/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/product-lines/email_spec27_product19.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:27:31,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:27:31,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:27:31,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:27:31,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:27:31,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:27:31,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:27:31,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:27:31,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:27:31,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:27:31,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:27:31,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:27:31,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:27:31,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:27:31,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:27:31,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:27:31,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:27:31,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:27:31,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:27:31,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:27:31,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:27:31,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:27:31,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:27:31,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:27:31,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:27:31,974 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:27:31,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:27:31,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:27:31,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:27:31,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:27:31,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:27:31,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:27:31,982 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:27:31,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:27:31,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:27:31,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:27:31,985 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:27:32,043 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:27:32,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:27:32,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:27:32,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:27:32,048 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:27:32,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:27:32,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:27:32,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:27:32,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:27:32,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:27:32,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:27:32,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:27:32,052 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:27:32,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:27:32,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:27:32,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:27:32,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:27:32,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:27:32,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:27:32,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:27:32,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:27:32,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:27:32,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:27:32,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:27:32,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:27:32,056 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/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:27:32,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:27:32,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:27:32,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:27:32,512 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:27:32,513 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:27:32,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/email_spec27_product19.cil.c [2020-12-22 06:27:32,601 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f8e3b8c8/86b46a6817604fe8a7df6433df8a314a/FLAGbb8cb2bb8 [2020-12-22 06:27:33,449 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:27:33,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec27_product19.cil.c [2020-12-22 06:27:33,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f8e3b8c8/86b46a6817604fe8a7df6433df8a314a/FLAGbb8cb2bb8 [2020-12-22 06:27:33,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f8e3b8c8/86b46a6817604fe8a7df6433df8a314a [2020-12-22 06:27:33,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:27:33,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:27:33,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:27:33,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:27:33,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:27:33,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:27:33" (1/1) ... [2020-12-22 06:27:33,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f0f57bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:33, skipping insertion in model container [2020-12-22 06:27:33,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:27:33" (1/1) ... [2020-12-22 06:27:33,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:27:33,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:27:34,121 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec27_product19.cil.c[17438,17451] [2020-12-22 06:27:34,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:27:34,349 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:27:34,432 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec27_product19.cil.c[17438,17451] [2020-12-22 06:27:34,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:27:34,639 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:27:34,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:34 WrapperNode [2020-12-22 06:27:34,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:27:34,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:27:34,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:27:34,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:27:34,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:34" (1/1) ... [2020-12-22 06:27:34,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:34" (1/1) ... [2020-12-22 06:27:34,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:27:34,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:27:34,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:27:34,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:27:34,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:34" (1/1) ... [2020-12-22 06:27:34,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:34" (1/1) ... [2020-12-22 06:27:34,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:34" (1/1) ... [2020-12-22 06:27:34,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:34" (1/1) ... [2020-12-22 06:27:34,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:34" (1/1) ... [2020-12-22 06:27:34,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:34" (1/1) ... [2020-12-22 06:27:34,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:34" (1/1) ... [2020-12-22 06:27:34,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:27:34,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:27:34,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:27:34,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:27:34,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:27:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-12-22 06:27:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:27:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:27:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:27:35,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:27:37,312 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:27:37,312 INFO L299 CfgBuilder]: Removed 303 assume(true) statements. [2020-12-22 06:27:37,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:27:37 BoogieIcfgContainer [2020-12-22 06:27:37,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:27:37,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:27:37,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:27:37,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:27:37,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:27:33" (1/3) ... [2020-12-22 06:27:37,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bbe9a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:27:37, skipping insertion in model container [2020-12-22 06:27:37,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:34" (2/3) ... [2020-12-22 06:27:37,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bbe9a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:27:37, skipping insertion in model container [2020-12-22 06:27:37,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:27:37" (3/3) ... [2020-12-22 06:27:37,325 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product19.cil.c [2020-12-22 06:27:37,331 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:27:37,337 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 06:27:37,357 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 06:27:37,388 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:27:37,388 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:27:37,389 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:27:37,389 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:27:37,389 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:27:37,389 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:27:37,389 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:27:37,390 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:27:37,415 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states. [2020-12-22 06:27:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 06:27:37,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:37,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:37,431 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:37,438 INFO L82 PathProgramCache]: Analyzing trace with hash -167129029, now seen corresponding path program 1 times [2020-12-22 06:27:37,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:37,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661015489] [2020-12-22 06:27:37,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:37,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661015489] [2020-12-22 06:27:37,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:37,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:37,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350316480] [2020-12-22 06:27:37,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:37,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:37,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:37,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:37,966 INFO L87 Difference]: Start difference. First operand 467 states. Second operand 3 states. [2020-12-22 06:27:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:38,171 INFO L93 Difference]: Finished difference Result 1366 states and 2378 transitions. [2020-12-22 06:27:38,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:38,174 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 06:27:38,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:38,198 INFO L225 Difference]: With dead ends: 1366 [2020-12-22 06:27:38,199 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 06:27:38,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:38,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 06:27:38,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 430. [2020-12-22 06:27:38,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-12-22 06:27:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 747 transitions. [2020-12-22 06:27:38,294 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 747 transitions. Word has length 48 [2020-12-22 06:27:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:38,294 INFO L481 AbstractCegarLoop]: Abstraction has 430 states and 747 transitions. [2020-12-22 06:27:38,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:38,294 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 747 transitions. [2020-12-22 06:27:38,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 06:27:38,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:38,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:38,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:27:38,299 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:38,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:38,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1311500302, now seen corresponding path program 1 times [2020-12-22 06:27:38,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:38,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180820350] [2020-12-22 06:27:38,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:38,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180820350] [2020-12-22 06:27:38,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:38,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:27:38,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692359756] [2020-12-22 06:27:38,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:38,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:38,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:38,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:38,430 INFO L87 Difference]: Start difference. First operand 430 states and 747 transitions. Second operand 5 states. [2020-12-22 06:27:38,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:38,683 INFO L93 Difference]: Finished difference Result 1239 states and 2157 transitions. [2020-12-22 06:27:38,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:27:38,684 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-12-22 06:27:38,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:38,693 INFO L225 Difference]: With dead ends: 1239 [2020-12-22 06:27:38,693 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 06:27:38,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:27:38,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 06:27:38,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 430. [2020-12-22 06:27:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-12-22 06:27:38,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 746 transitions. [2020-12-22 06:27:38,745 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 746 transitions. Word has length 50 [2020-12-22 06:27:38,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:38,745 INFO L481 AbstractCegarLoop]: Abstraction has 430 states and 746 transitions. [2020-12-22 06:27:38,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:38,746 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 746 transitions. [2020-12-22 06:27:38,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 06:27:38,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:38,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:38,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:27:38,751 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:38,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:38,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1098779109, now seen corresponding path program 1 times [2020-12-22 06:27:38,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:38,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913859574] [2020-12-22 06:27:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:38,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913859574] [2020-12-22 06:27:38,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:38,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:38,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895585732] [2020-12-22 06:27:38,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:38,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:38,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:38,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:38,943 INFO L87 Difference]: Start difference. First operand 430 states and 746 transitions. Second operand 3 states. [2020-12-22 06:27:38,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:38,996 INFO L93 Difference]: Finished difference Result 842 states and 1466 transitions. [2020-12-22 06:27:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:38,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 06:27:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:39,000 INFO L225 Difference]: With dead ends: 842 [2020-12-22 06:27:39,000 INFO L226 Difference]: Without dead ends: 435 [2020-12-22 06:27:39,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-12-22 06:27:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 430. [2020-12-22 06:27:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-12-22 06:27:39,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 745 transitions. [2020-12-22 06:27:39,019 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 745 transitions. Word has length 51 [2020-12-22 06:27:39,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:39,019 INFO L481 AbstractCegarLoop]: Abstraction has 430 states and 745 transitions. [2020-12-22 06:27:39,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:39,020 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 745 transitions. [2020-12-22 06:27:39,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:27:39,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:39,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:39,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:27:39,022 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:39,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:39,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1661226655, now seen corresponding path program 1 times [2020-12-22 06:27:39,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:39,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801518044] [2020-12-22 06:27:39,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:39,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801518044] [2020-12-22 06:27:39,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:39,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:39,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166520743] [2020-12-22 06:27:39,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:39,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:39,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:39,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:39,122 INFO L87 Difference]: Start difference. First operand 430 states and 745 transitions. Second operand 3 states. [2020-12-22 06:27:39,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:39,181 INFO L93 Difference]: Finished difference Result 852 states and 1479 transitions. [2020-12-22 06:27:39,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:39,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 06:27:39,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:39,185 INFO L225 Difference]: With dead ends: 852 [2020-12-22 06:27:39,185 INFO L226 Difference]: Without dead ends: 430 [2020-12-22 06:27:39,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:39,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-12-22 06:27:39,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 430. [2020-12-22 06:27:39,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-12-22 06:27:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 743 transitions. [2020-12-22 06:27:39,206 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 743 transitions. Word has length 52 [2020-12-22 06:27:39,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:39,208 INFO L481 AbstractCegarLoop]: Abstraction has 430 states and 743 transitions. [2020-12-22 06:27:39,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:39,208 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 743 transitions. [2020-12-22 06:27:39,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:27:39,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:39,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:39,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:27:39,210 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:39,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:39,211 INFO L82 PathProgramCache]: Analyzing trace with hash -755664714, now seen corresponding path program 1 times [2020-12-22 06:27:39,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:39,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157509318] [2020-12-22 06:27:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:39,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157509318] [2020-12-22 06:27:39,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:39,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:27:39,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668545626] [2020-12-22 06:27:39,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:39,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:39,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:39,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:39,351 INFO L87 Difference]: Start difference. First operand 430 states and 743 transitions. Second operand 5 states. [2020-12-22 06:27:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:39,530 INFO L93 Difference]: Finished difference Result 1229 states and 2137 transitions. [2020-12-22 06:27:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:27:39,531 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-12-22 06:27:39,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:39,536 INFO L225 Difference]: With dead ends: 1229 [2020-12-22 06:27:39,537 INFO L226 Difference]: Without dead ends: 826 [2020-12-22 06:27:39,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:27:39,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2020-12-22 06:27:39,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 430. [2020-12-22 06:27:39,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-12-22 06:27:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 742 transitions. [2020-12-22 06:27:39,563 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 742 transitions. Word has length 53 [2020-12-22 06:27:39,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:39,564 INFO L481 AbstractCegarLoop]: Abstraction has 430 states and 742 transitions. [2020-12-22 06:27:39,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:39,564 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 742 transitions. [2020-12-22 06:27:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:27:39,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:39,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:39,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:27:39,567 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:39,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:39,568 INFO L82 PathProgramCache]: Analyzing trace with hash 574282393, now seen corresponding path program 1 times [2020-12-22 06:27:39,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:39,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925471983] [2020-12-22 06:27:39,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:39,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925471983] [2020-12-22 06:27:39,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:39,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:27:39,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128222417] [2020-12-22 06:27:39,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:39,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:39,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:39,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:39,682 INFO L87 Difference]: Start difference. First operand 430 states and 742 transitions. Second operand 5 states. [2020-12-22 06:27:39,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:39,891 INFO L93 Difference]: Finished difference Result 1234 states and 2142 transitions. [2020-12-22 06:27:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:27:39,891 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 06:27:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:39,897 INFO L225 Difference]: With dead ends: 1234 [2020-12-22 06:27:39,897 INFO L226 Difference]: Without dead ends: 831 [2020-12-22 06:27:39,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:27:39,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-12-22 06:27:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 430. [2020-12-22 06:27:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-12-22 06:27:39,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 741 transitions. [2020-12-22 06:27:39,931 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 741 transitions. Word has length 54 [2020-12-22 06:27:39,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:39,931 INFO L481 AbstractCegarLoop]: Abstraction has 430 states and 741 transitions. [2020-12-22 06:27:39,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:39,932 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 741 transitions. [2020-12-22 06:27:39,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:27:39,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:39,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:39,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:27:39,934 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:39,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:39,939 INFO L82 PathProgramCache]: Analyzing trace with hash -314537551, now seen corresponding path program 1 times [2020-12-22 06:27:39,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:39,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193711283] [2020-12-22 06:27:39,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:40,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193711283] [2020-12-22 06:27:40,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:40,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:40,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116930486] [2020-12-22 06:27:40,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:40,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:40,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:40,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:40,049 INFO L87 Difference]: Start difference. First operand 430 states and 741 transitions. Second operand 3 states. [2020-12-22 06:27:40,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:40,087 INFO L93 Difference]: Finished difference Result 622 states and 1058 transitions. [2020-12-22 06:27:40,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:40,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 06:27:40,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:40,091 INFO L225 Difference]: With dead ends: 622 [2020-12-22 06:27:40,091 INFO L226 Difference]: Without dead ends: 433 [2020-12-22 06:27:40,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-12-22 06:27:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 432. [2020-12-22 06:27:40,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2020-12-22 06:27:40,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 743 transitions. [2020-12-22 06:27:40,125 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 743 transitions. Word has length 55 [2020-12-22 06:27:40,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:40,127 INFO L481 AbstractCegarLoop]: Abstraction has 432 states and 743 transitions. [2020-12-22 06:27:40,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:40,127 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 743 transitions. [2020-12-22 06:27:40,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:27:40,129 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:40,129 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:40,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:27:40,129 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:40,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:40,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1143669585, now seen corresponding path program 1 times [2020-12-22 06:27:40,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:40,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486674890] [2020-12-22 06:27:40,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:40,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486674890] [2020-12-22 06:27:40,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:40,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:40,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867410091] [2020-12-22 06:27:40,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:40,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:40,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:40,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:40,219 INFO L87 Difference]: Start difference. First operand 432 states and 743 transitions. Second operand 3 states. [2020-12-22 06:27:40,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:40,282 INFO L93 Difference]: Finished difference Result 1182 states and 2053 transitions. [2020-12-22 06:27:40,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:40,283 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 06:27:40,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:40,288 INFO L225 Difference]: With dead ends: 1182 [2020-12-22 06:27:40,288 INFO L226 Difference]: Without dead ends: 781 [2020-12-22 06:27:40,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:40,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2020-12-22 06:27:40,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 592. [2020-12-22 06:27:40,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2020-12-22 06:27:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1036 transitions. [2020-12-22 06:27:40,328 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1036 transitions. Word has length 61 [2020-12-22 06:27:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:40,328 INFO L481 AbstractCegarLoop]: Abstraction has 592 states and 1036 transitions. [2020-12-22 06:27:40,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:40,328 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1036 transitions. [2020-12-22 06:27:40,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 06:27:40,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:40,330 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:40,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:27:40,332 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:40,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:40,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1474526130, now seen corresponding path program 1 times [2020-12-22 06:27:40,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:40,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30432290] [2020-12-22 06:27:40,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:40,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30432290] [2020-12-22 06:27:40,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730304919] [2020-12-22 06:27:40,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:27:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:40,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 06:27:40,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:27:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:40,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:27:40,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 06:27:40,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108130251] [2020-12-22 06:27:40,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:40,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:40,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:40,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:40,982 INFO L87 Difference]: Start difference. First operand 592 states and 1036 transitions. Second operand 5 states. [2020-12-22 06:27:41,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:41,079 INFO L93 Difference]: Finished difference Result 1186 states and 2056 transitions. [2020-12-22 06:27:41,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:27:41,080 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 06:27:41,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:41,085 INFO L225 Difference]: With dead ends: 1186 [2020-12-22 06:27:41,086 INFO L226 Difference]: Without dead ends: 997 [2020-12-22 06:27:41,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-12-22 06:27:41,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 806. [2020-12-22 06:27:41,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2020-12-22 06:27:41,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1426 transitions. [2020-12-22 06:27:41,175 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1426 transitions. Word has length 62 [2020-12-22 06:27:41,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:41,176 INFO L481 AbstractCegarLoop]: Abstraction has 806 states and 1426 transitions. [2020-12-22 06:27:41,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1426 transitions. [2020-12-22 06:27:41,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 06:27:41,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:41,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:41,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 06:27:41,392 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:41,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:41,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1555299743, now seen corresponding path program 1 times [2020-12-22 06:27:41,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:41,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588365508] [2020-12-22 06:27:41,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:41,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588365508] [2020-12-22 06:27:41,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:41,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:41,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317503528] [2020-12-22 06:27:41,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:41,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:41,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:41,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:41,493 INFO L87 Difference]: Start difference. First operand 806 states and 1426 transitions. Second operand 3 states. [2020-12-22 06:27:41,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:41,582 INFO L93 Difference]: Finished difference Result 2084 states and 3702 transitions. [2020-12-22 06:27:41,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:41,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 06:27:41,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:41,590 INFO L225 Difference]: With dead ends: 2084 [2020-12-22 06:27:41,590 INFO L226 Difference]: Without dead ends: 1367 [2020-12-22 06:27:41,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:41,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2020-12-22 06:27:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1178. [2020-12-22 06:27:41,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1178 states. [2020-12-22 06:27:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 2104 transitions. [2020-12-22 06:27:41,666 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 2104 transitions. Word has length 68 [2020-12-22 06:27:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:41,666 INFO L481 AbstractCegarLoop]: Abstraction has 1178 states and 2104 transitions. [2020-12-22 06:27:41,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:41,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 2104 transitions. [2020-12-22 06:27:41,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:27:41,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:41,673 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:41,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:27:41,673 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:41,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:41,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1412706543, now seen corresponding path program 2 times [2020-12-22 06:27:41,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:41,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373861679] [2020-12-22 06:27:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:41,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373861679] [2020-12-22 06:27:41,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:41,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:27:41,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482152466] [2020-12-22 06:27:41,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:41,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:41,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:41,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:41,800 INFO L87 Difference]: Start difference. First operand 1178 states and 2104 transitions. Second operand 5 states. [2020-12-22 06:27:41,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:41,973 INFO L93 Difference]: Finished difference Result 2298 states and 4090 transitions. [2020-12-22 06:27:41,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:27:41,974 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 06:27:41,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:41,987 INFO L225 Difference]: With dead ends: 2298 [2020-12-22 06:27:41,987 INFO L226 Difference]: Without dead ends: 1367 [2020-12-22 06:27:41,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:27:41,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2020-12-22 06:27:42,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1178. [2020-12-22 06:27:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1178 states. [2020-12-22 06:27:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 2102 transitions. [2020-12-22 06:27:42,126 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 2102 transitions. Word has length 69 [2020-12-22 06:27:42,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:42,126 INFO L481 AbstractCegarLoop]: Abstraction has 1178 states and 2102 transitions. [2020-12-22 06:27:42,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:42,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 2102 transitions. [2020-12-22 06:27:42,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:27:42,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:42,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:42,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:27:42,136 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:42,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:42,137 INFO L82 PathProgramCache]: Analyzing trace with hash 782357296, now seen corresponding path program 1 times [2020-12-22 06:27:42,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:42,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60657548] [2020-12-22 06:27:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:42,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60657548] [2020-12-22 06:27:42,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:42,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:42,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168124161] [2020-12-22 06:27:42,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:42,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:42,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:42,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:42,249 INFO L87 Difference]: Start difference. First operand 1178 states and 2102 transitions. Second operand 3 states. [2020-12-22 06:27:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:42,427 INFO L93 Difference]: Finished difference Result 3172 states and 5685 transitions. [2020-12-22 06:27:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:42,428 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 06:27:42,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:42,439 INFO L225 Difference]: With dead ends: 3172 [2020-12-22 06:27:42,440 INFO L226 Difference]: Without dead ends: 2091 [2020-12-22 06:27:42,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:42,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2020-12-22 06:27:42,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1902. [2020-12-22 06:27:42,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-12-22 06:27:42,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 3421 transitions. [2020-12-22 06:27:42,627 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 3421 transitions. Word has length 69 [2020-12-22 06:27:42,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:42,629 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 3421 transitions. [2020-12-22 06:27:42,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:42,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 3421 transitions. [2020-12-22 06:27:42,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 06:27:42,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:42,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:42,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:27:42,633 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:42,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:42,634 INFO L82 PathProgramCache]: Analyzing trace with hash 570724387, now seen corresponding path program 1 times [2020-12-22 06:27:42,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:42,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550473252] [2020-12-22 06:27:42,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:42,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550473252] [2020-12-22 06:27:42,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:42,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:42,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735808654] [2020-12-22 06:27:42,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:42,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:42,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:42,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:42,726 INFO L87 Difference]: Start difference. First operand 1902 states and 3421 transitions. Second operand 3 states. [2020-12-22 06:27:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:42,948 INFO L93 Difference]: Finished difference Result 5080 states and 9161 transitions. [2020-12-22 06:27:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:42,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 06:27:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:42,967 INFO L225 Difference]: With dead ends: 5080 [2020-12-22 06:27:42,967 INFO L226 Difference]: Without dead ends: 3309 [2020-12-22 06:27:42,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:42,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3309 states. [2020-12-22 06:27:43,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3309 to 3120. [2020-12-22 06:27:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3120 states. [2020-12-22 06:27:43,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 5634 transitions. [2020-12-22 06:27:43,238 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 5634 transitions. Word has length 70 [2020-12-22 06:27:43,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:43,239 INFO L481 AbstractCegarLoop]: Abstraction has 3120 states and 5634 transitions. [2020-12-22 06:27:43,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:43,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 5634 transitions. [2020-12-22 06:27:43,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 06:27:43,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:43,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:43,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:27:43,246 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:43,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:43,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1012814657, now seen corresponding path program 1 times [2020-12-22 06:27:43,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:43,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257854151] [2020-12-22 06:27:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:43,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257854151] [2020-12-22 06:27:43,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:43,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:43,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020353133] [2020-12-22 06:27:43,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:43,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:43,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:43,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:43,341 INFO L87 Difference]: Start difference. First operand 3120 states and 5634 transitions. Second operand 3 states. [2020-12-22 06:27:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:43,692 INFO L93 Difference]: Finished difference Result 8450 states and 15283 transitions. [2020-12-22 06:27:43,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:43,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-22 06:27:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:43,724 INFO L225 Difference]: With dead ends: 8450 [2020-12-22 06:27:43,724 INFO L226 Difference]: Without dead ends: 5495 [2020-12-22 06:27:43,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:43,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2020-12-22 06:27:44,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 5306. [2020-12-22 06:27:44,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5306 states. [2020-12-22 06:27:44,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5306 states to 5306 states and 9595 transitions. [2020-12-22 06:27:44,121 INFO L78 Accepts]: Start accepts. Automaton has 5306 states and 9595 transitions. Word has length 71 [2020-12-22 06:27:44,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:44,122 INFO L481 AbstractCegarLoop]: Abstraction has 5306 states and 9595 transitions. [2020-12-22 06:27:44,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:44,122 INFO L276 IsEmpty]: Start isEmpty. Operand 5306 states and 9595 transitions. [2020-12-22 06:27:44,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 06:27:44,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:44,131 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:44,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:27:44,132 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:44,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:44,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1955340901, now seen corresponding path program 1 times [2020-12-22 06:27:44,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:44,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317647688] [2020-12-22 06:27:44,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 06:27:44,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317647688] [2020-12-22 06:27:44,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:44,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:27:44,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372970984] [2020-12-22 06:27:44,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:44,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:44,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:44,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:44,225 INFO L87 Difference]: Start difference. First operand 5306 states and 9595 transitions. Second operand 5 states. [2020-12-22 06:27:45,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:45,092 INFO L93 Difference]: Finished difference Result 15137 states and 27402 transitions. [2020-12-22 06:27:45,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:27:45,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 06:27:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:45,151 INFO L225 Difference]: With dead ends: 15137 [2020-12-22 06:27:45,151 INFO L226 Difference]: Without dead ends: 10078 [2020-12-22 06:27:45,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:27:45,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10078 states. [2020-12-22 06:27:45,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10078 to 5306. [2020-12-22 06:27:45,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5306 states. [2020-12-22 06:27:45,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5306 states to 5306 states and 9545 transitions. [2020-12-22 06:27:45,691 INFO L78 Accepts]: Start accepts. Automaton has 5306 states and 9545 transitions. Word has length 72 [2020-12-22 06:27:45,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:45,691 INFO L481 AbstractCegarLoop]: Abstraction has 5306 states and 9545 transitions. [2020-12-22 06:27:45,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:45,691 INFO L276 IsEmpty]: Start isEmpty. Operand 5306 states and 9545 transitions. [2020-12-22 06:27:45,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 06:27:45,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:45,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:45,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:27:45,698 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:45,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:45,698 INFO L82 PathProgramCache]: Analyzing trace with hash -998920620, now seen corresponding path program 1 times [2020-12-22 06:27:45,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:45,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320769146] [2020-12-22 06:27:45,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:45,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320769146] [2020-12-22 06:27:45,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:45,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:45,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332144762] [2020-12-22 06:27:45,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:45,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:45,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:45,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:45,766 INFO L87 Difference]: Start difference. First operand 5306 states and 9545 transitions. Second operand 3 states. [2020-12-22 06:27:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:46,523 INFO L93 Difference]: Finished difference Result 15334 states and 27630 transitions. [2020-12-22 06:27:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:46,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 06:27:46,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:46,556 INFO L225 Difference]: With dead ends: 15334 [2020-12-22 06:27:46,556 INFO L226 Difference]: Without dead ends: 10201 [2020-12-22 06:27:46,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:46,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10201 states. [2020-12-22 06:27:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10201 to 10012. [2020-12-22 06:27:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10012 states. [2020-12-22 06:27:47,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10012 states to 10012 states and 18026 transitions. [2020-12-22 06:27:47,292 INFO L78 Accepts]: Start accepts. Automaton has 10012 states and 18026 transitions. Word has length 72 [2020-12-22 06:27:47,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:47,292 INFO L481 AbstractCegarLoop]: Abstraction has 10012 states and 18026 transitions. [2020-12-22 06:27:47,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:47,292 INFO L276 IsEmpty]: Start isEmpty. Operand 10012 states and 18026 transitions. [2020-12-22 06:27:47,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 06:27:47,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:47,302 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:47,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:27:47,302 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:47,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:47,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1568381280, now seen corresponding path program 1 times [2020-12-22 06:27:47,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:47,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127596565] [2020-12-22 06:27:47,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:47,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127596565] [2020-12-22 06:27:47,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:47,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:27:47,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993773091] [2020-12-22 06:27:47,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:27:47,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:47,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:27:47,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:27:47,382 INFO L87 Difference]: Start difference. First operand 10012 states and 18026 transitions. Second operand 4 states. [2020-12-22 06:27:48,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:48,014 INFO L93 Difference]: Finished difference Result 10142 states and 18238 transitions. [2020-12-22 06:27:48,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:27:48,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 06:27:48,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:48,050 INFO L225 Difference]: With dead ends: 10142 [2020-12-22 06:27:48,050 INFO L226 Difference]: Without dead ends: 10012 [2020-12-22 06:27:48,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10012 states. [2020-12-22 06:27:48,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10012 to 10012. [2020-12-22 06:27:48,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10012 states. [2020-12-22 06:27:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10012 states to 10012 states and 18024 transitions. [2020-12-22 06:27:48,769 INFO L78 Accepts]: Start accepts. Automaton has 10012 states and 18024 transitions. Word has length 73 [2020-12-22 06:27:48,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:48,769 INFO L481 AbstractCegarLoop]: Abstraction has 10012 states and 18024 transitions. [2020-12-22 06:27:48,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:27:48,769 INFO L276 IsEmpty]: Start isEmpty. Operand 10012 states and 18024 transitions. [2020-12-22 06:27:48,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 06:27:48,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:48,780 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:48,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:27:48,781 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:48,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:48,781 INFO L82 PathProgramCache]: Analyzing trace with hash 239463891, now seen corresponding path program 1 times [2020-12-22 06:27:48,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:48,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018389633] [2020-12-22 06:27:48,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:48,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018389633] [2020-12-22 06:27:48,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:48,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:27:48,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162958576] [2020-12-22 06:27:48,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:48,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:48,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:48,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:48,908 INFO L87 Difference]: Start difference. First operand 10012 states and 18024 transitions. Second operand 5 states. [2020-12-22 06:27:49,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:49,832 INFO L93 Difference]: Finished difference Result 10745 states and 19208 transitions. [2020-12-22 06:27:49,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:27:49,833 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-12-22 06:27:49,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:49,868 INFO L225 Difference]: With dead ends: 10745 [2020-12-22 06:27:49,869 INFO L226 Difference]: Without dead ends: 10616 [2020-12-22 06:27:49,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:27:49,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10616 states. [2020-12-22 06:27:50,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10616 to 10125. [2020-12-22 06:27:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10125 states. [2020-12-22 06:27:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10125 states to 10125 states and 18206 transitions. [2020-12-22 06:27:50,809 INFO L78 Accepts]: Start accepts. Automaton has 10125 states and 18206 transitions. Word has length 76 [2020-12-22 06:27:50,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:50,809 INFO L481 AbstractCegarLoop]: Abstraction has 10125 states and 18206 transitions. [2020-12-22 06:27:50,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 10125 states and 18206 transitions. [2020-12-22 06:27:50,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 06:27:50,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:50,821 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:50,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:27:50,822 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:50,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:50,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1027017593, now seen corresponding path program 1 times [2020-12-22 06:27:50,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:50,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879033179] [2020-12-22 06:27:50,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:50,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879033179] [2020-12-22 06:27:50,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:50,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 06:27:50,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799116373] [2020-12-22 06:27:50,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:27:50,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:50,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:27:50,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:27:50,971 INFO L87 Difference]: Start difference. First operand 10125 states and 18206 transitions. Second operand 9 states. [2020-12-22 06:27:51,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:51,783 INFO L93 Difference]: Finished difference Result 10480 states and 18778 transitions. [2020-12-22 06:27:51,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 06:27:51,784 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-12-22 06:27:51,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:51,821 INFO L225 Difference]: With dead ends: 10480 [2020-12-22 06:27:51,821 INFO L226 Difference]: Without dead ends: 10241 [2020-12-22 06:27:51,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-12-22 06:27:51,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10241 states. [2020-12-22 06:27:52,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10241 to 10105. [2020-12-22 06:27:52,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10105 states. [2020-12-22 06:27:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10105 states to 10105 states and 18169 transitions. [2020-12-22 06:27:52,633 INFO L78 Accepts]: Start accepts. Automaton has 10105 states and 18169 transitions. Word has length 77 [2020-12-22 06:27:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:52,633 INFO L481 AbstractCegarLoop]: Abstraction has 10105 states and 18169 transitions. [2020-12-22 06:27:52,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:27:52,633 INFO L276 IsEmpty]: Start isEmpty. Operand 10105 states and 18169 transitions. [2020-12-22 06:27:52,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 06:27:52,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:52,649 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:52,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:27:52,650 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:52,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:52,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1028265088, now seen corresponding path program 1 times [2020-12-22 06:27:52,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:52,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854615738] [2020-12-22 06:27:52,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:52,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854615738] [2020-12-22 06:27:52,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:52,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:27:52,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777792153] [2020-12-22 06:27:52,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:52,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:52,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:52,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:52,782 INFO L87 Difference]: Start difference. First operand 10105 states and 18169 transitions. Second operand 5 states. [2020-12-22 06:27:53,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:53,638 INFO L93 Difference]: Finished difference Result 11115 states and 19749 transitions. [2020-12-22 06:27:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:27:53,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-12-22 06:27:53,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:53,671 INFO L225 Difference]: With dead ends: 11115 [2020-12-22 06:27:53,671 INFO L226 Difference]: Without dead ends: 10868 [2020-12-22 06:27:53,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:27:53,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10868 states. [2020-12-22 06:27:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10868 to 10301. [2020-12-22 06:27:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10301 states. [2020-12-22 06:27:54,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10301 states to 10301 states and 18477 transitions. [2020-12-22 06:27:54,349 INFO L78 Accepts]: Start accepts. Automaton has 10301 states and 18477 transitions. Word has length 89 [2020-12-22 06:27:54,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:54,349 INFO L481 AbstractCegarLoop]: Abstraction has 10301 states and 18477 transitions. [2020-12-22 06:27:54,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:54,350 INFO L276 IsEmpty]: Start isEmpty. Operand 10301 states and 18477 transitions. [2020-12-22 06:27:54,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 06:27:54,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:54,369 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:54,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:27:54,369 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:54,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:54,370 INFO L82 PathProgramCache]: Analyzing trace with hash -365040217, now seen corresponding path program 1 times [2020-12-22 06:27:54,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:54,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657273398] [2020-12-22 06:27:54,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:54,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657273398] [2020-12-22 06:27:54,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:54,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 06:27:54,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834794095] [2020-12-22 06:27:54,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:27:54,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:54,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:27:54,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:27:54,503 INFO L87 Difference]: Start difference. First operand 10301 states and 18477 transitions. Second operand 9 states. [2020-12-22 06:27:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:55,449 INFO L93 Difference]: Finished difference Result 10809 states and 19280 transitions. [2020-12-22 06:27:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 06:27:55,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 90 [2020-12-22 06:27:55,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:55,484 INFO L225 Difference]: With dead ends: 10809 [2020-12-22 06:27:55,484 INFO L226 Difference]: Without dead ends: 10380 [2020-12-22 06:27:55,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-12-22 06:27:55,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10380 states. [2020-12-22 06:27:56,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10380 to 10192. [2020-12-22 06:27:56,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10192 states. [2020-12-22 06:27:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10192 states to 10192 states and 18297 transitions. [2020-12-22 06:27:56,255 INFO L78 Accepts]: Start accepts. Automaton has 10192 states and 18297 transitions. Word has length 90 [2020-12-22 06:27:56,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:56,256 INFO L481 AbstractCegarLoop]: Abstraction has 10192 states and 18297 transitions. [2020-12-22 06:27:56,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:27:56,256 INFO L276 IsEmpty]: Start isEmpty. Operand 10192 states and 18297 transitions. [2020-12-22 06:27:56,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 06:27:56,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:56,271 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:56,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:27:56,272 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:56,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:56,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2043271433, now seen corresponding path program 1 times [2020-12-22 06:27:56,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:56,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126861421] [2020-12-22 06:27:56,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:56,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126861421] [2020-12-22 06:27:56,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:56,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 06:27:56,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476844236] [2020-12-22 06:27:56,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 06:27:56,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:56,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 06:27:56,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 06:27:56,460 INFO L87 Difference]: Start difference. First operand 10192 states and 18297 transitions. Second operand 10 states. [2020-12-22 06:27:58,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:58,526 INFO L93 Difference]: Finished difference Result 13186 states and 22894 transitions. [2020-12-22 06:27:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 06:27:58,527 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-12-22 06:27:58,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:58,565 INFO L225 Difference]: With dead ends: 13186 [2020-12-22 06:27:58,565 INFO L226 Difference]: Without dead ends: 12946 [2020-12-22 06:27:58,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=923, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 06:27:58,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12946 states. [2020-12-22 06:27:59,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12946 to 10372. [2020-12-22 06:27:59,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10372 states. [2020-12-22 06:27:59,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10372 states to 10372 states and 18569 transitions. [2020-12-22 06:27:59,356 INFO L78 Accepts]: Start accepts. Automaton has 10372 states and 18569 transitions. Word has length 92 [2020-12-22 06:27:59,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:59,356 INFO L481 AbstractCegarLoop]: Abstraction has 10372 states and 18569 transitions. [2020-12-22 06:27:59,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 06:27:59,356 INFO L276 IsEmpty]: Start isEmpty. Operand 10372 states and 18569 transitions. [2020-12-22 06:27:59,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 06:27:59,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:59,372 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:59,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:27:59,372 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:59,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:59,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1958149893, now seen corresponding path program 1 times [2020-12-22 06:27:59,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:59,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69198795] [2020-12-22 06:27:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:59,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69198795] [2020-12-22 06:27:59,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:59,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 06:27:59,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284558275] [2020-12-22 06:27:59,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:27:59,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:59,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:27:59,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:27:59,505 INFO L87 Difference]: Start difference. First operand 10372 states and 18569 transitions. Second operand 9 states. [2020-12-22 06:28:01,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:01,495 INFO L93 Difference]: Finished difference Result 13708 states and 23681 transitions. [2020-12-22 06:28:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 06:28:01,496 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 06:28:01,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:01,524 INFO L225 Difference]: With dead ends: 13708 [2020-12-22 06:28:01,524 INFO L226 Difference]: Without dead ends: 13349 [2020-12-22 06:28:01,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=750, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 06:28:01,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13349 states. [2020-12-22 06:28:02,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13349 to 10690. [2020-12-22 06:28:02,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10690 states. [2020-12-22 06:28:02,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10690 states to 10690 states and 19057 transitions. [2020-12-22 06:28:02,057 INFO L78 Accepts]: Start accepts. Automaton has 10690 states and 19057 transitions. Word has length 93 [2020-12-22 06:28:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:02,058 INFO L481 AbstractCegarLoop]: Abstraction has 10690 states and 19057 transitions. [2020-12-22 06:28:02,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:28:02,058 INFO L276 IsEmpty]: Start isEmpty. Operand 10690 states and 19057 transitions. [2020-12-22 06:28:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 06:28:02,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:02,073 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:02,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 06:28:02,073 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:02,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:02,074 INFO L82 PathProgramCache]: Analyzing trace with hash 643785745, now seen corresponding path program 1 times [2020-12-22 06:28:02,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:02,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562567924] [2020-12-22 06:28:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:28:02,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562567924] [2020-12-22 06:28:02,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:02,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:28:02,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878992459] [2020-12-22 06:28:02,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:28:02,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:02,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:28:02,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:28:02,169 INFO L87 Difference]: Start difference. First operand 10690 states and 19057 transitions. Second operand 5 states. [2020-12-22 06:28:03,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:03,896 INFO L93 Difference]: Finished difference Result 22950 states and 40466 transitions. [2020-12-22 06:28:03,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:28:03,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-12-22 06:28:03,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:03,947 INFO L225 Difference]: With dead ends: 22950 [2020-12-22 06:28:03,948 INFO L226 Difference]: Without dead ends: 22427 [2020-12-22 06:28:03,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:28:03,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22427 states. [2020-12-22 06:28:04,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22427 to 21108. [2020-12-22 06:28:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21108 states. [2020-12-22 06:28:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21108 states to 21108 states and 37644 transitions. [2020-12-22 06:28:05,029 INFO L78 Accepts]: Start accepts. Automaton has 21108 states and 37644 transitions. Word has length 93 [2020-12-22 06:28:05,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:05,029 INFO L481 AbstractCegarLoop]: Abstraction has 21108 states and 37644 transitions. [2020-12-22 06:28:05,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:28:05,029 INFO L276 IsEmpty]: Start isEmpty. Operand 21108 states and 37644 transitions. [2020-12-22 06:28:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 06:28:05,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:05,050 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:05,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 06:28:05,050 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:05,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:05,050 INFO L82 PathProgramCache]: Analyzing trace with hash 731777897, now seen corresponding path program 1 times [2020-12-22 06:28:05,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:05,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258074751] [2020-12-22 06:28:05,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:28:05,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258074751] [2020-12-22 06:28:05,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:05,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:28:05,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822862169] [2020-12-22 06:28:05,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:28:05,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:05,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:28:05,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:28:05,149 INFO L87 Difference]: Start difference. First operand 21108 states and 37644 transitions. Second operand 7 states. [2020-12-22 06:28:06,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:06,649 INFO L93 Difference]: Finished difference Result 23384 states and 41125 transitions. [2020-12-22 06:28:06,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 06:28:06,649 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-12-22 06:28:06,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:06,688 INFO L225 Difference]: With dead ends: 23384 [2020-12-22 06:28:06,689 INFO L226 Difference]: Without dead ends: 21869 [2020-12-22 06:28:06,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-12-22 06:28:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21869 states. [2020-12-22 06:28:07,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21869 to 21018. [2020-12-22 06:28:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21018 states. [2020-12-22 06:28:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21018 states to 21018 states and 37500 transitions. [2020-12-22 06:28:07,886 INFO L78 Accepts]: Start accepts. Automaton has 21018 states and 37500 transitions. Word has length 93 [2020-12-22 06:28:07,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:07,886 INFO L481 AbstractCegarLoop]: Abstraction has 21018 states and 37500 transitions. [2020-12-22 06:28:07,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:28:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 21018 states and 37500 transitions. [2020-12-22 06:28:07,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 06:28:07,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:07,907 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:07,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 06:28:07,907 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:07,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:07,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1162388372, now seen corresponding path program 1 times [2020-12-22 06:28:07,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:07,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51984340] [2020-12-22 06:28:07,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:28:08,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51984340] [2020-12-22 06:28:08,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:08,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:28:08,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297286876] [2020-12-22 06:28:08,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:28:08,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:08,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:28:08,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:28:08,113 INFO L87 Difference]: Start difference. First operand 21018 states and 37500 transitions. Second operand 4 states. [2020-12-22 06:28:10,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:10,472 INFO L93 Difference]: Finished difference Result 44345 states and 78514 transitions. [2020-12-22 06:28:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:28:10,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 06:28:10,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:10,533 INFO L225 Difference]: With dead ends: 44345 [2020-12-22 06:28:10,533 INFO L226 Difference]: Without dead ends: 43350 [2020-12-22 06:28:10,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:28:10,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43350 states. [2020-12-22 06:28:12,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43350 to 41756. [2020-12-22 06:28:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41756 states. [2020-12-22 06:28:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41756 states to 41756 states and 74534 transitions. [2020-12-22 06:28:12,545 INFO L78 Accepts]: Start accepts. Automaton has 41756 states and 74534 transitions. Word has length 94 [2020-12-22 06:28:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:12,545 INFO L481 AbstractCegarLoop]: Abstraction has 41756 states and 74534 transitions. [2020-12-22 06:28:12,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:28:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 41756 states and 74534 transitions. [2020-12-22 06:28:12,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 06:28:12,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:12,591 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:12,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 06:28:12,591 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:12,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:12,592 INFO L82 PathProgramCache]: Analyzing trace with hash 972332284, now seen corresponding path program 1 times [2020-12-22 06:28:12,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:12,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835463037] [2020-12-22 06:28:12,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:28:12,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835463037] [2020-12-22 06:28:12,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:12,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:28:12,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546217754] [2020-12-22 06:28:12,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:28:12,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:12,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:28:12,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:28:12,651 INFO L87 Difference]: Start difference. First operand 41756 states and 74534 transitions. Second operand 4 states. [2020-12-22 06:28:14,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:14,660 INFO L93 Difference]: Finished difference Result 43338 states and 76956 transitions. [2020-12-22 06:28:14,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:28:14,660 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-12-22 06:28:14,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:14,719 INFO L225 Difference]: With dead ends: 43338 [2020-12-22 06:28:14,720 INFO L226 Difference]: Without dead ends: 41343 [2020-12-22 06:28:14,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:28:14,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41343 states. [2020-12-22 06:28:16,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41343 to 40626. [2020-12-22 06:28:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40626 states. [2020-12-22 06:28:16,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40626 states to 40626 states and 72776 transitions. [2020-12-22 06:28:16,520 INFO L78 Accepts]: Start accepts. Automaton has 40626 states and 72776 transitions. Word has length 95 [2020-12-22 06:28:16,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:16,520 INFO L481 AbstractCegarLoop]: Abstraction has 40626 states and 72776 transitions. [2020-12-22 06:28:16,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:28:16,520 INFO L276 IsEmpty]: Start isEmpty. Operand 40626 states and 72776 transitions. [2020-12-22 06:28:16,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 06:28:16,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:16,583 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:16,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 06:28:16,583 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:16,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:16,583 INFO L82 PathProgramCache]: Analyzing trace with hash 874785487, now seen corresponding path program 1 times [2020-12-22 06:28:16,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:16,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411427139] [2020-12-22 06:28:16,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 06:28:16,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411427139] [2020-12-22 06:28:16,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:16,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:28:16,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660872626] [2020-12-22 06:28:16,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:28:16,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:16,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:28:16,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:28:16,664 INFO L87 Difference]: Start difference. First operand 40626 states and 72776 transitions. Second operand 5 states. [2020-12-22 06:28:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:20,576 INFO L93 Difference]: Finished difference Result 115236 states and 205855 transitions. [2020-12-22 06:28:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:28:20,576 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 103 [2020-12-22 06:28:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:20,699 INFO L225 Difference]: With dead ends: 115236 [2020-12-22 06:28:20,699 INFO L226 Difference]: Without dead ends: 74969 [2020-12-22 06:28:20,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:28:20,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74969 states. [2020-12-22 06:28:23,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74969 to 40626. [2020-12-22 06:28:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40626 states. [2020-12-22 06:28:23,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40626 states to 40626 states and 72647 transitions. [2020-12-22 06:28:23,280 INFO L78 Accepts]: Start accepts. Automaton has 40626 states and 72647 transitions. Word has length 103 [2020-12-22 06:28:23,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:23,281 INFO L481 AbstractCegarLoop]: Abstraction has 40626 states and 72647 transitions. [2020-12-22 06:28:23,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:28:23,281 INFO L276 IsEmpty]: Start isEmpty. Operand 40626 states and 72647 transitions. [2020-12-22 06:28:23,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 06:28:23,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:23,331 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:23,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 06:28:23,331 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:23,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:23,332 INFO L82 PathProgramCache]: Analyzing trace with hash 988316123, now seen corresponding path program 1 times [2020-12-22 06:28:23,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:23,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268707423] [2020-12-22 06:28:23,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 06:28:23,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268707423] [2020-12-22 06:28:23,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:23,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:28:23,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715004221] [2020-12-22 06:28:23,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:28:23,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:23,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:28:23,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:28:23,423 INFO L87 Difference]: Start difference. First operand 40626 states and 72647 transitions. Second operand 5 states. [2020-12-22 06:28:31,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:31,457 INFO L93 Difference]: Finished difference Result 197310 states and 352039 transitions. [2020-12-22 06:28:31,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:28:31,457 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2020-12-22 06:28:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:31,939 INFO L225 Difference]: With dead ends: 197310 [2020-12-22 06:28:31,939 INFO L226 Difference]: Without dead ends: 156805 [2020-12-22 06:28:31,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:28:32,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156805 states. [2020-12-22 06:28:37,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156805 to 82783. [2020-12-22 06:28:37,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82783 states. [2020-12-22 06:28:37,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82783 states to 82783 states and 145731 transitions. [2020-12-22 06:28:37,384 INFO L78 Accepts]: Start accepts. Automaton has 82783 states and 145731 transitions. Word has length 104 [2020-12-22 06:28:37,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:37,384 INFO L481 AbstractCegarLoop]: Abstraction has 82783 states and 145731 transitions. [2020-12-22 06:28:37,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:28:37,384 INFO L276 IsEmpty]: Start isEmpty. Operand 82783 states and 145731 transitions. [2020-12-22 06:28:37,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 06:28:37,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:37,465 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:37,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 06:28:37,465 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:37,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:37,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1380095325, now seen corresponding path program 1 times [2020-12-22 06:28:37,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:37,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865666955] [2020-12-22 06:28:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 06:28:37,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865666955] [2020-12-22 06:28:37,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:37,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:28:37,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175676405] [2020-12-22 06:28:37,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:28:37,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:37,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:28:37,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:28:37,553 INFO L87 Difference]: Start difference. First operand 82783 states and 145731 transitions. Second operand 5 states. [2020-12-22 06:28:52,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:52,872 INFO L93 Difference]: Finished difference Result 394134 states and 695965 transitions. [2020-12-22 06:28:52,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:28:52,873 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2020-12-22 06:28:52,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:53,913 INFO L225 Difference]: With dead ends: 394134 [2020-12-22 06:28:53,914 INFO L226 Difference]: Without dead ends: 311773 [2020-12-22 06:28:54,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:28:54,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311773 states. [2020-12-22 06:29:04,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311773 to 163202. [2020-12-22 06:29:04,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163202 states. [2020-12-22 06:29:04,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163202 states to 163202 states and 287797 transitions. [2020-12-22 06:29:04,700 INFO L78 Accepts]: Start accepts. Automaton has 163202 states and 287797 transitions. Word has length 104 [2020-12-22 06:29:04,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:04,701 INFO L481 AbstractCegarLoop]: Abstraction has 163202 states and 287797 transitions. [2020-12-22 06:29:04,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:29:04,701 INFO L276 IsEmpty]: Start isEmpty. Operand 163202 states and 287797 transitions. [2020-12-22 06:29:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 06:29:04,870 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:04,870 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:29:04,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 06:29:04,870 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:04,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:04,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1283740522, now seen corresponding path program 1 times [2020-12-22 06:29:04,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:04,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217027799] [2020-12-22 06:29:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 06:29:04,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217027799] [2020-12-22 06:29:04,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:04,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:29:04,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330128391] [2020-12-22 06:29:04,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:29:04,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:04,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:29:04,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:29:04,970 INFO L87 Difference]: Start difference. First operand 163202 states and 287797 transitions. Second operand 4 states. [2020-12-22 06:29:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:20,298 INFO L93 Difference]: Finished difference Result 455226 states and 804459 transitions. [2020-12-22 06:29:20,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:29:20,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-22 06:29:20,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:21,257 INFO L225 Difference]: With dead ends: 455226 [2020-12-22 06:29:21,258 INFO L226 Difference]: Without dead ends: 292886 [2020-12-22 06:29:21,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:29:21,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292886 states. [2020-12-22 06:29:31,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292886 to 161663. [2020-12-22 06:29:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161663 states. [2020-12-22 06:29:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161663 states to 161663 states and 284975 transitions. [2020-12-22 06:29:32,330 INFO L78 Accepts]: Start accepts. Automaton has 161663 states and 284975 transitions. Word has length 105 [2020-12-22 06:29:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:32,330 INFO L481 AbstractCegarLoop]: Abstraction has 161663 states and 284975 transitions. [2020-12-22 06:29:32,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:29:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 161663 states and 284975 transitions. [2020-12-22 06:29:32,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 06:29:32,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:32,849 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:29:32,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 06:29:32,849 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:32,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:32,850 INFO L82 PathProgramCache]: Analyzing trace with hash -221437674, now seen corresponding path program 1 times [2020-12-22 06:29:32,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:32,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762422207] [2020-12-22 06:29:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 06:29:32,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762422207] [2020-12-22 06:29:32,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:32,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:29:32,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500675179] [2020-12-22 06:29:32,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:29:32,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:32,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:29:32,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:29:32,938 INFO L87 Difference]: Start difference. First operand 161663 states and 284975 transitions. Second operand 4 states. [2020-12-22 06:29:49,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:49,620 INFO L93 Difference]: Finished difference Result 436609 states and 760735 transitions. [2020-12-22 06:29:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:29:49,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-12-22 06:29:49,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:50,475 INFO L225 Difference]: With dead ends: 436609 [2020-12-22 06:29:50,475 INFO L226 Difference]: Without dead ends: 275618 [2020-12-22 06:29:50,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:29:50,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275618 states.