-06 16:56:10,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:56:10,352 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2021-01-06 16:56:10,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 16:56:10,352 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:10,353 INFO L422 BasicCegarLoop]: trace histogram [37, 29, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:10,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 16:56:10,557 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:10,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:10,558 INFO L82 PathProgramCache]: Analyzing trace with hash 6665744, now seen corresponding path program 27 times [2021-01-06 16:56:10,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:10,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148867012] [2021-01-06 16:56:10,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 16:56:11,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148867012] [2021-01-06 16:56:11,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601729120] [2021-01-06 16:56:11,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:11,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-01-06 16:56:11,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:11,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:56:11,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 357 proven. 592 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-01-06 16:56:13,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:13,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 19] total 41 [2021-01-06 16:56:13,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800419622] [2021-01-06 16:56:13,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:56:13,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:13,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:56:13,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1504, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:56:13,454 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2021-01-06 16:56:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:16,363 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2021-01-06 16:56:16,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:56:16,364 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2021-01-06 16:56:16,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:16,364 INFO L225 Difference]: With dead ends: 108 [2021-01-06 16:56:16,364 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 16:56:16,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:56:16,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 16:56:16,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-01-06 16:56:16,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 16:56:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2021-01-06 16:56:16,373 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 80 [2021-01-06 16:56:16,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:16,373 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2021-01-06 16:56:16,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:56:16,373 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2021-01-06 16:56:16,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 16:56:16,374 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:16,374 INFO L422 BasicCegarLoop]: trace histogram [39, 30, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:16,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:16,578 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:16,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:16,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1738844952, now seen corresponding path program 28 times [2021-01-06 16:56:16,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:16,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302744123] [2021-01-06 16:56:16,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 527 proven. 930 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 16:56:17,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302744123] [2021-01-06 16:56:17,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731970613] [2021-01-06 16:56:17,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:17,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:56:17,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:17,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 64 conjunts are in the unsatisfiable core [2021-01-06 16:56:17,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 527 proven. 930 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 16:56:17,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:17,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 16:56:17,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731245719] [2021-01-06 16:56:17,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:56:17,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:17,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:56:17,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:56:17,865 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 34 states. [2021-01-06 16:56:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:19,221 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-01-06 16:56:19,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:56:19,222 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 84 [2021-01-06 16:56:19,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:19,223 INFO L225 Difference]: With dead ends: 112 [2021-01-06 16:56:19,223 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 16:56:19,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:56:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 16:56:19,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-01-06 16:56:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 16:56:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-01-06 16:56:19,233 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2021-01-06 16:56:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:19,234 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-01-06 16:56:19,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:56:19,234 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-01-06 16:56:19,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 16:56:19,235 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:19,235 INFO L422 BasicCegarLoop]: trace histogram [40, 31, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:19,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 16:56:19,450 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:19,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2145348859, now seen corresponding path program 29 times [2021-01-06 16:56:19,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:19,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012410999] [2021-01-06 16:56:19,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 16:56:20,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012410999] [2021-01-06 16:56:20,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131275623] [2021-01-06 16:56:20,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:39,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2021-01-06 16:56:39,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:39,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 82 conjunts are in the unsatisfiable core [2021-01-06 16:56:39,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 190 proven. 1406 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:56:40,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:40,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 40] total 41 [2021-01-06 16:56:40,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088581569] [2021-01-06 16:56:40,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:56:40,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:40,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:56:40,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1529, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:56:40,571 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 41 states. [2021-01-06 16:56:42,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:42,399 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2021-01-06 16:56:42,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:56:42,400 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2021-01-06 16:56:42,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:42,401 INFO L225 Difference]: With dead ends: 114 [2021-01-06 16:56:42,401 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 16:56:42,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=1529, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:56:42,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 16:56:42,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-01-06 16:56:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 16:56:42,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-01-06 16:56:42,407 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 86 [2021-01-06 16:56:42,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:42,407 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-01-06 16:56:42,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:56:42,408 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-01-06 16:56:42,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 16:56:42,408 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:42,408 INFO L422 BasicCegarLoop]: trace histogram [41, 32, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:42,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 16:56:42,614 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:42,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:42,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1953579550, now seen corresponding path program 30 times [2021-01-06 16:56:42,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:42,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483022564] [2021-01-06 16:56:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 16:56:43,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483022564] [2021-01-06 16:56:43,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452073674] [2021-01-06 16:56:43,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:49,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2021-01-06 16:56:49,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:49,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 120 conjunts are in the unsatisfiable core [2021-01-06 16:56:49,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 647 proven. 