/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:57:08,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:57:08,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:57:08,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 17:57:08,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 17:57:08,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 17:57:08,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 17:57:08,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 17:57:08,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 17:57:08,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 17:57:08,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 17:57:08,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 17:57:08,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:57:08,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:57:08,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:57:08,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:57:08,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:57:08,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:57:08,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:57:08,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:57:08,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:57:08,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:57:08,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:57:08,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:57:08,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 17:57:08,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 17:57:08,388 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 17:57:08,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 17:57:08,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 17:57:08,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 17:57:08,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 17:57:08,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 17:57:08,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 17:57:08,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 17:57:08,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 17:57:08,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 17:57:08,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 17:57:08,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 17:57:08,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:57:08,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:57:08,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:57:08,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 17:57:08,422 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:57:08,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:57:08,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:57:08,428 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:57:08,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:57:08,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:57:08,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:57:08,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:57:08,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:57:08,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:57:08,431 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:57:08,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:57:08,432 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:57:08,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:57:08,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:57:08,433 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:57:08,433 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:57:08,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:57:08,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:57:08,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:57:08,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:57:08,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:57:08,435 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:57:08,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:57:08,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:57:08,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:57:08,913 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:57:08,914 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:57:08,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2021-02-23 17:57:09,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61cecafa5/7bd722778cf84e9da1772b16c228675c/FLAG8df3fb6f6 [2021-02-23 17:57:09,638 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:57:09,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2021-02-23 17:57:09,646 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61cecafa5/7bd722778cf84e9da1772b16c228675c/FLAG8df3fb6f6 [2021-02-23 17:57:09,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61cecafa5/7bd722778cf84e9da1772b16c228675c [2021-02-23 17:57:10,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:57:10,017 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:57:10,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:57:10,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:57:10,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:57:10,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:57:10" (1/1) ... [2021-02-23 17:57:10,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74dd884c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:10, skipping insertion in model container [2021-02-23 17:57:10,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:57:10" (1/1) ... [2021-02-23 17:57:10,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:57:10,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:57:10,211 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_15x0-2.c[481,494] [2021-02-23 17:57:10,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:57:10,226 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:57:10,243 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_15x0-2.c[481,494] [2021-02-23 17:57:10,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:57:10,260 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:57:10,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:10 WrapperNode [2021-02-23 17:57:10,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:57:10,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:57:10,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:57:10,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:57:10,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:10" (1/1) ... [2021-02-23 17:57:10,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:10" (1/1) ... [2021-02-23 17:57:10,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:10" (1/1) ... [2021-02-23 17:57:10,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:10" (1/1) ... [2021-02-23 17:57:10,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:10" (1/1) ... [2021-02-23 17:57:10,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:10" (1/1) ... [2021-02-23 17:57:10,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:10" (1/1) ... [2021-02-23 17:57:10,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:57:10,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:57:10,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:57:10,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:57:10,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:10" (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 [2021-02-23 17:57:10,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:57:10,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:57:10,408 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:57:10,408 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-02-23 17:57:10,408 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:57:10,408 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:57:10,408 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:57:10,409 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:57:10,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:57:10,409 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-02-23 17:57:10,409 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:57:10,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:57:10,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:57:10,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:57:10,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:57:10,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:57:10,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:57:10,744 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:57:10,744 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 17:57:10,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:57:10 BoogieIcfgContainer [2021-02-23 17:57:10,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:57:10,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:57:10,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:57:10,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:57:10,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:57:10" (1/3) ... [2021-02-23 17:57:10,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2155b96d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:57:10, skipping insertion in model container [2021-02-23 17:57:10,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:10" (2/3) ... [2021-02-23 17:57:10,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2155b96d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:57:10, skipping insertion in model container [2021-02-23 17:57:10,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:57:10" (3/3) ... [2021-02-23 17:57:10,756 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_15x0-2.c [2021-02-23 17:57:10,765 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:57:10,771 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:57:10,797 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:57:10,834 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:57:10,834 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:57:10,834 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:57:10,835 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:57:10,835 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:57:10,835 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:57:10,835 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:57:10,835 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:57:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2021-02-23 17:57:10,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 17:57:10,885 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:10,886 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] [2021-02-23 17:57:10,891 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:10,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:10,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1485133070, now seen corresponding path program 1 times [2021-02-23 17:57:10,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:10,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546689946] [2021-02-23 17:57:10,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:11,050 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:11,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:11,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:11,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:11,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:11,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:11,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:11,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:11,489 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:11,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:11,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:11,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:11,538 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:11,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:11,566 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:11,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:11,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:57:11,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546689946] [2021-02-23 17:57:11,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:11,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 17:57:11,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254890217] [2021-02-23 17:57:11,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 17:57:11,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:11,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 17:57:11,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-23 17:57:11,652 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 7 states. [2021-02-23 17:57:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:11,988 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-02-23 17:57:11,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 17:57:11,990 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-02-23 17:57:11,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:12,001 INFO L225 Difference]: With dead ends: 48 [2021-02-23 17:57:12,001 INFO L226 Difference]: Without dead ends: 33 [2021-02-23 17:57:12,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-23 17:57:12,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-23 17:57:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-02-23 17:57:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-23 17:57:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-02-23 17:57:12,057 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2021-02-23 17:57:12,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:12,058 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-02-23 17:57:12,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 17:57:12,058 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-02-23 17:57:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-23 17:57:12,061 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:12,061 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:12,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:57:12,062 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:12,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:12,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1822905144, now seen corresponding path program 1 times [2021-02-23 17:57:12,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:12,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768094124] [2021-02-23 17:57:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:12,066 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:12,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:12,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:12,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:12,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:12,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:12,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:12,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:12,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:12,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:12,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,258 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:12,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:12,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-23 17:57:12,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768094124] [2021-02-23 17:57:12,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:12,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 17:57:12,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209652140] [2021-02-23 17:57:12,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 17:57:12,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:12,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 17:57:12,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-23 17:57:12,292 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2021-02-23 17:57:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:12,575 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-02-23 17:57:12,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 17:57:12,576 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2021-02-23 17:57:12,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:12,578 INFO L225 Difference]: With dead ends: 44 [2021-02-23 17:57:12,578 INFO L226 Difference]: Without dead ends: 38 [2021-02-23 17:57:12,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-23 17:57:12,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-23 17:57:12,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-02-23 17:57:12,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-23 17:57:12,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-02-23 17:57:12,595 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2021-02-23 17:57:12,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:12,596 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-02-23 17:57:12,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 17:57:12,596 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-02-23 17:57:12,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 17:57:12,598 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:12,598 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-02-23 17:57:12,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:57:12,599 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:12,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:12,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1004193542, now seen corresponding path program 2 times [2021-02-23 17:57:12,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:12,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816782515] [2021-02-23 17:57:12,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:12,603 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:12,641 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:12,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:12,647 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:12,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:12,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:12,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:12,717 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:12,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:12,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:12,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:12,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:12,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:12,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:12,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:12,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:12,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-02-23 17:57:12,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816782515] [2021-02-23 17:57:12,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:12,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 17:57:12,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155772135] [2021-02-23 17:57:12,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 17:57:12,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:12,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 17:57:12,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:57:12,793 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 9 states. [2021-02-23 17:57:13,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:13,076 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-02-23 17:57:13,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 17:57:13,076 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2021-02-23 17:57:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:13,078 INFO L225 Difference]: With dead ends: 49 [2021-02-23 17:57:13,078 INFO L226 Difference]: Without dead ends: 43 [2021-02-23 17:57:13,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-23 17:57:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-23 17:57:13,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-02-23 17:57:13,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-23 17:57:13,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-02-23 17:57:13,093 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 44 [2021-02-23 17:57:13,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:13,093 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-02-23 17:57:13,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 17:57:13,094 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-02-23 17:57:13,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-23 17:57:13,095 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:13,096 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:13,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 17:57:13,096 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:13,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:13,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1655724848, now seen corresponding path program 3 times [2021-02-23 17:57:13,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:13,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893460470] [2021-02-23 17:57:13,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:13,100 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:13,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:13,147 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,148 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:13,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:13,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:13,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:13,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:13,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,280 