960 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-01-06 16:56:55,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:55,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 61 [2021-01-06 16:56:55,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181063019] [2021-01-06 16:56:55,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-01-06 16:56:55,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:55,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-01-06 16:56:55,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=2982, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:56:55,847 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 61 states. [2021-01-06 16:56:59,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:59,669 INFO L93 Difference]: Finished difference Result 150 states and 173 transitions. [2021-01-06 16:56:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 16:56:59,669 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 88 [2021-01-06 16:56:59,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:59,671 INFO L225 Difference]: With dead ends: 150 [2021-01-06 16:56:59,671 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 16:56:59,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 18 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=713, Invalid=3069, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 16:56:59,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 16:56:59,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2021-01-06 16:56:59,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 16:56:59,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2021-01-06 16:56:59,680 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 88 [2021-01-06 16:56:59,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:59,680 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2021-01-06 16:56:59,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2021-01-06 16:56:59,680 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2021-01-06 16:56:59,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-01-06 16:56:59,681 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:59,681 INFO L422 BasicCegarLoop]: trace histogram [43, 33, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:59,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:56:59,886 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:59,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:59,887 INFO L82 PathProgramCache]: Analyzing trace with hash 533862566, now seen corresponding path program 31 times [2021-01-06 16:56:59,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:59,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365621204] [2021-01-06 16:56:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 646 proven. 1122 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:57:01,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365621204] [2021-01-06 16:57:01,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347277977] [2021-01-06 16:57:01,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:01,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 70 conjunts are in the unsatisfiable core [2021-01-06 16:57:01,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 646 proven. 1122 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:57:01,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:01,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 16:57:01,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499997101] [2021-01-06 16:57:01,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:57:01,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:01,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:57:01,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:57:01,398 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 37 states. [2021-01-06 16:57:03,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:03,206 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2021-01-06 16:57:03,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 16:57:03,207 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 92 [2021-01-06 16:57:03,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:03,209 INFO L225 Difference]: With dead ends: 122 [2021-01-06 16:57:03,209 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 16:57:03,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:57:03,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 16:57:03,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-01-06 16:57:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 16:57:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-01-06 16:57:03,215 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 92 [2021-01-06 16:57:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:03,216 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-01-06 16:57:03,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:57:03,216 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-01-06 16:57:03,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 16:57:03,217 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:03,217 INFO L422 BasicCegarLoop]: trace histogram [44, 34, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:03,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 16:57:03,432 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:03,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:03,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1852458889, now seen corresponding path program 32 times [2021-01-06 16:57:03,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:03,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789210557] [2021-01-06 16:57:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:57:04,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789210557] [2021-01-06 16:57:04,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828381081] [2021-01-06 16:57:04,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:04,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:57:04,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:04,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 99 conjunts are in the unsatisfiable core [2021-01-06 16:57:04,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:57:05,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:05,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 47] total 48 [2021-01-06 16:57:05,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933809468] [2021-01-06 16:57:05,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 16:57:05,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:05,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 16:57:05,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:57:05,642 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 48 states. [2021-01-06 16:57:08,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:08,247 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2021-01-06 16:57:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:57:08,248 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2021-01-06 16:57:08,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:08,249 INFO L225 Difference]: With dead ends: 124 [2021-01-06 16:57:08,249 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 16:57:08,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=128, Invalid=2128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:57:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 16:57:08,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-01-06 16:57:08,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 16:57:08,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2021-01-06 16:57:08,257 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 94 [2021-01-06 16:57:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:08,257 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2021-01-06 16:57:08,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 16:57:08,258 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2021-01-06 16:57:08,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 16:57:08,259 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:08,259 INFO L422 BasicCegarLoop]: trace histogram [45, 35, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:08,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 16:57:08,474 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:08,475 INFO L82 PathProgramCache]: Analyzing trace with hash 2008172972, now seen corresponding path program 33 times [2021-01-06 16:57:08,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:08,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419181474] [2021-01-06 16:57:08,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:57:09,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419181474] [2021-01-06 16:57:09,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394163546] [2021-01-06 16:57:09,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:10,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 16:57:10,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:10,141 WARN L261 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 66 conjunts are in the unsatisfiable core [2021-01-06 16:57:10,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 630 proven. 