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:13,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,302 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:13,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:13,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-02-23 17:57:13,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893460470] [2021-02-23 17:57:13,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:13,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 17:57:13,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505698100] [2021-02-23 17:57:13,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 17:57:13,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:13,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 17:57:13,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-23 17:57:13,358 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 10 states. [2021-02-23 17:57:13,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:13,724 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-02-23 17:57:13,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 17:57:13,725 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2021-02-23 17:57:13,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:13,727 INFO L225 Difference]: With dead ends: 54 [2021-02-23 17:57:13,727 INFO L226 Difference]: Without dead ends: 48 [2021-02-23 17:57:13,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-02-23 17:57:13,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-23 17:57:13,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-02-23 17:57:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-23 17:57:13,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-02-23 17:57:13,742 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 53 [2021-02-23 17:57:13,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:13,743 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-02-23 17:57:13,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 17:57:13,743 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-02-23 17:57:13,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-23 17:57:13,744 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:13,745 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:13,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 17:57:13,745 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:13,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:13,746 INFO L82 PathProgramCache]: Analyzing trace with hash 54098690, now seen corresponding path program 4 times [2021-02-23 17:57:13,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:13,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461239055] [2021-02-23 17:57:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:13,749 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:13,776 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,776 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:13,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:13,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:13,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:13,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:13,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:13,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,864 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:13,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:13,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,905 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,906 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:13,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,930 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,934 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:13,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:13,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-02-23 17:57:13,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461239055] [2021-02-23 17:57:13,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:13,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 17:57:13,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032621327] [2021-02-23 17:57:13,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 17:57:13,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:13,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 17:57:13,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-02-23 17:57:13,980 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 11 states. [2021-02-23 17:57:14,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:14,446 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-02-23 17:57:14,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 17:57:14,446 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2021-02-23 17:57:14,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:14,448 INFO L225 Difference]: With dead ends: 59 [2021-02-23 17:57:14,448 INFO L226 Difference]: Without dead ends: 53 [2021-02-23 17:57:14,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-02-23 17:57:14,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-23 17:57:14,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-02-23 17:57:14,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-23 17:57:14,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-02-23 17:57:14,464 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 62 [2021-02-23 17:57:14,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:14,464 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-02-23 17:57:14,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 17:57:14,464 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-02-23 17:57:14,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-23 17:57:14,466 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:14,466 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:14,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 17:57:14,466 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:14,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:14,467 INFO L82 PathProgramCache]: Analyzing trace with hash -406982872, now seen corresponding path program 5 times [2021-02-23 17:57:14,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:14,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615144054] [2021-02-23 17:57:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:14,470 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:14,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,506 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:14,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:14,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:14,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:14,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:14,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:14,561 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,562 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:14,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:14,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:14,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,598 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:14,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:14,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:14,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:14,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:14,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:14,644 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:14,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:14,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:14,664 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,665 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:14,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:14,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:14,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:14,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:14,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-02-23 17:57:14,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615144054] [2021-02-23 17:57:14,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:14,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-23 17:57:14,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176209572] [2021-02-23 17:57:14,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 17:57:14,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:14,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 17:57:14,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-02-23 17:57:14,743 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 12 states. [2021-02-23 17:57:15,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:15,268 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-02-23 17:57:15,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 17:57:15,270 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2021-02-23 17:57:15,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:15,272 INFO L225 Difference]: With dead ends: 64 [2021-02-23 17:57:15,272 INFO L226 Difference]: Without dead ends: 58 [2021-02-23 17:57:15,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-02-23 17:57:15,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-23 17:57:15,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-02-23 17:57:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-23 17:57:15,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-02-23 17:57:15,291 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 71 [2021-02-23 17:57:15,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:15,292 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-02-23 17:57:15,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 17:57:15,292 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-02-23 17:57:15,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-02-23 17:57:15,294 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:15,294 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:15,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 17:57:15,295 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:15,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:15,295 INFO L82 PathProgramCache]: Analyzing trace with hash 507179274, now seen corresponding path program 6 times [2021-02-23 17:57:15,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:15,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161999900] [2021-02-23 17:57:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:15,298 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:15,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:15,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,337 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:15,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:15,367 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:15,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:15,390 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,391 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:15,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,440 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:15,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,465 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,467 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:15,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,489 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:15,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:15,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:15,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:15,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-02-23 17:57:15,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161999900] [2021-02-23 17:57:15,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:15,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-23 17:57:15,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376371269] [2021-02-23 17:57:15,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 17:57:15,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:15,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 17:57:15,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-02-23 17:57:15,611 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 13 states. [2021-02-23 17:57:16,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:16,078 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-02-23 17:57:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 17:57:16,078 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2021-02-23 17:57:16,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:16,080 INFO L225 Difference]: With dead ends: 69 [2021-02-23 17:57:16,080 INFO L226 Difference]: Without dead ends: 63 [2021-02-23 17:57:16,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-02-23 17:57:16,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-02-23 17:57:16,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-02-23 17:57:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-23 17:57:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-02-23 17:57:16,097 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 80 [2021-02-23 17:57:16,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:16,098 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-02-23 17:57:16,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 17:57:16,098 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-02-23 17:57:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-23 17:57:16,100 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:16,100 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:16,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 17:57:16,101 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:16,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:16,101 INFO L82 PathProgramCache]: Analyzing trace with hash -326332640, now seen corresponding path program 7 times [2021-02-23 17:57:16,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:16,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868523159] [2021-02-23 17:57:16,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:16,104 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:16,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:16,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:16,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,288 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,289 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,362 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:16,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-02-23 17:57:16,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868523159] [2021-02-23 17:57:16,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:16,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-23 17:57:16,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560851476] [2021-02-23 17:57:16,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 17:57:16,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:16,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 17:57:16,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-02-23 17:57:16,470 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 14 states. [2021-02-23 17:57:16,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:16,987 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-02-23 17:57:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 17:57:16,987 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2021-02-23 17:57:16,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:16,995 INFO L225 Difference]: With dead ends: 74 [2021-02-23 17:57:16,995 INFO L226 Difference]: Without dead ends: 68 [2021-02-23 17:57:16,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2021-02-23 17:57:16,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-02-23 17:57:17,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-02-23 17:57:17,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-02-23 17:57:17,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-02-23 17:57:17,013 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 89 [2021-02-23 17:57:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:17,013 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-02-23 17:57:17,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 17:57:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-02-23 17:57:17,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-02-23 17:57:17,015 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:17,015 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:17,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 17:57:17,016 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:17,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:17,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1949113106, now seen corresponding path program 8 times [2021-02-23 17:57:17,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:17,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763481931] [2021-02-23 17:57:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:17,019 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:17,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,058 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,058 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:17,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:17,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,191 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,220 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,263 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:17,422 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-02-23 17:57:17,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763481931] [2021-02-23 17:57:17,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:17,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-23 17:57:17,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023016440] [2021-02-23 17:57:17,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 17:57:17,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:17,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 17:57:17,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-02-23 17:57:17,480 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 15 states. [2021-02-23 17:57:18,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:18,074 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-02-23 17:57:18,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-23 17:57:18,075 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 98 [2021-02-23 17:57:18,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:18,076 INFO L225 Difference]: With dead ends: 79 [2021-02-23 17:57:18,077 INFO L226 Difference]: Without dead ends: 73 [2021-02-23 17:57:18,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-02-23 17:57:18,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-23 17:57:18,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-02-23 17:57:18,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-02-23 17:57:18,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-02-23 17:57:18,098 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 98 [2021-02-23 17:57:18,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:18,098 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-02-23 17:57:18,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 17:57:18,099 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-02-23 17:57:18,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-02-23 17:57:18,100 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:18,100 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:18,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 17:57:18,101 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:18,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1213774616, now seen corresponding path program 9 times [2021-02-23 17:57:18,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:18,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827019960] [2021-02-23 17:57:18,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:18,104 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:18,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:18,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,180 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:18,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,280 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,305 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,306 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,335 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,449 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:18,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-02-23 17:57:18,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827019960] [2021-02-23 17:57:18,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:18,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-23 17:57:18,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148766348] [2021-02-23 17:57:18,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 17:57:18,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:18,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 17:57:18,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-02-23 17:57:18,555 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 16 states. [2021-02-23 17:57:19,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:19,147 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-02-23 17:57:19,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-23 17:57:19,148 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 107 [2021-02-23 17:57:19,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:19,149 INFO L225 Difference]: With dead ends: 84 [2021-02-23 17:57:19,149 INFO L226 Difference]: Without dead