525 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2021-01-06 16:57:14,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:14,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 18] total 49 [2021-01-06 16:57:14,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325498785] [2021-01-06 16:57:14,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 16:57:14,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:14,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 16:57:14,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2188, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:57:14,224 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 49 states. [2021-01-06 16:57:18,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:18,802 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2021-01-06 16:57:18,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 16:57:18,803 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2021-01-06 16:57:18,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:18,804 INFO L225 Difference]: With dead ends: 128 [2021-01-06 16:57:18,804 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 16:57:18,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 73 SyntacticMatches, 14 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=202, Invalid=2248, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:57:18,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 16:57:18,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-01-06 16:57:18,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 16:57:18,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2021-01-06 16:57:18,812 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 96 [2021-01-06 16:57:18,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:18,812 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2021-01-06 16:57:18,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 16:57:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2021-01-06 16:57:18,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 16:57:18,814 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:18,814 INFO L422 BasicCegarLoop]: trace histogram [47, 36, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:19,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 16:57:19,017 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:19,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:19,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1698225740, now seen corresponding path program 34 times [2021-01-06 16:57:19,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:19,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267795065] [2021-01-06 16:57:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 777 proven. 1332 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:57:20,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267795065] [2021-01-06 16:57:20,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523883690] [2021-01-06 16:57:20,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:20,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:57:20,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:20,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 76 conjunts are in the unsatisfiable core [2021-01-06 16:57:20,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 777 proven. 1332 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:57:20,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:20,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 16:57:20,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149691078] [2021-01-06 16:57:20,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:57:20,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:20,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:57:20,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:57:20,752 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 40 states. [2021-01-06 16:57:23,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:23,125 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2021-01-06 16:57:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:57:23,126 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 100 [2021-01-06 16:57:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:23,127 INFO L225 Difference]: With dead ends: 132 [2021-01-06 16:57:23,127 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 16:57:23,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:57:23,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 16:57:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-01-06 16:57:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 16:57:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2021-01-06 16:57:23,136 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 100 [2021-01-06 16:57:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:23,137 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2021-01-06 16:57:23,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:57:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2021-01-06 16:57:23,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-01-06 16:57:23,138 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:23,138 INFO L422 BasicCegarLoop]: trace histogram [48, 37, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:23,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 16:57:23,353 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:23,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:23,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1778401897, now seen corresponding path program 35 times [2021-01-06 16:57:23,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:23,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670161738] [2021-01-06 16:57:23,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:57:24,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670161738] [2021-01-06 16:57:24,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135666257] [2021-01-06 16:57:24,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:28,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-01-06 16:58:28,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:28,534 WARN L261 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 126 conjunts are in the unsatisfiable core [2021-01-06 16:58:28,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:58:30,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:30,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 16:58:30,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981493877] [2021-01-06 16:58:30,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:58:30,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:30,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:58:30,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:58:30,309 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 41 states. [2021-01-06 16:58:32,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:32,941 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2021-01-06 16:58:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 16:58:32,942 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 102 [2021-01-06 16:58:32,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:32,943 INFO L225 Difference]: With dead ends: 134 [2021-01-06 16:58:32,943 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 16:58:32,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 76 SyntacticMatches, 27 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:58:32,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 16:58:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-01-06 16:58:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 16:58:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2021-01-06 16:58:32,950 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 102 [2021-01-06 16:58:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:32,950 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2021-01-06 16:58:32,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:58:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2021-01-06 16:58:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-01-06 16:58:32,952 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:32,952 INFO L422 BasicCegarLoop]: trace histogram [49, 38, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:33,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 16:58:33,159 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:33,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:33,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1518277446, now seen corresponding path program 36 times [2021-01-06 16:58:33,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:33,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348529574] [2021-01-06 16:58:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:58:34,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348529574] [2021-01-06 16:58:34,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191120788] [2021-01-06 16:58:34,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:45,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2021-01-06 16:58:45,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:45,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:58:45,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 874 proven. 