ends: 78 [2021-02-23 17:57:19,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=512, Unknown=0, NotChecked=0, Total=756 [2021-02-23 17:57:19,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-23 17:57:19,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-02-23 17:57:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-23 17:57:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-02-23 17:57:19,168 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 107 [2021-02-23 17:57:19,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:19,168 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-02-23 17:57:19,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 17:57:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-02-23 17:57:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-02-23 17:57:19,170 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:19,170 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:19,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 17:57:19,170 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:19,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:19,171 INFO L82 PathProgramCache]: Analyzing trace with hash -241993446, now seen corresponding path program 10 times [2021-02-23 17:57:19,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:19,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996235912] [2021-02-23 17:57:19,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:19,174 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:19,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:19,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:19,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,312 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,362 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,363 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,366 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,449 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,505 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,505 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,550 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,550 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,552 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:19,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-02-23 17:57:19,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996235912] [2021-02-23 17:57:19,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:19,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-23 17:57:19,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393995538] [2021-02-23 17:57:19,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 17:57:19,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:19,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 17:57:19,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-02-23 17:57:19,678 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 17 states. [2021-02-23 17:57:20,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:20,381 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2021-02-23 17:57:20,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-23 17:57:20,381 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 116 [2021-02-23 17:57:20,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:20,383 INFO L225 Difference]: With dead ends: 89 [2021-02-23 17:57:20,383 INFO L226 Difference]: Without dead ends: 83 [2021-02-23 17:57:20,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-02-23 17:57:20,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-23 17:57:20,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-02-23 17:57:20,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-02-23 17:57:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-02-23 17:57:20,419 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 116 [2021-02-23 17:57:20,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:20,421 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-02-23 17:57:20,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 17:57:20,421 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-02-23 17:57:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-02-23 17:57:20,425 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:20,425 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:20,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 17:57:20,425 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:20,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:20,426 INFO L82 PathProgramCache]: Analyzing trace with hash -790695152, now seen corresponding path program 11 times [2021-02-23 17:57:20,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:20,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064589088] [2021-02-23 17:57:20,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:20,431 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:20,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:20,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,500 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:20,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,552 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,660 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,661 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,692 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,693 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,694 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,756 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,756 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,914 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,915 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:21,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-02-23 17:57:21,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064589088] [2021-02-23 17:57:21,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:21,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-23 17:57:21,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349962951] [2021-02-23 17:57:21,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 17:57:21,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:21,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 17:57:21,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-02-23 17:57:21,139 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 18 states. [2021-02-23 17:57:21,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:21,906 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-02-23 17:57:21,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-23 17:57:21,907 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 125 [2021-02-23 17:57:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:21,909 INFO L225 Difference]: With dead ends: 94 [2021-02-23 17:57:21,909 INFO L226 Difference]: Without dead ends: 88 [2021-02-23 17:57:21,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2021-02-23 17:57:21,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-02-23 17:57:21,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-02-23 17:57:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-02-23 17:57:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-02-23 17:57:21,925 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 125 [2021-02-23 17:57:21,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:21,926 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-02-23 17:57:21,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 17:57:21,926 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-02-23 17:57:21,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-02-23 17:57:21,928 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:21,928 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:21,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 17:57:21,928 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:21,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:21,929 INFO L82 PathProgramCache]: Analyzing trace with hash -126776542, now seen corresponding path program 12 times [2021-02-23 17:57:21,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:21,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424576978] [2021-02-23 17:57:21,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:21,931 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:21,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:21,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:22,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,006 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:22,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,043 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,180 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,220 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,265 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,426 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,449 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,449 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:22,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-02-23 17:57:22,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424576978] [2021-02-23 17:57:22,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:22,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-23 17:57:22,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428611084] [2021-02-23 17:57:22,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-23 17:57:22,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:22,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-23 17:57:22,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-02-23 17:57:22,591 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 19 states. [2021-02-23 17:57:23,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:23,316 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2021-02-23 17:57:23,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-23 17:57:23,316 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 134 [2021-02-23 17:57:23,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:23,318 INFO L225 Difference]: With dead ends: 99 [2021-02-23 17:57:23,318 INFO L226 Difference]: Without dead ends: 93 [2021-02-23 17:57:23,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=752, Unknown=0, NotChecked=0, Total=1122 [2021-02-23 17:57:23,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-02-23 17:57:23,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-02-23 17:57:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-02-23 17:57:23,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-02-23 17:57:23,333 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 134 [2021-02-23 17:57:23,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:23,334 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-02-23 17:57:23,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-23 17:57:23,334 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-02-23 17:57:23,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-02-23 17:57:23,335 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:23,336 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:23,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 17:57:23,336 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:23,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1918613256, now seen corresponding path program 13 times [2021-02-23 17:57:23,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:23,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687000891] [2021-02-23 17:57:23,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:23,339 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:23,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:23,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:23,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,489 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,526 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,527 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,561 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,562 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,593 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,593 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,594 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,650 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,708 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,709 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,736 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:23,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-02-23 17:57:24,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687000891] [2021-02-23 17:57:24,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:24,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-02-23 17:57:24,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627390119] [2021-02-23 17:57:24,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-23 17:57:24,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:24,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-23 17:57:24,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-02-23 17:57:24,040 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 20 states. [2021-02-23 17:57:24,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:24,904 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2021-02-23 17:57:24,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-23 17:57:24,905 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 143 [2021-02-23 17:57:24,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:24,907 INFO L225 Difference]: With dead ends: 104 [2021-02-23 17:57:24,908 INFO L226 Difference]: Without dead ends: 98 [2021-02-23 17:57:24,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=418, Invalid=842, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 17:57:24,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-02-23 17:57:24,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-02-23 17:57:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-02-23 17:57:24,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2021-02-23 17:57:24,928 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 143 [2021-02-23 17:57:24,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:24,931 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2021-02-23 17:57:24,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-23 17:57:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2021-02-23 17:57:24,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-02-23 17:57:24,934 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:24,935 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:24,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-23 17:57:24,935 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:24,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:24,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1212862762, now seen corresponding path program 14 times [2021-02-23 17:57:24,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:24,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624855246] [2021-02-23 17:57:24,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:24,942 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:25,004 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:25,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:25,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,070 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,199 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,304 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,334 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,362 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,362 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,363 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:25,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2021-02-23 17:57:25,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624855246] [2021-02-23 17:57:25,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:25,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-02-23 17:57:25,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658730921] [2021-02-23 17:57:25,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-23 17:57:25,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:25,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-23 17:57:25,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-02-23 17:57:25,737 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 21 states. [2021-02-23 17:57:26,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:26,626 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2021-02-23 17:57:26,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-23 17:57:26,627 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 152 [2021-02-23 17:57:26,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:26,629 INFO L225 Difference]: With dead ends: 109 [2021-02-23 17:57:26,629 INFO L226 Difference]: Without dead ends: 103 [2021-02-23 17:57:26,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2021-02-23 17:57:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-02-23 17:57:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-02-23 17:57:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-02-23 17:57:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-02-23 17:57:26,645 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 152 [2021-02-23 17:57:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:26,646 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-02-23 17:57:26,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-02-23 17:57:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-02-23 17:57:26,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-02-23 17:57:26,648 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:26,648 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:26,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-23 17:57:26,648 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:26,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:26,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1200326400, now seen corresponding path program 15 times [2021-02-23 17:57:26,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:26,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94363739] [2021-02-23 17:57:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:26,651 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:57:26,678 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:57:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:57:26,711 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:57:26,764 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 17:57:26,764 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 17:57:26,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-23 17:57:26,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:57:26 BoogieIcfgContainer [2021-02-23 17:57:26,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:57:26,790 INFO L168 Benchmark]: Toolchain (without parser) took 16785.75 ms. Allocated memory was 153.1 MB in the beginning and 385.9 MB in the end (delta: 232.8 MB). Free memory was 128.8 MB in the beginning and 292.9 MB in the end (delta: -164.1 MB). Peak memory consumption was 70.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:57:26,790 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 153.1 MB. Free memory is still 139.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:57:26,790 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.14 ms. Allocated memory is still 153.1 MB. Free memory was 127.7 MB in the beginning and 118.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 17:57:26,790 INFO L168 Benchmark]: Boogie Preprocessor took 31.65 ms. Allocated memory is still 153.1 MB. Free memory was 118.5 MB in the beginning and 117.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:57:26,791 INFO L168 Benchmark]: RCFGBuilder took 451.42 ms. Allocated memory is still 153.1 MB. Free memory was 117.2 MB in the beginning and 132.0 MB in the end (delta: -14.8 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:57:26,791 INFO L168 Benchmark]: TraceAbstraction took 16040.76 ms. Allocated memory was 153.1 MB in the beginning and 385.9 MB in the end (delta: 232.8 MB). Free memory was 131.6 MB in the beginning and 292.9 MB in the end (delta: -161.3 MB). Peak memory consumption was 71.7 MB. Max. memory is 8.0 GB. [2021-02-23 17:57:26,791 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 153.1 MB. Free memory is still 139.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 243.14 ms. Allocated memory is still 153.1 MB. Free memory was 127.7 MB in the beginning and 118.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.65 ms. Allocated memory is still 153.1 MB. Free memory was 118.5 MB in the beginning and 117.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 451.42 ms. Allocated memory is still 153.1 MB. Free memory was 117.2 MB in the beginning and 132.0 MB in the end (delta: -14.8 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16040.76 ms. Allocated memory was 153.1 MB in the beginning and 385.9 MB in the end (delta: 232.8 MB). Free memory was 131.6 MB in the beginning and 292.9 MB in the end (delta: -161.3 MB). Peak memory consumption was 71.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int a = 15; [L15] int b = 0; [L16] CALL, EXPR sum(a, b) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND TRUE n <= 0 [L7] return m + n; [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15.9s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 8.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 393 SDtfs, 1319 SDslu, 883 SDs, 0 SdLazy, 1678 SolverSat, 384 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 600 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...