121 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2021-01-06 16:58:46,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:46,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 14] total 53 [2021-01-06 16:58:46,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889229734] [2021-01-06 16:58:46,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 16:58:46,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:46,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 16:58:46,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2335, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:58:46,694 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 53 states. [2021-01-06 16:58:51,978 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 12 [2021-01-06 16:58:53,832 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 12 [2021-01-06 16:58:57,393 WARN L197 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 12 [2021-01-06 16:59:00,506 WARN L197 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 12 [2021-01-06 16:59:02,251 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 12 [2021-01-06 16:59:04,352 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 12 [2021-01-06 16:59:05,860 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2021-01-06 16:59:08,017 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 12 [2021-01-06 16:59:09,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:09,430 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2021-01-06 16:59:09,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 16:59:09,431 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2021-01-06 16:59:09,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:09,431 INFO L225 Difference]: With dead ends: 140 [2021-01-06 16:59:09,431 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 16:59:09,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=605, Invalid=3555, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 16:59:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 16:59:09,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2021-01-06 16:59:09,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-01-06 16:59:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2021-01-06 16:59:09,441 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 104 [2021-01-06 16:59:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:09,441 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2021-01-06 16:59:09,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 16:59:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2021-01-06 16:59:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-01-06 16:59:09,443 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:09,443 INFO L422 BasicCegarLoop]: trace histogram [51, 39, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:09,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:09,648 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:09,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1263789634, now seen corresponding path program 37 times [2021-01-06 16:59:09,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:09,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620275643] [2021-01-06 16:59:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 920 proven. 1560 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 16:59:11,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620275643] [2021-01-06 16:59:11,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955588629] [2021-01-06 16:59:11,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:11,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 82 conjunts are in the unsatisfiable core [2021-01-06 16:59:11,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 920 proven. 1560 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 16:59:12,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:12,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 16:59:12,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187792731] [2021-01-06 16:59:12,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:59:12,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:12,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:59:12,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:59:12,035 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 43 states. [2021-01-06 16:59:15,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:15,280 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2021-01-06 16:59:15,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 16:59:15,281 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 108 [2021-01-06 16:59:15,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:15,282 INFO L225 Difference]: With dead ends: 142 [2021-01-06 16:59:15,282 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 16:59:15,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:59:15,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 16:59:15,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-01-06 16:59:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 16:59:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2021-01-06 16:59:15,290 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 108 [2021-01-06 16:59:15,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:15,291 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2021-01-06 16:59:15,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:59:15,291 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2021-01-06 16:59:15,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-01-06 16:59:15,292 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:15,292 INFO L422 BasicCegarLoop]: trace histogram [52, 40, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:15,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:15,507 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:15,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:15,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1987047205, now seen corresponding path program 38 times [2021-01-06 16:59:15,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:15,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783364377] [2021-01-06 16:59:15,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 16:59:17,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783364377] [2021-01-06 16:59:17,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450810498] [2021-01-06 16:59:17,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:17,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:59:17,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:17,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 115 conjunts are in the unsatisfiable core [2021-01-06 16:59:17,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:18,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:18,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 55] total 56 [2021-01-06 16:59:18,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382895339] [2021-01-06 16:59:18,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 16:59:18,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:18,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 16:59:18,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:59:18,913 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2021-01-06 16:59:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:23,368 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2021-01-06 16:59:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:59:23,369 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2021-01-06 16:59:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:23,370 INFO L225 Difference]: With dead ends: 144 [2021-01-06 16:59:23,370 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 16:59:23,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:59:23,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 16:59:23,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-01-06 16:59:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-01-06 16:59:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2021-01-06 16:59:23,379 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 110 [2021-01-06 16:59:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:23,379 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2021-01-06 16:59:23,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 16:59:23,380 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2021-01-06 16:59:23,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 16:59:23,380 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:23,380 INFO L422 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:23,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-06 16:59:23,594 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:23,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1252870984, now seen corresponding path program 39 times [2021-01-06 16:59:23,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:23,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005881022] [2021-01-06 16:59:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat