/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/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:47:04,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:47:04,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:47:04,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 21:47:04,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:47:04,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:47:04,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:47:04,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:47:04,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:47:04,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:47:04,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:47:04,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:47:04,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:47:04,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:47:04,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:47:04,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:47:04,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:47:04,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:47:04,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:47:04,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:47:04,421 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:47:04,434 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:47:04,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:47:04,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:47:04,436 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:47:04,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:47:04,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:47:04,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:47:04,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:47:04,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:47:04,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:47:04,438 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:47:04,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:47:04,438 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:47:04,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:47:04,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:47:04,439 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:47:04,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:47:04,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:47:04,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:47:04,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:47:04,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:47:04,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:47:04,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:47:04,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:47:04,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:47:04,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:47:04,892 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:47:04,892 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:47:04,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-10-23 21:47:04,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f58493f3a/5b4a363ba7664bf4abb6cf1947aa065d/FLAGab0ab6be6 [2020-10-23 21:47:05,598 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:47:05,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-10-23 21:47:05,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f58493f3a/5b4a363ba7664bf4abb6cf1947aa065d/FLAGab0ab6be6 [2020-10-23 21:47:05,969 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f58493f3a/5b4a363ba7664bf4abb6cf1947aa065d [2020-10-23 21:47:05,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:47:05,980 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:47:05,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:47:05,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:47:05,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:47:05,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:47:05" (1/1) ... [2020-10-23 21:47:05,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50822c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:05, skipping insertion in model container [2020-10-23 21:47:05,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:47:05" (1/1) ... [2020-10-23 21:47:06,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:47:06,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:47:06,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:47:06,201 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:47:06,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:47:06,244 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:47:06,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:06 WrapperNode [2020-10-23 21:47:06,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:47:06,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:47:06,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:47:06,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:47:06,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:06" (1/1) ... [2020-10-23 21:47:06,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:06" (1/1) ... [2020-10-23 21:47:06,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:06" (1/1) ... [2020-10-23 21:47:06,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:06" (1/1) ... [2020-10-23 21:47:06,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:06" (1/1) ... [2020-10-23 21:47:06,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:06" (1/1) ... [2020-10-23 21:47:06,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:06" (1/1) ... [2020-10-23 21:47:06,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:47:06,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:47:06,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:47:06,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:47:06,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:47:06,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:47:06,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:47:06,381 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:47:06,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:47:06,381 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:47:06,381 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:47:06,382 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:47:06,382 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:47:06,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:47:06,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:47:06,383 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:47:06,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:47:06,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:47:06,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:47:06,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:47:06,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:47:06,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:47:06,719 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:47:06,719 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 21:47:06,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:47:06 BoogieIcfgContainer [2020-10-23 21:47:06,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:47:06,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:47:06,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:47:06,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:47:06,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:47:05" (1/3) ... [2020-10-23 21:47:06,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a11d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:47:06, skipping insertion in model container [2020-10-23 21:47:06,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:06" (2/3) ... [2020-10-23 21:47:06,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a11d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:47:06, skipping insertion in model container [2020-10-23 21:47:06,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:47:06" (3/3) ... [2020-10-23 21:47:06,732 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-10-23 21:47:06,746 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:47:06,752 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:47:06,782 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:47:06,810 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:47:06,810 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:47:06,811 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:47:06,811 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:47:06,811 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:47:06,811 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:47:06,812 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:47:06,812 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:47:06,830 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-23 21:47:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 21:47:06,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:06,841 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] [2020-10-23 21:47:06,842 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:06,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:06,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1359326843, now seen corresponding path program 1 times [2020-10-23 21:47:06,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:06,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575699618] [2020-10-23 21:47:06,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:06,944 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:07,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:07,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575699618] [2020-10-23 21:47:07,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:07,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:47:07,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062815261] [2020-10-23 21:47:07,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:47:07,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:07,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:47:07,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:47:07,282 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-23 21:47:07,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:07,453 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-10-23 21:47:07,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:47:07,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-23 21:47:07,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:07,465 INFO L225 Difference]: With dead ends: 55 [2020-10-23 21:47:07,465 INFO L226 Difference]: Without dead ends: 27 [2020-10-23 21:47:07,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:47:07,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-23 21:47:07,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-23 21:47:07,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-23 21:47:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-23 21:47:07,516 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 22 [2020-10-23 21:47:07,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:07,517 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-23 21:47:07,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:47:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-23 21:47:07,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 21:47:07,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:07,519 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] [2020-10-23 21:47:07,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:47:07,520 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:07,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:07,521 INFO L82 PathProgramCache]: Analyzing trace with hash -756925380, now seen corresponding path program 1 times [2020-10-23 21:47:07,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:07,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139543778] [2020-10-23 21:47:07,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:07,526 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:07,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:07,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139543778] [2020-10-23 21:47:07,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:07,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 21:47:07,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723954324] [2020-10-23 21:47:07,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 21:47:07,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:07,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 21:47:07,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 21:47:07,660 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 4 states. [2020-10-23 21:47:07,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:07,766 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-23 21:47:07,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 21:47:07,767 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-23 21:47:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:07,769 INFO L225 Difference]: With dead ends: 38 [2020-10-23 21:47:07,769 INFO L226 Difference]: Without dead ends: 31 [2020-10-23 21:47:07,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 21:47:07,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-23 21:47:07,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-23 21:47:07,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-23 21:47:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-23 21:47:07,781 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2020-10-23 21:47:07,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:07,782 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-23 21:47:07,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 21:47:07,782 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-23 21:47:07,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 21:47:07,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:07,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:07,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:47:07,784 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:07,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:07,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1456501324, now seen corresponding path program 1 times [2020-10-23 21:47:07,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:07,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595610701] [2020-10-23 21:47:07,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:07,862 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:07,864 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:08,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:08,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595610701] [2020-10-23 21:47:08,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:08,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 21:47:08,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842777383] [2020-10-23 21:47:08,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 21:47:08,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:08,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 21:47:08,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:47:08,028 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 6 states. [2020-10-23 21:47:08,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:08,235 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-23 21:47:08,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 21:47:08,236 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-23 21:47:08,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:08,238 INFO L225 Difference]: With dead ends: 43 [2020-10-23 21:47:08,238 INFO L226 Difference]: Without dead ends: 36 [2020-10-23 21:47:08,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:47:08,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-23 21:47:08,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-23 21:47:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-23 21:47:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-23 21:47:08,250 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2020-10-23 21:47:08,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:08,250 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-23 21:47:08,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 21:47:08,251 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-23 21:47:08,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 21:47:08,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:08,252 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 21:47:08,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 21:47:08,253 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:08,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:08,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1068341444, now seen corresponding path program 2 times [2020-10-23 21:47:08,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:08,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329732214] [2020-10-23 21:47:08,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:08,421 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 21:47:08,589 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:08,593 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:08,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:08,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329732214] [2020-10-23 21:47:08,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:08,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:47:08,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54762787] [2020-10-23 21:47:08,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:47:08,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:08,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:47:08,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:47:08,868 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 8 states. [2020-10-23 21:47:09,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:09,249 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-23 21:47:09,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 21:47:09,253 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-23 21:47:09,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:09,256 INFO L225 Difference]: With dead ends: 48 [2020-10-23 21:47:09,257 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 21:47:09,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-23 21:47:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 21:47:09,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-23 21:47:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 21:47:09,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-23 21:47:09,280 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2020-10-23 21:47:09,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:09,281 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-23 21:47:09,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:47:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-23 21:47:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 21:47:09,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:09,286 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 21:47:09,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 21:47:09,286 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:09,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:09,289 INFO L82 PathProgramCache]: Analyzing trace with hash 35799732, now seen corresponding path program 3 times [2020-10-23 21:47:09,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:09,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464126188] [2020-10-23 21:47:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:09,443 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:09,446 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:09,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:09,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464126188] [2020-10-23 21:47:09,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:09,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 21:47:09,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920245586] [2020-10-23 21:47:09,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 21:47:09,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:09,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 21:47:09,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-23 21:47:09,641 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 10 states. [2020-10-23 21:47:09,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:09,845 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-23 21:47:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 21:47:09,845 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-23 21:47:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:09,847 INFO L225 Difference]: With dead ends: 53 [2020-10-23 21:47:09,847 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 21:47:09,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-23 21:47:09,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 21:47:09,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-23 21:47:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-23 21:47:09,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-23 21:47:09,871 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2020-10-23 21:47:09,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:09,872 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-23 21:47:09,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 21:47:09,872 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-23 21:47:09,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 21:47:09,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:09,874 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 21:47:09,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 21:47:09,874 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:09,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:09,875 INFO L82 PathProgramCache]: Analyzing trace with hash 197710396, now seen corresponding path program 4 times [2020-10-23 21:47:09,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:09,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323421132] [2020-10-23 21:47:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:10,006 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:10,007 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:10,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:10,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323421132] [2020-10-23 21:47:10,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:10,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 21:47:10,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529711939] [2020-10-23 21:47:10,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 21:47:10,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:10,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 21:47:10,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 21:47:10,238 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 12 states. [2020-10-23 21:47:10,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:10,515 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-23 21:47:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 21:47:10,516 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-23 21:47:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:10,517 INFO L225 Difference]: With dead ends: 58 [2020-10-23 21:47:10,518 INFO L226 Difference]: Without dead ends: 51 [2020-10-23 21:47:10,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-23 21:47:10,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-23 21:47:10,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-10-23 21:47:10,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-23 21:47:10,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-23 21:47:10,539 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2020-10-23 21:47:10,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:10,540 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-23 21:47:10,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 21:47:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-23 21:47:10,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 21:47:10,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:10,541 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 21:47:10,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 21:47:10,542 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash 116832180, now seen corresponding path program 5 times [2020-10-23 21:47:10,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:10,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024791543] [2020-10-23 21:47:10,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:10,682 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:10,684 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:10,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:10,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024791543] [2020-10-23 21:47:10,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:10,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-23 21:47:10,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538997195] [2020-10-23 21:47:10,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 21:47:10,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:10,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 21:47:10,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-23 21:47:10,913 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 14 states. [2020-10-23 21:47:11,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:11,257 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-23 21:47:11,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 21:47:11,258 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-23 21:47:11,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:11,259 INFO L225 Difference]: With dead ends: 63 [2020-10-23 21:47:11,259 INFO L226 Difference]: Without dead ends: 56 [2020-10-23 21:47:11,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-23 21:47:11,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-23 21:47:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-23 21:47:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 21:47:11,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-23 21:47:11,281 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2020-10-23 21:47:11,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:11,282 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-23 21:47:11,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 21:47:11,282 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-23 21:47:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 21:47:11,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:11,289 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 21:47:11,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 21:47:11,289 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:11,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:11,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1837793988, now seen corresponding path program 6 times [2020-10-23 21:47:11,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:11,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789384665] [2020-10-23 21:47:11,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:11,413 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:11,415 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:11,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:11,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789384665] [2020-10-23 21:47:11,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:11,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-23 21:47:11,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064807210] [2020-10-23 21:47:11,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 21:47:11,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:11,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 21:47:11,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-23 21:47:11,640 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 16 states. [2020-10-23 21:47:11,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:11,985 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-23 21:47:11,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 21:47:11,986 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-23 21:47:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:11,988 INFO L225 Difference]: With dead ends: 68 [2020-10-23 21:47:11,988 INFO L226 Difference]: Without dead ends: 61 [2020-10-23 21:47:11,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-10-23 21:47:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-23 21:47:11,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-10-23 21:47:11,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-23 21:47:11,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-23 21:47:11,999 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 52 [2020-10-23 21:47:12,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:12,000 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-23 21:47:12,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 21:47:12,000 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-23 21:47:12,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 21:47:12,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:12,001 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 21:47:12,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 21:47:12,002 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:12,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:12,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1736643404, now seen corresponding path program 7 times [2020-10-23 21:47:12,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:12,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059949900] [2020-10-23 21:47:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:12,111 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:12,113 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:12,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:12,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059949900] [2020-10-23 21:47:12,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:12,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-23 21:47:12,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708236051] [2020-10-23 21:47:12,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 21:47:12,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:12,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 21:47:12,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-23 21:47:12,383 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 18 states. [2020-10-23 21:47:12,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:12,850 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-10-23 21:47:12,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 21:47:12,856 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-10-23 21:47:12,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:12,857 INFO L225 Difference]: With dead ends: 73 [2020-10-23 21:47:12,857 INFO L226 Difference]: Without dead ends: 66 [2020-10-23 21:47:12,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-10-23 21:47:12,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-23 21:47:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-10-23 21:47:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-23 21:47:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-23 21:47:12,877 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 57 [2020-10-23 21:47:12,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:12,878 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-23 21:47:12,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 21:47:12,878 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-23 21:47:12,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-23 21:47:12,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:12,882 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 21:47:12,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 21:47:12,883 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:12,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:12,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1971873852, now seen corresponding path program 8 times [2020-10-23 21:47:12,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:12,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165933067] [2020-10-23 21:47:12,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:12,998 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:12,999 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:13,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:13,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165933067] [2020-10-23 21:47:13,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:13,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-23 21:47:13,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310748380] [2020-10-23 21:47:13,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 21:47:13,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:13,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 21:47:13,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-23 21:47:13,345 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 20 states. [2020-10-23 21:47:13,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:13,935 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-23 21:47:13,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-23 21:47:13,935 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-10-23 21:47:13,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:13,937 INFO L225 Difference]: With dead ends: 78 [2020-10-23 21:47:13,937 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 21:47:13,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 21:47:13,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 21:47:13,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-23 21:47:13,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-23 21:47:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-10-23 21:47:13,949 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 62 [2020-10-23 21:47:13,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:13,950 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-10-23 21:47:13,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 21:47:13,950 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-10-23 21:47:13,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-23 21:47:13,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:13,951 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 21:47:13,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 21:47:13,952 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:13,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:13,952 INFO L82 PathProgramCache]: Analyzing trace with hash -746266188, now seen corresponding path program 9 times [2020-10-23 21:47:13,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:13,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35701243] [2020-10-23 21:47:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:14,070 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:14,072 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:14,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:14,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35701243] [2020-10-23 21:47:14,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:14,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-10-23 21:47:14,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791619989] [2020-10-23 21:47:14,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 21:47:14,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:14,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 21:47:14,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-23 21:47:14,456 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 22 states. [2020-10-23 21:47:14,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:14,980 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-10-23 21:47:14,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-23 21:47:14,984 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-10-23 21:47:14,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:14,985 INFO L225 Difference]: With dead ends: 83 [2020-10-23 21:47:14,985 INFO L226 Difference]: Without dead ends: 76 [2020-10-23 21:47:14,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 21:47:14,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-23 21:47:14,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-10-23 21:47:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-23 21:47:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-23 21:47:14,998 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 67 [2020-10-23 21:47:14,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:14,998 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-23 21:47:14,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 21:47:14,999 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-23 21:47:15,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-23 21:47:15,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:15,000 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 21:47:15,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 21:47:15,000 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:15,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:15,001 INFO L82 PathProgramCache]: Analyzing trace with hash 439456572, now seen corresponding path program 10 times [2020-10-23 21:47:15,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:15,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129845006] [2020-10-23 21:47:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:15,110 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:15,112 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:15,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:15,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129845006] [2020-10-23 21:47:15,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:15,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-10-23 21:47:15,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946846449] [2020-10-23 21:47:15,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 21:47:15,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:15,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 21:47:15,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-10-23 21:47:15,487 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 24 states. [2020-10-23 21:47:16,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:16,103 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-10-23 21:47:16,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-23 21:47:16,103 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 72 [2020-10-23 21:47:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:16,104 INFO L225 Difference]: With dead ends: 88 [2020-10-23 21:47:16,105 INFO L226 Difference]: Without dead ends: 81 [2020-10-23 21:47:16,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 21:47:16,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-23 21:47:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-10-23 21:47:16,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-23 21:47:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-10-23 21:47:16,122 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 72 [2020-10-23 21:47:16,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:16,122 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-10-23 21:47:16,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 21:47:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-10-23 21:47:16,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-23 21:47:16,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:16,123 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 21:47:16,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 21:47:16,123 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:16,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:16,124 INFO L82 PathProgramCache]: Analyzing trace with hash 283023028, now seen corresponding path program 11 times [2020-10-23 21:47:16,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:16,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595259552] [2020-10-23 21:47:16,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:16,246 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:16,247 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:16,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:16,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595259552] [2020-10-23 21:47:16,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:16,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-10-23 21:47:16,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446578192] [2020-10-23 21:47:16,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-23 21:47:16,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:16,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-23 21:47:16,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-10-23 21:47:16,716 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 26 states. [2020-10-23 21:47:17,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:17,515 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2020-10-23 21:47:17,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-23 21:47:17,516 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 77 [2020-10-23 21:47:17,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:17,517 INFO L225 Difference]: With dead ends: 93 [2020-10-23 21:47:17,517 INFO L226 Difference]: Without dead ends: 86 [2020-10-23 21:47:17,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-10-23 21:47:17,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-23 21:47:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-10-23 21:47:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-23 21:47:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-10-23 21:47:17,547 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 77 [2020-10-23 21:47:17,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:17,548 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-10-23 21:47:17,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-23 21:47:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-10-23 21:47:17,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-23 21:47:17,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:17,550 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 21:47:17,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 21:47:17,550 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:17,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:17,551 INFO L82 PathProgramCache]: Analyzing trace with hash 698416700, now seen corresponding path program 12 times [2020-10-23 21:47:17,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:17,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643987971] [2020-10-23 21:47:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:17,697 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:17,699 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:18,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:18,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643987971] [2020-10-23 21:47:18,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:18,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-10-23 21:47:18,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009190798] [2020-10-23 21:47:18,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-23 21:47:18,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:18,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-23 21:47:18,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-10-23 21:47:18,206 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 28 states. [2020-10-23 21:47:19,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:19,003 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-10-23 21:47:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-23 21:47:19,005 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 82 [2020-10-23 21:47:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:19,006 INFO L225 Difference]: With dead ends: 98 [2020-10-23 21:47:19,006 INFO L226 Difference]: Without dead ends: 91 [2020-10-23 21:47:19,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-10-23 21:47:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-23 21:47:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-10-23 21:47:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-23 21:47:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-10-23 21:47:19,016 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 82 [2020-10-23 21:47:19,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:19,016 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-10-23 21:47:19,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-23 21:47:19,017 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-10-23 21:47:19,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-23 21:47:19,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:19,018 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 21:47:19,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 21:47:19,018 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:19,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:19,019 INFO L82 PathProgramCache]: Analyzing trace with hash -447083596, now seen corresponding path program 13 times [2020-10-23 21:47:19,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:19,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881180038] [2020-10-23 21:47:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:19,128 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:19,129 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:19,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:19,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881180038] [2020-10-23 21:47:19,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:19,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-10-23 21:47:19,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993102227] [2020-10-23 21:47:19,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-23 21:47:19,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:19,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-23 21:47:19,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-10-23 21:47:19,649 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 30 states. [2020-10-23 21:47:20,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:20,576 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2020-10-23 21:47:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-23 21:47:20,577 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 87 [2020-10-23 21:47:20,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:20,578 INFO L225 Difference]: With dead ends: 103 [2020-10-23 21:47:20,578 INFO L226 Difference]: Without dead ends: 96 [2020-10-23 21:47:20,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-10-23 21:47:20,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-23 21:47:20,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-10-23 21:47:20,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-23 21:47:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-10-23 21:47:20,586 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 87 [2020-10-23 21:47:20,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:20,587 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-10-23 21:47:20,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-23 21:47:20,587 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-10-23 21:47:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-23 21:47:20,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:20,590 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 21:47:20,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 21:47:20,591 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:20,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:20,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1861834436, now seen corresponding path program 14 times [2020-10-23 21:47:20,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:20,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259737540] [2020-10-23 21:47:20,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:20,696 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:20,698 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:21,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:21,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259737540] [2020-10-23 21:47:21,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:21,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-10-23 21:47:21,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142588359] [2020-10-23 21:47:21,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-23 21:47:21,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:21,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-23 21:47:21,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-10-23 21:47:21,408 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 32 states. [2020-10-23 21:47:22,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:22,414 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-10-23 21:47:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-23 21:47:22,415 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2020-10-23 21:47:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:22,416 INFO L225 Difference]: With dead ends: 108 [2020-10-23 21:47:22,416 INFO L226 Difference]: Without dead ends: 101 [2020-10-23 21:47:22,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-10-23 21:47:22,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-23 21:47:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-10-23 21:47:22,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-23 21:47:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2020-10-23 21:47:22,426 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 92 [2020-10-23 21:47:22,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:22,426 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2020-10-23 21:47:22,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-23 21:47:22,426 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2020-10-23 21:47:22,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-23 21:47:22,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:22,428 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 21:47:22,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 21:47:22,428 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:22,429 INFO L82 PathProgramCache]: Analyzing trace with hash 566706356, now seen corresponding path program 15 times [2020-10-23 21:47:22,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:22,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960265973] [2020-10-23 21:47:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:22,534 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:22,535 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:23,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:23,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960265973] [2020-10-23 21:47:23,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:23,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-10-23 21:47:23,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913129493] [2020-10-23 21:47:23,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-23 21:47:23,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:23,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-23 21:47:23,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 21:47:23,223 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 34 states. [2020-10-23 21:47:24,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:24,280 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2020-10-23 21:47:24,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-23 21:47:24,280 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2020-10-23 21:47:24,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:24,281 INFO L225 Difference]: With dead ends: 113 [2020-10-23 21:47:24,281 INFO L226 Difference]: Without dead ends: 106 [2020-10-23 21:47:24,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-10-23 21:47:24,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-23 21:47:24,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-10-23 21:47:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-23 21:47:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-10-23 21:47:24,291 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 97 [2020-10-23 21:47:24,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:24,292 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-10-23 21:47:24,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-23 21:47:24,292 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-10-23 21:47:24,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-23 21:47:24,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:24,293 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:24,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 21:47:24,294 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:24,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:24,294 INFO L82 PathProgramCache]: Analyzing trace with hash -2121100228, now seen corresponding path program 16 times [2020-10-23 21:47:24,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:24,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403681395] [2020-10-23 21:47:24,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:24,407 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:24,409 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:25,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:25,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403681395] [2020-10-23 21:47:25,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:25,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-10-23 21:47:25,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009139791] [2020-10-23 21:47:25,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-23 21:47:25,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:25,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-23 21:47:25,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 21:47:25,123 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 36 states. [2020-10-23 21:47:26,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:26,340 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-10-23 21:47:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-23 21:47:26,341 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 102 [2020-10-23 21:47:26,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:26,342 INFO L225 Difference]: With dead ends: 118 [2020-10-23 21:47:26,342 INFO L226 Difference]: Without dead ends: 111 [2020-10-23 21:47:26,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-10-23 21:47:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-23 21:47:26,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-10-23 21:47:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-23 21:47:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2020-10-23 21:47:26,354 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 102 [2020-10-23 21:47:26,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:26,354 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2020-10-23 21:47:26,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-23 21:47:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2020-10-23 21:47:26,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-23 21:47:26,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:26,355 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:26,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 21:47:26,356 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:26,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:26,356 INFO L82 PathProgramCache]: Analyzing trace with hash -755616332, now seen corresponding path program 17 times [2020-10-23 21:47:26,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:26,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069032163] [2020-10-23 21:47:26,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:26,459 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:26,460 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:27,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:27,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069032163] [2020-10-23 21:47:27,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:27,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-10-23 21:47:27,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018812713] [2020-10-23 21:47:27,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-23 21:47:27,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:27,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-23 21:47:27,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-10-23 21:47:27,255 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 38 states. [2020-10-23 21:47:28,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:28,542 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2020-10-23 21:47:28,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-23 21:47:28,543 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2020-10-23 21:47:28,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:28,544 INFO L225 Difference]: With dead ends: 123 [2020-10-23 21:47:28,544 INFO L226 Difference]: Without dead ends: 116 [2020-10-23 21:47:28,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-10-23 21:47:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-23 21:47:28,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2020-10-23 21:47:28,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-23 21:47:28,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-10-23 21:47:28,554 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 107 [2020-10-23 21:47:28,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:28,554 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-10-23 21:47:28,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-23 21:47:28,554 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-10-23 21:47:28,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-23 21:47:28,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:28,555 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:28,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 21:47:28,556 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:28,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:28,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1886699324, now seen corresponding path program 18 times [2020-10-23 21:47:28,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:28,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258763784] [2020-10-23 21:47:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:28,668 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:28,669 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:29,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:29,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258763784] [2020-10-23 21:47:29,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:29,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-10-23 21:47:29,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404773019] [2020-10-23 21:47:29,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-23 21:47:29,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:29,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-23 21:47:29,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 21:47:29,554 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 40 states. [2020-10-23 21:47:31,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:31,017 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-10-23 21:47:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-23 21:47:31,018 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 112 [2020-10-23 21:47:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:31,020 INFO L225 Difference]: With dead ends: 128 [2020-10-23 21:47:31,020 INFO L226 Difference]: Without dead ends: 121 [2020-10-23 21:47:31,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-10-23 21:47:31,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-23 21:47:31,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2020-10-23 21:47:31,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-23 21:47:31,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2020-10-23 21:47:31,029 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 112 [2020-10-23 21:47:31,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:31,030 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2020-10-23 21:47:31,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-23 21:47:31,030 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2020-10-23 21:47:31,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-23 21:47:31,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:31,031 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:31,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-23 21:47:31,031 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:31,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:31,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1102506676, now seen corresponding path program 19 times [2020-10-23 21:47:31,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:31,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101345476] [2020-10-23 21:47:31,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:31,146 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:31,148 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:32,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:32,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101345476] [2020-10-23 21:47:32,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:32,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-10-23 21:47:32,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648973114] [2020-10-23 21:47:32,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-23 21:47:32,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:32,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-23 21:47:32,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-10-23 21:47:32,106 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 42 states. [2020-10-23 21:47:33,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:33,578 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2020-10-23 21:47:33,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-23 21:47:33,580 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 117 [2020-10-23 21:47:33,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:33,581 INFO L225 Difference]: With dead ends: 133 [2020-10-23 21:47:33,582 INFO L226 Difference]: Without dead ends: 126 [2020-10-23 21:47:33,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-10-23 21:47:33,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-23 21:47:33,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2020-10-23 21:47:33,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-23 21:47:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-10-23 21:47:33,591 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 117 [2020-10-23 21:47:33,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:33,591 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-10-23 21:47:33,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-23 21:47:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-10-23 21:47:33,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-23 21:47:33,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:33,592 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:33,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-23 21:47:33,593 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:33,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:33,593 INFO L82 PathProgramCache]: Analyzing trace with hash 383593020, now seen corresponding path program 20 times [2020-10-23 21:47:33,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:33,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646080446] [2020-10-23 21:47:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:33,710 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:33,711 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:34,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:34,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646080446] [2020-10-23 21:47:34,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:34,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-10-23 21:47:34,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588686759] [2020-10-23 21:47:34,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-23 21:47:34,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:34,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-23 21:47:34,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 21:47:34,784 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 44 states. [2020-10-23 21:47:36,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:36,436 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-10-23 21:47:36,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-23 21:47:36,440 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 122 [2020-10-23 21:47:36,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:36,441 INFO L225 Difference]: With dead ends: 138 [2020-10-23 21:47:36,441 INFO L226 Difference]: Without dead ends: 131 [2020-10-23 21:47:36,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-10-23 21:47:36,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-23 21:47:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2020-10-23 21:47:36,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-23 21:47:36,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2020-10-23 21:47:36,451 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 122 [2020-10-23 21:47:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:36,451 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2020-10-23 21:47:36,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-23 21:47:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2020-10-23 21:47:36,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-23 21:47:36,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:36,452 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:36,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-23 21:47:36,452 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:36,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:36,453 INFO L82 PathProgramCache]: Analyzing trace with hash -220635212, now seen corresponding path program 21 times [2020-10-23 21:47:36,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:36,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561326448] [2020-10-23 21:47:36,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:36,574 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:36,576 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:37,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:37,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561326448] [2020-10-23 21:47:37,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:37,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-10-23 21:47:37,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633973568] [2020-10-23 21:47:37,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-23 21:47:37,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:37,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-23 21:47:37,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-10-23 21:47:37,708 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 46 states. [2020-10-23 21:47:39,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:39,621 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2020-10-23 21:47:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-23 21:47:39,622 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 127 [2020-10-23 21:47:39,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:39,623 INFO L225 Difference]: With dead ends: 143 [2020-10-23 21:47:39,624 INFO L226 Difference]: Without dead ends: 136 [2020-10-23 21:47:39,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-10-23 21:47:39,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-23 21:47:39,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2020-10-23 21:47:39,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-23 21:47:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2020-10-23 21:47:39,633 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 127 [2020-10-23 21:47:39,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:39,634 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2020-10-23 21:47:39,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-23 21:47:39,634 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2020-10-23 21:47:39,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-23 21:47:39,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:39,635 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:39,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-23 21:47:39,635 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:39,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:39,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1912329532, now seen corresponding path program 22 times [2020-10-23 21:47:39,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:39,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788385452] [2020-10-23 21:47:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:39,757 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:39,758 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:41,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:41,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788385452] [2020-10-23 21:47:41,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:41,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-10-23 21:47:41,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895885739] [2020-10-23 21:47:41,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-23 21:47:41,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:41,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-23 21:47:41,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-10-23 21:47:41,031 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 48 states. [2020-10-23 21:47:43,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:43,018 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2020-10-23 21:47:43,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-23 21:47:43,020 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 132 [2020-10-23 21:47:43,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:43,022 INFO L225 Difference]: With dead ends: 148 [2020-10-23 21:47:43,022 INFO L226 Difference]: Without dead ends: 141 [2020-10-23 21:47:43,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-10-23 21:47:43,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-23 21:47:43,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2020-10-23 21:47:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-23 21:47:43,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2020-10-23 21:47:43,030 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 132 [2020-10-23 21:47:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:43,031 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2020-10-23 21:47:43,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-23 21:47:43,031 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2020-10-23 21:47:43,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-23 21:47:43,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:43,032 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:43,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-23 21:47:43,032 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:43,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:43,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1490185036, now seen corresponding path program 23 times [2020-10-23 21:47:43,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:43,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844932888] [2020-10-23 21:47:43,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:43,154 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:43,156 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:44,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:44,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844932888] [2020-10-23 21:47:44,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:44,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-10-23 21:47:44,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279849092] [2020-10-23 21:47:44,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-23 21:47:44,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:44,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-23 21:47:44,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-10-23 21:47:44,465 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 50 states. [2020-10-23 21:47:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:46,693 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2020-10-23 21:47:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-23 21:47:46,694 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 137 [2020-10-23 21:47:46,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:46,696 INFO L225 Difference]: With dead ends: 153 [2020-10-23 21:47:46,696 INFO L226 Difference]: Without dead ends: 146 [2020-10-23 21:47:46,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-10-23 21:47:46,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-23 21:47:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2020-10-23 21:47:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-23 21:47:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2020-10-23 21:47:46,704 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 137 [2020-10-23 21:47:46,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:46,704 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2020-10-23 21:47:46,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-23 21:47:46,704 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2020-10-23 21:47:46,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-23 21:47:46,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:46,705 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:46,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-23 21:47:46,706 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:46,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:46,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1023360964, now seen corresponding path program 24 times [2020-10-23 21:47:46,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:46,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473771485] [2020-10-23 21:47:46,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:46,822 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:46,824 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:48,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:48,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473771485] [2020-10-23 21:47:48,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:48,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-10-23 21:47:48,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325123099] [2020-10-23 21:47:48,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-23 21:47:48,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:48,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-23 21:47:48,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-10-23 21:47:48,307 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 52 states. [2020-10-23 21:47:50,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:50,715 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2020-10-23 21:47:50,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-23 21:47:50,715 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 142 [2020-10-23 21:47:50,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:50,717 INFO L225 Difference]: With dead ends: 158 [2020-10-23 21:47:50,717 INFO L226 Difference]: Without dead ends: 151 [2020-10-23 21:47:50,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-10-23 21:47:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-23 21:47:50,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2020-10-23 21:47:50,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-23 21:47:50,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2020-10-23 21:47:50,730 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 142 [2020-10-23 21:47:50,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:50,730 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2020-10-23 21:47:50,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-23 21:47:50,730 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2020-10-23 21:47:50,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-23 21:47:50,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:50,731 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:50,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-23 21:47:50,732 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:50,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:50,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1535347124, now seen corresponding path program 25 times [2020-10-23 21:47:50,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:50,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253054306] [2020-10-23 21:47:50,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:50,845 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:50,846 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:52,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:52,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253054306] [2020-10-23 21:47:52,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:52,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2020-10-23 21:47:52,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508605524] [2020-10-23 21:47:52,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-23 21:47:52,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:52,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-23 21:47:52,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-10-23 21:47:52,426 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 54 states. [2020-10-23 21:47:55,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:55,093 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2020-10-23 21:47:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-23 21:47:55,099 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 147 [2020-10-23 21:47:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:55,101 INFO L225 Difference]: With dead ends: 163 [2020-10-23 21:47:55,101 INFO L226 Difference]: Without dead ends: 156 [2020-10-23 21:47:55,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-10-23 21:47:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-23 21:47:55,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-10-23 21:47:55,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-23 21:47:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-10-23 21:47:55,117 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 147 [2020-10-23 21:47:55,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:55,117 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-10-23 21:47:55,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-23 21:47:55,117 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-10-23 21:47:55,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-23 21:47:55,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:55,119 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:55,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-23 21:47:55,119 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:55,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:55,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1893995716, now seen corresponding path program 26 times [2020-10-23 21:47:55,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:55,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840111017] [2020-10-23 21:47:55,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:55,235 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:55,238 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:56,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:56,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840111017] [2020-10-23 21:47:56,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:56,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-10-23 21:47:56,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822680677] [2020-10-23 21:47:56,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-23 21:47:56,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:56,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-23 21:47:56,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-10-23 21:47:56,944 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 56 states. [2020-10-23 21:47:59,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:59,749 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2020-10-23 21:47:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-23 21:47:59,749 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 152 [2020-10-23 21:47:59,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:59,751 INFO L225 Difference]: With dead ends: 168 [2020-10-23 21:47:59,751 INFO L226 Difference]: Without dead ends: 161 [2020-10-23 21:47:59,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-10-23 21:47:59,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-23 21:47:59,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2020-10-23 21:47:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-23 21:47:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2020-10-23 21:47:59,760 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 152 [2020-10-23 21:47:59,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:59,760 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2020-10-23 21:47:59,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-23 21:47:59,760 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2020-10-23 21:47:59,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-23 21:47:59,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:59,762 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:59,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-23 21:47:59,762 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:59,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:59,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1219182260, now seen corresponding path program 27 times [2020-10-23 21:47:59,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:59,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407673205] [2020-10-23 21:47:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:59,884 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:59,886 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:01,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:01,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407673205] [2020-10-23 21:48:01,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:01,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2020-10-23 21:48:01,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999080695] [2020-10-23 21:48:01,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-23 21:48:01,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:01,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-23 21:48:01,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-10-23 21:48:01,728 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 58 states. [2020-10-23 21:48:04,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:04,734 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2020-10-23 21:48:04,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-23 21:48:04,735 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 157 [2020-10-23 21:48:04,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:04,736 INFO L225 Difference]: With dead ends: 173 [2020-10-23 21:48:04,737 INFO L226 Difference]: Without dead ends: 166 [2020-10-23 21:48:04,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3920, Invalid=8512, Unknown=0, NotChecked=0, Total=12432 [2020-10-23 21:48:04,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-23 21:48:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2020-10-23 21:48:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-23 21:48:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2020-10-23 21:48:04,746 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 157 [2020-10-23 21:48:04,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:04,747 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2020-10-23 21:48:04,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-23 21:48:04,747 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2020-10-23 21:48:04,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-23 21:48:04,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:04,748 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:04,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-23 21:48:04,748 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:04,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:04,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1619175876, now seen corresponding path program 28 times [2020-10-23 21:48:04,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:04,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626578404] [2020-10-23 21:48:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:04,859 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:04,860 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:06,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:06,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626578404] [2020-10-23 21:48:06,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:06,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-10-23 21:48:06,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103018154] [2020-10-23 21:48:06,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-23 21:48:06,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:06,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-23 21:48:06,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-10-23 21:48:06,797 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 60 states. [2020-10-23 21:48:10,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:10,064 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2020-10-23 21:48:10,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-23 21:48:10,065 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 162 [2020-10-23 21:48:10,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:10,067 INFO L225 Difference]: With dead ends: 178 [2020-10-23 21:48:10,067 INFO L226 Difference]: Without dead ends: 171 [2020-10-23 21:48:10,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-10-23 21:48:10,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-23 21:48:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2020-10-23 21:48:10,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-23 21:48:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2020-10-23 21:48:10,076 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 162 [2020-10-23 21:48:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:10,076 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2020-10-23 21:48:10,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-23 21:48:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2020-10-23 21:48:10,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-23 21:48:10,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:10,077 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:10,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-23 21:48:10,077 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:10,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:10,078 INFO L82 PathProgramCache]: Analyzing trace with hash -478891084, now seen corresponding path program 29 times [2020-10-23 21:48:10,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:10,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300583402] [2020-10-23 21:48:10,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:10,186 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:10,187 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:12,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:12,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300583402] [2020-10-23 21:48:12,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:12,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2020-10-23 21:48:12,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97508859] [2020-10-23 21:48:12,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-23 21:48:12,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:12,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-23 21:48:12,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2020-10-23 21:48:12,288 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 62 states. [2020-10-23 21:48:15,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:15,767 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2020-10-23 21:48:15,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-23 21:48:15,772 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 167 [2020-10-23 21:48:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:15,773 INFO L225 Difference]: With dead ends: 183 [2020-10-23 21:48:15,773 INFO L226 Difference]: Without dead ends: 176 [2020-10-23 21:48:15,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4500, Invalid=9780, Unknown=0, NotChecked=0, Total=14280 [2020-10-23 21:48:15,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-23 21:48:15,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2020-10-23 21:48:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-23 21:48:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2020-10-23 21:48:15,782 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 167 [2020-10-23 21:48:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:15,783 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2020-10-23 21:48:15,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-23 21:48:15,783 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2020-10-23 21:48:15,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-23 21:48:15,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:15,784 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:15,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-23 21:48:15,784 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:15,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:15,785 INFO L82 PathProgramCache]: Analyzing trace with hash 22348092, now seen corresponding path program 30 times [2020-10-23 21:48:15,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:15,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549053654] [2020-10-23 21:48:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:15,899 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:15,901 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:18,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:18,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549053654] [2020-10-23 21:48:18,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:18,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2020-10-23 21:48:18,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175765719] [2020-10-23 21:48:18,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-23 21:48:18,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:18,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-23 21:48:18,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-10-23 21:48:18,115 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 64 states. [2020-10-23 21:48:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:21,854 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2020-10-23 21:48:21,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-10-23 21:48:21,854 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 172 [2020-10-23 21:48:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:21,857 INFO L225 Difference]: With dead ends: 188 [2020-10-23 21:48:21,857 INFO L226 Difference]: Without dead ends: 181 [2020-10-23 21:48:21,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-10-23 21:48:21,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-23 21:48:21,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2020-10-23 21:48:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-23 21:48:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2020-10-23 21:48:21,866 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 172 [2020-10-23 21:48:21,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:21,867 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2020-10-23 21:48:21,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-23 21:48:21,867 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2020-10-23 21:48:21,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-23 21:48:21,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:21,868 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:21,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-23 21:48:21,868 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:21,869 INFO L82 PathProgramCache]: Analyzing trace with hash -592451404, now seen corresponding path program 31 times [2020-10-23 21:48:21,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:21,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446922171] [2020-10-23 21:48:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:21,990 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:21,991 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:24,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:24,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446922171] [2020-10-23 21:48:24,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:24,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2020-10-23 21:48:24,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706509892] [2020-10-23 21:48:24,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-23 21:48:24,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:24,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-23 21:48:24,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2020-10-23 21:48:24,410 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 66 states. [2020-10-23 21:48:28,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:28,171 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2020-10-23 21:48:28,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-10-23 21:48:28,172 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 177 [2020-10-23 21:48:28,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:28,174 INFO L225 Difference]: With dead ends: 193 [2020-10-23 21:48:28,175 INFO L226 Difference]: Without dead ends: 186 [2020-10-23 21:48:28,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5120, Invalid=11136, Unknown=0, NotChecked=0, Total=16256 [2020-10-23 21:48:28,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-23 21:48:28,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2020-10-23 21:48:28,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-23 21:48:28,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2020-10-23 21:48:28,183 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 177 [2020-10-23 21:48:28,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:28,184 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2020-10-23 21:48:28,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-23 21:48:28,184 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2020-10-23 21:48:28,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-23 21:48:28,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:28,185 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:28,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-23 21:48:28,185 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:28,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:28,186 INFO L82 PathProgramCache]: Analyzing trace with hash 97709116, now seen corresponding path program 32 times [2020-10-23 21:48:28,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:28,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072131990] [2020-10-23 21:48:28,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:28,303 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:28,304 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:30,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:30,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072131990] [2020-10-23 21:48:30,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:30,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2020-10-23 21:48:30,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263683480] [2020-10-23 21:48:30,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-23 21:48:30,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:30,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-23 21:48:30,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-10-23 21:48:30,880 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 68 states. [2020-10-23 21:48:35,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:35,147 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2020-10-23 21:48:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-10-23 21:48:35,148 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 182 [2020-10-23 21:48:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:35,149 INFO L225 Difference]: With dead ends: 198 [2020-10-23 21:48:35,149 INFO L226 Difference]: Without dead ends: 191 [2020-10-23 21:48:35,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-10-23 21:48:35,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-23 21:48:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2020-10-23 21:48:35,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-23 21:48:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2020-10-23 21:48:35,157 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 182 [2020-10-23 21:48:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:35,158 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2020-10-23 21:48:35,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-23 21:48:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2020-10-23 21:48:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-23 21:48:35,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:35,159 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:35,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-23 21:48:35,159 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:35,160 INFO L82 PathProgramCache]: Analyzing trace with hash 556588468, now seen corresponding path program 33 times [2020-10-23 21:48:35,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:35,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067508794] [2020-10-23 21:48:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:35,280 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:35,281 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:38,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:38,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067508794] [2020-10-23 21:48:38,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:38,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2020-10-23 21:48:38,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100059932] [2020-10-23 21:48:38,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-23 21:48:38,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:38,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-23 21:48:38,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2020-10-23 21:48:38,075 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 70 states. [2020-10-23 21:48:42,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:42,452 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2020-10-23 21:48:42,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-10-23 21:48:42,453 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 187 [2020-10-23 21:48:42,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:42,455 INFO L225 Difference]: With dead ends: 203 [2020-10-23 21:48:42,456 INFO L226 Difference]: Without dead ends: 196 [2020-10-23 21:48:42,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=5780, Invalid=12580, Unknown=0, NotChecked=0, Total=18360 [2020-10-23 21:48:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-23 21:48:42,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2020-10-23 21:48:42,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-23 21:48:42,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2020-10-23 21:48:42,464 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 187 [2020-10-23 21:48:42,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:42,465 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2020-10-23 21:48:42,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-23 21:48:42,465 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2020-10-23 21:48:42,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-23 21:48:42,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:42,466 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:42,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-23 21:48:42,466 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:42,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:42,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1109858108, now seen corresponding path program 34 times [2020-10-23 21:48:42,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:42,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310071913] [2020-10-23 21:48:42,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:42,593 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:42,595 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:45,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:45,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310071913] [2020-10-23 21:48:45,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:45,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2020-10-23 21:48:45,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804711560] [2020-10-23 21:48:45,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-23 21:48:45,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:45,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-23 21:48:45,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-10-23 21:48:45,527 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 72 states. [2020-10-23 21:48:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:50,091 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2020-10-23 21:48:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-10-23 21:48:50,092 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 192 [2020-10-23 21:48:50,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:50,094 INFO L225 Difference]: With dead ends: 208 [2020-10-23 21:48:50,094 INFO L226 Difference]: Without dead ends: 201 [2020-10-23 21:48:50,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-10-23 21:48:50,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-23 21:48:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2020-10-23 21:48:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-23 21:48:50,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2020-10-23 21:48:50,103 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 192 [2020-10-23 21:48:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:50,104 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2020-10-23 21:48:50,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-23 21:48:50,104 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2020-10-23 21:48:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-23 21:48:50,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:50,105 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:50,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-23 21:48:50,105 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:50,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:50,106 INFO L82 PathProgramCache]: Analyzing trace with hash -642018636, now seen corresponding path program 35 times [2020-10-23 21:48:50,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:50,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585842491] [2020-10-23 21:48:50,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:50,228 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:50,230 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:53,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:53,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585842491] [2020-10-23 21:48:53,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:53,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2020-10-23 21:48:53,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724343444] [2020-10-23 21:48:53,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-23 21:48:53,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:53,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-23 21:48:53,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2020-10-23 21:48:53,541 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 74 states. [2020-10-23 21:48:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:58,424 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2020-10-23 21:48:58,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-10-23 21:48:58,425 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 197 [2020-10-23 21:48:58,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:58,427 INFO L225 Difference]: With dead ends: 213 [2020-10-23 21:48:58,427 INFO L226 Difference]: Without dead ends: 206 [2020-10-23 21:48:58,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=6480, Invalid=14112, Unknown=0, NotChecked=0, Total=20592 [2020-10-23 21:48:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-23 21:48:58,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2020-10-23 21:48:58,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-23 21:48:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2020-10-23 21:48:58,434 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 197 [2020-10-23 21:48:58,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:58,434 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2020-10-23 21:48:58,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-23 21:48:58,434 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2020-10-23 21:48:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-23 21:48:58,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:58,435 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:58,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-23 21:48:58,435 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:58,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:58,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1887337924, now seen corresponding path program 36 times [2020-10-23 21:48:58,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:58,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710632936] [2020-10-23 21:48:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:58,558 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:58,559 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:01,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:49:01,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710632936] [2020-10-23 21:49:01,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:01,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2020-10-23 21:49:01,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601786796] [2020-10-23 21:49:01,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-23 21:49:01,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:01,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-23 21:49:01,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-10-23 21:49:01,939 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 76 states. [2020-10-23 21:49:07,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:07,273 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2020-10-23 21:49:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-10-23 21:49:07,274 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 202 [2020-10-23 21:49:07,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:07,277 INFO L225 Difference]: With dead ends: 218 [2020-10-23 21:49:07,277 INFO L226 Difference]: Without dead ends: 211 [2020-10-23 21:49:07,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-10-23 21:49:07,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-23 21:49:07,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-10-23 21:49:07,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-23 21:49:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2020-10-23 21:49:07,286 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 202 [2020-10-23 21:49:07,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:07,287 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2020-10-23 21:49:07,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-23 21:49:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2020-10-23 21:49:07,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-23 21:49:07,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:07,288 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:49:07,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-23 21:49:07,288 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:07,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:07,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1798047668, now seen corresponding path program 37 times [2020-10-23 21:49:07,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:07,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969574808] [2020-10-23 21:49:07,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:07,414 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:07,415 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:10,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:49:10,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969574808] [2020-10-23 21:49:10,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:10,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2020-10-23 21:49:10,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654182001] [2020-10-23 21:49:10,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-23 21:49:10,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:10,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-23 21:49:10,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2020-10-23 21:49:10,967 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 78 states. [2020-10-23 21:49:16,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:16,733 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2020-10-23 21:49:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-10-23 21:49:16,734 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 207 [2020-10-23 21:49:16,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:16,736 INFO L225 Difference]: With dead ends: 223 [2020-10-23 21:49:16,736 INFO L226 Difference]: Without dead ends: 216 [2020-10-23 21:49:16,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=7220, Invalid=15732, Unknown=0, NotChecked=0, Total=22952 [2020-10-23 21:49:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-23 21:49:16,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2020-10-23 21:49:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-23 21:49:16,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2020-10-23 21:49:16,745 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 207 [2020-10-23 21:49:16,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:16,745 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2020-10-23 21:49:16,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-23 21:49:16,745 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2020-10-23 21:49:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-23 21:49:16,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:16,746 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:49:16,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-23 21:49:16,746 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:16,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:16,746 INFO L82 PathProgramCache]: Analyzing trace with hash 185740604, now seen corresponding path program 38 times [2020-10-23 21:49:16,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:16,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978741957] [2020-10-23 21:49:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:16,873 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:16,875 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:20,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:49:20,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978741957] [2020-10-23 21:49:20,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:20,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2020-10-23 21:49:20,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504062369] [2020-10-23 21:49:20,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-23 21:49:20,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:20,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-23 21:49:20,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-10-23 21:49:20,706 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 80 states. [2020-10-23 21:49:26,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:26,797 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2020-10-23 21:49:26,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-10-23 21:49:26,797 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 212 [2020-10-23 21:49:26,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:26,799 INFO L225 Difference]: With dead ends: 228 [2020-10-23 21:49:26,799 INFO L226 Difference]: Without dead ends: 221 [2020-10-23 21:49:26,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-10-23 21:49:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-23 21:49:26,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2020-10-23 21:49:26,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-23 21:49:26,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2020-10-23 21:49:26,809 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 212 [2020-10-23 21:49:26,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:26,809 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2020-10-23 21:49:26,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-23 21:49:26,809 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2020-10-23 21:49:26,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-23 21:49:26,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:26,811 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:49:26,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-23 21:49:26,811 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:26,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:26,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1984838836, now seen corresponding path program 39 times [2020-10-23 21:49:26,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:26,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813514504] [2020-10-23 21:49:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:26,951 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:26,952 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:30,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:49:31,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813514504] [2020-10-23 21:49:31,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:31,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2020-10-23 21:49:31,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937233249] [2020-10-23 21:49:31,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-23 21:49:31,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:31,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-23 21:49:31,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2020-10-23 21:49:31,006 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 82 states. [2020-10-23 21:49:37,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:37,365 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2020-10-23 21:49:37,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-10-23 21:49:37,366 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 217 [2020-10-23 21:49:37,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:37,368 INFO L225 Difference]: With dead ends: 233 [2020-10-23 21:49:37,368 INFO L226 Difference]: Without dead ends: 226 [2020-10-23 21:49:37,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4562 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=8000, Invalid=17440, Unknown=0, NotChecked=0, Total=25440 [2020-10-23 21:49:37,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-23 21:49:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2020-10-23 21:49:37,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-23 21:49:37,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2020-10-23 21:49:37,377 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 217 [2020-10-23 21:49:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:37,378 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2020-10-23 21:49:37,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-23 21:49:37,378 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2020-10-23 21:49:37,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-23 21:49:37,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:37,379 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:49:37,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-23 21:49:37,379 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:37,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:37,380 INFO L82 PathProgramCache]: Analyzing trace with hash 369694780, now seen corresponding path program 40 times [2020-10-23 21:49:37,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:37,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803134013] [2020-10-23 21:49:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:37,513 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:37,514 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:41,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:49:41,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803134013] [2020-10-23 21:49:41,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:41,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2020-10-23 21:49:41,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246100185] [2020-10-23 21:49:41,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-23 21:49:41,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:41,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-23 21:49:41,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-10-23 21:49:41,791 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 84 states. [2020-10-23 21:49:48,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:48,579 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2020-10-23 21:49:48,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-10-23 21:49:48,580 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 222 [2020-10-23 21:49:48,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:48,582 INFO L225 Difference]: With dead ends: 238 [2020-10-23 21:49:48,582 INFO L226 Difference]: Without dead ends: 231 [2020-10-23 21:49:48,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-10-23 21:49:48,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-23 21:49:48,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 228. [2020-10-23 21:49:48,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-23 21:49:48,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2020-10-23 21:49:48,592 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 222 [2020-10-23 21:49:48,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:48,592 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2020-10-23 21:49:48,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-23 21:49:48,592 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2020-10-23 21:49:48,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-23 21:49:48,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:48,594 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:49:48,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-23 21:49:48,594 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:48,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:48,594 INFO L82 PathProgramCache]: Analyzing trace with hash -671993420, now seen corresponding path program 41 times [2020-10-23 21:49:48,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:48,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049479550] [2020-10-23 21:49:48,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:48,718 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:48,719 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:53,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:49:53,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049479550] [2020-10-23 21:49:53,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:53,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2020-10-23 21:49:53,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374150235] [2020-10-23 21:49:53,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-23 21:49:53,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:53,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-23 21:49:53,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2020-10-23 21:49:53,288 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 86 states. [2020-10-23 21:50:00,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:50:00,561 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2020-10-23 21:50:00,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-10-23 21:50:00,562 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 227 [2020-10-23 21:50:00,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:50:00,564 INFO L225 Difference]: With dead ends: 243 [2020-10-23 21:50:00,564 INFO L226 Difference]: Without dead ends: 236 [2020-10-23 21:50:00,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5042 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=8820, Invalid=19236, Unknown=0, NotChecked=0, Total=28056 [2020-10-23 21:50:00,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-23 21:50:00,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 233. [2020-10-23 21:50:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-23 21:50:00,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2020-10-23 21:50:00,575 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 227 [2020-10-23 21:50:00,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:50:00,575 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2020-10-23 21:50:00,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-23 21:50:00,575 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2020-10-23 21:50:00,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-23 21:50:00,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:50:00,577 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:50:00,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-23 21:50:00,584 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:50:00,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:50:00,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1435910972, now seen corresponding path program 42 times [2020-10-23 21:50:00,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:50:00,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841182899] [2020-10-23 21:50:00,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:50:00,722 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:50:00,723 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:50:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:05,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:50:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:50:05,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841182899] [2020-10-23 21:50:05,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:50:05,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2020-10-23 21:50:05,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542650560] [2020-10-23 21:50:05,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-23 21:50:05,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:50:05,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-23 21:50:05,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-10-23 21:50:05,625 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 88 states. [2020-10-23 21:50:13,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:50:13,095 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2020-10-23 21:50:13,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-10-23 21:50:13,096 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 232 [2020-10-23 21:50:13,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:50:13,099 INFO L225 Difference]: With dead ends: 248 [2020-10-23 21:50:13,099 INFO L226 Difference]: Without dead ends: 241 [2020-10-23 21:50:13,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-10-23 21:50:13,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-23 21:50:13,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 238. [2020-10-23 21:50:13,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-23 21:50:13,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2020-10-23 21:50:13,109 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 232 [2020-10-23 21:50:13,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:50:13,109 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2020-10-23 21:50:13,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-23 21:50:13,109 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2020-10-23 21:50:13,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-23 21:50:13,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:50:13,111 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:50:13,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-23 21:50:13,111 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:50:13,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:50:13,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1461197132, now seen corresponding path program 43 times [2020-10-23 21:50:13,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:50:13,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160195191] [2020-10-23 21:50:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:50:13,257 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:50:13,258 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:50:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:18,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:50:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:50:18,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160195191] [2020-10-23 21:50:18,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:50:18,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2020-10-23 21:50:18,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000976783] [2020-10-23 21:50:18,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-10-23 21:50:18,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:50:18,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-10-23 21:50:18,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2020-10-23 21:50:18,368 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand 90 states. [2020-10-23 21:50:26,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:50:26,554 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2020-10-23 21:50:26,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-10-23 21:50:26,555 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 237 [2020-10-23 21:50:26,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:50:26,558 INFO L225 Difference]: With dead ends: 253 [2020-10-23 21:50:26,558 INFO L226 Difference]: Without dead ends: 246 [2020-10-23 21:50:26,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=9680, Invalid=21120, Unknown=0, NotChecked=0, Total=30800 [2020-10-23 21:50:26,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-23 21:50:26,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-10-23 21:50:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-23 21:50:26,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2020-10-23 21:50:26,579 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 237 [2020-10-23 21:50:26,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:50:26,580 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2020-10-23 21:50:26,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-10-23 21:50:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2020-10-23 21:50:26,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-23 21:50:26,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:50:26,581 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:50:26,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-23 21:50:26,582 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:50:26,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:50:26,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1293308356, now seen corresponding path program 44 times [2020-10-23 21:50:26,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:50:26,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888369512] [2020-10-23 21:50:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:50:26,730 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:50:26,732 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:50:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:32,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:50:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:50:32,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888369512] [2020-10-23 21:50:32,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:50:32,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2020-10-23 21:50:32,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839636078] [2020-10-23 21:50:32,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-10-23 21:50:32,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:50:32,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-10-23 21:50:32,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-10-23 21:50:32,161 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 92 states. [2020-10-23 21:50:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:50:40,818 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2020-10-23 21:50:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-10-23 21:50:40,819 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 242 [2020-10-23 21:50:40,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:50:40,822 INFO L225 Difference]: With dead ends: 258 [2020-10-23 21:50:40,822 INFO L226 Difference]: Without dead ends: 251 [2020-10-23 21:50:40,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-10-23 21:50:40,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-23 21:50:40,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 248. [2020-10-23 21:50:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-23 21:50:40,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2020-10-23 21:50:40,833 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 242 [2020-10-23 21:50:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:50:40,833 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2020-10-23 21:50:40,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-10-23 21:50:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2020-10-23 21:50:40,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-23 21:50:40,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:50:40,835 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:50:40,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-23 21:50:40,835 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:50:40,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:50:40,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1040145332, now seen corresponding path program 45 times [2020-10-23 21:50:40,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:50:40,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577586068] [2020-10-23 21:50:40,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:50:40,987 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:50:40,988 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:50:41,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:46,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:50:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:50:46,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577586068] [2020-10-23 21:50:46,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:50:46,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2020-10-23 21:50:46,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860978868] [2020-10-23 21:50:46,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-10-23 21:50:46,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:50:46,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-10-23 21:50:46,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2020-10-23 21:50:46,777 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 94 states. [2020-10-23 21:50:56,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:50:56,159 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2020-10-23 21:50:56,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-10-23 21:50:56,160 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 247 [2020-10-23 21:50:56,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:50:56,162 INFO L225 Difference]: With dead ends: 263 [2020-10-23 21:50:56,162 INFO L226 Difference]: Without dead ends: 256 [2020-10-23 21:50:56,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=10580, Invalid=23092, Unknown=0, NotChecked=0, Total=33672 [2020-10-23 21:50:56,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-23 21:50:56,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 253. [2020-10-23 21:50:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-23 21:50:56,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2020-10-23 21:50:56,172 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 247 [2020-10-23 21:50:56,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:50:56,173 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2020-10-23 21:50:56,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-10-23 21:50:56,173 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2020-10-23 21:50:56,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-23 21:50:56,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:50:56,185 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:50:56,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-23 21:50:56,185 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:50:56,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:50:56,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1530091836, now seen corresponding path program 46 times [2020-10-23 21:50:56,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:50:56,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325136056] [2020-10-23 21:50:56,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:50:56,337 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:50:56,339 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:50:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:02,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:51:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:51:02,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325136056] [2020-10-23 21:51:02,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:51:02,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2020-10-23 21:51:02,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827688363] [2020-10-23 21:51:02,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-10-23 21:51:02,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:51:02,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-10-23 21:51:02,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-10-23 21:51:02,647 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 96 states. [2020-10-23 21:51:12,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:51:12,350 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2020-10-23 21:51:12,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2020-10-23 21:51:12,351 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 252 [2020-10-23 21:51:12,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:51:12,354 INFO L225 Difference]: With dead ends: 268 [2020-10-23 21:51:12,354 INFO L226 Difference]: Without dead ends: 261 [2020-10-23 21:51:12,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-10-23 21:51:12,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-23 21:51:12,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2020-10-23 21:51:12,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-23 21:51:12,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 258 transitions. [2020-10-23 21:51:12,365 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 258 transitions. Word has length 252 [2020-10-23 21:51:12,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:51:12,366 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 258 transitions. [2020-10-23 21:51:12,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-10-23 21:51:12,366 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 258 transitions. [2020-10-23 21:51:12,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-23 21:51:12,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:51:12,367 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:51:12,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-23 21:51:12,368 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:51:12,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:51:12,368 INFO L82 PathProgramCache]: Analyzing trace with hash 671649972, now seen corresponding path program 47 times [2020-10-23 21:51:12,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:51:12,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246568522] [2020-10-23 21:51:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:51:12,542 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:51:12,543 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:51:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:19,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:51:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:51:19,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246568522] [2020-10-23 21:51:19,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:51:19,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2020-10-23 21:51:19,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574267974] [2020-10-23 21:51:19,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-10-23 21:51:19,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:51:19,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-10-23 21:51:19,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2020-10-23 21:51:19,337 INFO L87 Difference]: Start difference. First operand 258 states and 258 transitions. Second operand 98 states. [2020-10-23 21:51:29,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:51:29,970 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2020-10-23 21:51:29,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-10-23 21:51:29,971 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 257 [2020-10-23 21:51:29,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:51:29,973 INFO L225 Difference]: With dead ends: 273 [2020-10-23 21:51:29,973 INFO L226 Difference]: Without dead ends: 266 [2020-10-23 21:51:29,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=11520, Invalid=25152, Unknown=0, NotChecked=0, Total=36672 [2020-10-23 21:51:29,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-23 21:51:29,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 263. [2020-10-23 21:51:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-23 21:51:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2020-10-23 21:51:29,982 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 257 [2020-10-23 21:51:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:51:29,982 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2020-10-23 21:51:29,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-10-23 21:51:29,983 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2020-10-23 21:51:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-23 21:51:29,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:51:29,984 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:51:29,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-23 21:51:29,984 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:51:29,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:51:29,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1079819204, now seen corresponding path program 48 times [2020-10-23 21:51:29,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:51:29,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592769098] [2020-10-23 21:51:29,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:51:30,145 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:51:30,146 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:51:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:37,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:51:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:51:37,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592769098] [2020-10-23 21:51:37,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:51:37,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2020-10-23 21:51:37,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616227783] [2020-10-23 21:51:37,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-10-23 21:51:37,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:51:37,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-10-23 21:51:37,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-10-23 21:51:37,298 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 100 states. [2020-10-23 21:51:48,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:51:48,265 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2020-10-23 21:51:48,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-10-23 21:51:48,266 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 262 [2020-10-23 21:51:48,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:51:48,268 INFO L225 Difference]: With dead ends: 278 [2020-10-23 21:51:48,269 INFO L226 Difference]: Without dead ends: 271 [2020-10-23 21:51:48,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-10-23 21:51:48,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-23 21:51:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 268. [2020-10-23 21:51:48,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-23 21:51:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2020-10-23 21:51:48,277 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 262 [2020-10-23 21:51:48,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:51:48,278 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2020-10-23 21:51:48,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-10-23 21:51:48,278 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2020-10-23 21:51:48,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-23 21:51:48,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:51:48,280 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:51:48,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-23 21:51:48,280 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:51:48,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:51:48,280 INFO L82 PathProgramCache]: Analyzing trace with hash 869500340, now seen corresponding path program 49 times [2020-10-23 21:51:48,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:51:48,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663591810] [2020-10-23 21:51:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:51:48,434 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:51:48,436 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:51:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:55,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:51:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:51:55,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663591810] [2020-10-23 21:51:55,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:51:55,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2020-10-23 21:51:55,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672762948] [2020-10-23 21:51:55,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-10-23 21:51:55,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:51:55,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-10-23 21:51:55,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2020-10-23 21:51:55,991 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 102 states. [2020-10-23 21:52:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:52:07,870 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2020-10-23 21:52:07,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-10-23 21:52:07,871 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 267 [2020-10-23 21:52:07,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:52:07,873 INFO L225 Difference]: With dead ends: 283 [2020-10-23 21:52:07,873 INFO L226 Difference]: Without dead ends: 276 [2020-10-23 21:52:07,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=12500, Invalid=27300, Unknown=0, NotChecked=0, Total=39800 [2020-10-23 21:52:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-23 21:52:07,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 273. [2020-10-23 21:52:07,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-23 21:52:07,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2020-10-23 21:52:07,888 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 267 [2020-10-23 21:52:07,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:52:07,888 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2020-10-23 21:52:07,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-10-23 21:52:07,888 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2020-10-23 21:52:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-23 21:52:07,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:52:07,890 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:52:07,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-23 21:52:07,890 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:52:07,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:52:07,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1788252356, now seen corresponding path program 50 times [2020-10-23 21:52:07,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:52:07,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21806286] [2020-10-23 21:52:07,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:52:08,054 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:52:08,055 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:52:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:15,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:52:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:52:15,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21806286] [2020-10-23 21:52:15,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:52:15,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2020-10-23 21:52:15,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538030289] [2020-10-23 21:52:15,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-10-23 21:52:15,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:52:15,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-10-23 21:52:15,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-10-23 21:52:15,931 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand 104 states. [2020-10-23 21:52:28,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:52:28,234 INFO L93 Difference]: Finished difference Result 288 states and 288 transitions. [2020-10-23 21:52:28,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2020-10-23 21:52:28,236 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 272 [2020-10-23 21:52:28,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:52:28,238 INFO L225 Difference]: With dead ends: 288 [2020-10-23 21:52:28,238 INFO L226 Difference]: Without dead ends: 281 [2020-10-23 21:52:28,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-10-23 21:52:28,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-23 21:52:28,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 278. [2020-10-23 21:52:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-23 21:52:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 278 transitions. [2020-10-23 21:52:28,249 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 278 transitions. Word has length 272 [2020-10-23 21:52:28,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:52:28,250 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 278 transitions. [2020-10-23 21:52:28,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-10-23 21:52:28,250 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 278 transitions. [2020-10-23 21:52:28,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-23 21:52:28,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:52:28,252 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:52:28,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-23 21:52:28,252 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:52:28,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:52:28,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1781545652, now seen corresponding path program 51 times [2020-10-23 21:52:28,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:52:28,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898485821] [2020-10-23 21:52:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:52:28,445 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:52:28,446 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:52:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:36,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:52:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:52:36,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898485821] [2020-10-23 21:52:36,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:52:36,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2020-10-23 21:52:36,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773153761] [2020-10-23 21:52:36,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-10-23 21:52:36,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:52:36,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-10-23 21:52:36,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2020-10-23 21:52:36,883 INFO L87 Difference]: Start difference. First operand 278 states and 278 transitions. Second operand 106 states. [2020-10-23 21:52:50,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:52:50,543 INFO L93 Difference]: Finished difference Result 293 states and 293 transitions. [2020-10-23 21:52:50,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-10-23 21:52:50,545 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 277 [2020-10-23 21:52:50,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:52:50,547 INFO L225 Difference]: With dead ends: 293 [2020-10-23 21:52:50,547 INFO L226 Difference]: Without dead ends: 286 [2020-10-23 21:52:50,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=13520, Invalid=29536, Unknown=0, NotChecked=0, Total=43056 [2020-10-23 21:52:50,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-23 21:52:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 283. [2020-10-23 21:52:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-23 21:52:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2020-10-23 21:52:50,558 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 277 [2020-10-23 21:52:50,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:52:50,558 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2020-10-23 21:52:50,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-10-23 21:52:50,559 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2020-10-23 21:52:50,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-10-23 21:52:50,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:52:50,560 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:52:50,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-23 21:52:50,560 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:52:50,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:52:50,561 INFO L82 PathProgramCache]: Analyzing trace with hash -709502404, now seen corresponding path program 52 times [2020-10-23 21:52:50,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:52:50,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642972427] [2020-10-23 21:52:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:52:50,722 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:52:50,723 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:52:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:59,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:52:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:52:59,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642972427] [2020-10-23 21:52:59,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:52:59,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2020-10-23 21:52:59,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488908864] [2020-10-23 21:52:59,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-10-23 21:52:59,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:52:59,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-10-23 21:52:59,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2020-10-23 21:52:59,928 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 108 states. [2020-10-23 21:53:14,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:53:14,441 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2020-10-23 21:53:14,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2020-10-23 21:53:14,443 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 282 [2020-10-23 21:53:14,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:53:14,445 INFO L225 Difference]: With dead ends: 298 [2020-10-23 21:53:14,445 INFO L226 Difference]: Without dead ends: 291 [2020-10-23 21:53:14,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=14045, Invalid=30687, Unknown=0, NotChecked=0, Total=44732 [2020-10-23 21:53:14,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-23 21:53:14,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 288. [2020-10-23 21:53:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-23 21:53:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 288 transitions. [2020-10-23 21:53:14,453 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 288 transitions. Word has length 282 [2020-10-23 21:53:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:53:14,454 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 288 transitions. [2020-10-23 21:53:14,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-10-23 21:53:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 288 transitions. [2020-10-23 21:53:14,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-10-23 21:53:14,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:53:14,455 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:53:14,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-23 21:53:14,455 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:53:14,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:53:14,456 INFO L82 PathProgramCache]: Analyzing trace with hash 267300788, now seen corresponding path program 53 times [2020-10-23 21:53:14,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:53:14,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391378729] [2020-10-23 21:53:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:53:14,621 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:53:14,622 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:53:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:24,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:53:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:53:24,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391378729] [2020-10-23 21:53:24,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:53:24,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2020-10-23 21:53:24,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327151473] [2020-10-23 21:53:24,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-10-23 21:53:24,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:53:24,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-10-23 21:53:24,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2020-10-23 21:53:24,543 INFO L87 Difference]: Start difference. First operand 288 states and 288 transitions. Second operand 110 states. [2020-10-23 21:53:40,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:53:40,318 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2020-10-23 21:53:40,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-10-23 21:53:40,319 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 287 [2020-10-23 21:53:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:53:40,322 INFO L225 Difference]: With dead ends: 303 [2020-10-23 21:53:40,322 INFO L226 Difference]: Without dead ends: 296 [2020-10-23 21:53:40,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8426 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=14580, Invalid=31860, Unknown=0, NotChecked=0, Total=46440 [2020-10-23 21:53:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-23 21:53:40,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 293. [2020-10-23 21:53:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-23 21:53:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2020-10-23 21:53:40,332 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 287 [2020-10-23 21:53:40,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:53:40,333 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2020-10-23 21:53:40,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-10-23 21:53:40,333 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2020-10-23 21:53:40,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-10-23 21:53:40,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:53:40,335 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:53:40,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-23 21:53:40,335 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:53:40,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:53:40,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1111980740, now seen corresponding path program 54 times [2020-10-23 21:53:40,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:53:40,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970920342] [2020-10-23 21:53:40,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:53:40,519 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:53:40,520 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:53:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:51,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:53:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:53:51,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970920342] [2020-10-23 21:53:51,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:53:51,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2020-10-23 21:53:51,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586195576] [2020-10-23 21:53:51,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-10-23 21:53:51,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:53:51,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-10-23 21:53:51,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2020-10-23 21:53:51,258 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 112 states. [2020-10-23 21:54:08,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:54:08,159 INFO L93 Difference]: Finished difference Result 308 states and 308 transitions. [2020-10-23 21:54:08,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-10-23 21:54:08,160 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 292 [2020-10-23 21:54:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:54:08,162 INFO L225 Difference]: With dead ends: 308 [2020-10-23 21:54:08,162 INFO L226 Difference]: Without dead ends: 301 [2020-10-23 21:54:08,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8747 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=15125, Invalid=33055, Unknown=0, NotChecked=0, Total=48180 [2020-10-23 21:54:08,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-23 21:54:08,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 298. [2020-10-23 21:54:08,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-23 21:54:08,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 298 transitions. [2020-10-23 21:54:08,174 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 298 transitions. Word has length 292 [2020-10-23 21:54:08,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:54:08,175 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 298 transitions. [2020-10-23 21:54:08,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-10-23 21:54:08,175 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 298 transitions. [2020-10-23 21:54:08,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-10-23 21:54:08,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:54:08,177 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:54:08,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-23 21:54:08,177 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:54:08,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:54:08,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1512119116, now seen corresponding path program 55 times [2020-10-23 21:54:08,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:54:08,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669582141] [2020-10-23 21:54:08,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:54:08,390 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:54:08,391 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:54:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:19,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:54:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:54:19,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669582141] [2020-10-23 21:54:19,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:54:19,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2020-10-23 21:54:19,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633857611] [2020-10-23 21:54:19,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-10-23 21:54:19,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:54:19,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-10-23 21:54:19,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2020-10-23 21:54:19,998 INFO L87 Difference]: Start difference. First operand 298 states and 298 transitions. Second operand 114 states. [2020-10-23 21:54:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:54:38,034 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2020-10-23 21:54:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-10-23 21:54:38,036 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 297 [2020-10-23 21:54:38,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:54:38,038 INFO L225 Difference]: With dead ends: 313 [2020-10-23 21:54:38,038 INFO L226 Difference]: Without dead ends: 306 [2020-10-23 21:54:38,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9074 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=15680, Invalid=34272, Unknown=0, NotChecked=0, Total=49952 [2020-10-23 21:54:38,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-23 21:54:38,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 303. [2020-10-23 21:54:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-23 21:54:38,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2020-10-23 21:54:38,047 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 297 [2020-10-23 21:54:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:54:38,047 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2020-10-23 21:54:38,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-10-23 21:54:38,048 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2020-10-23 21:54:38,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-23 21:54:38,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:54:38,049 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:54:38,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-23 21:54:38,049 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:54:38,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:54:38,049 INFO L82 PathProgramCache]: Analyzing trace with hash -828280772, now seen corresponding path program 56 times [2020-10-23 21:54:38,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:54:38,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460703518] [2020-10-23 21:54:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:54:38,236 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:54:38,238 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:54:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:50,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:54:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:54:50,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460703518] [2020-10-23 21:54:50,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:54:50,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2020-10-23 21:54:50,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577567107] [2020-10-23 21:54:50,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-10-23 21:54:50,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:54:50,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-10-23 21:54:50,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2020-10-23 21:54:50,883 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand 116 states. [2020-10-23 21:55:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:55:10,699 INFO L93 Difference]: Finished difference Result 318 states and 318 transitions. [2020-10-23 21:55:10,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-10-23 21:55:10,701 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 302 [2020-10-23 21:55:10,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:55:10,703 INFO L225 Difference]: With dead ends: 318 [2020-10-23 21:55:10,703 INFO L226 Difference]: Without dead ends: 311 [2020-10-23 21:55:10,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=16245, Invalid=35511, Unknown=0, NotChecked=0, Total=51756 [2020-10-23 21:55:10,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-23 21:55:10,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 308. [2020-10-23 21:55:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-23 21:55:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 308 transitions. [2020-10-23 21:55:10,712 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 308 transitions. Word has length 302 [2020-10-23 21:55:10,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:55:10,716 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 308 transitions. [2020-10-23 21:55:10,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-10-23 21:55:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 308 transitions. [2020-10-23 21:55:10,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-23 21:55:10,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:55:10,718 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:55:10,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-23 21:55:10,719 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:55:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:55:10,719 INFO L82 PathProgramCache]: Analyzing trace with hash -388965964, now seen corresponding path program 57 times [2020-10-23 21:55:10,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:55:10,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174394545] [2020-10-23 21:55:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:55:10,916 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:55:10,918 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:55:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:55:24,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:55:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:55:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:55:24,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174394545] [2020-10-23 21:55:24,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:55:24,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2020-10-23 21:55:24,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770506049] [2020-10-23 21:55:24,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-10-23 21:55:24,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:55:24,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-10-23 21:55:24,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2020-10-23 21:55:24,284 INFO L87 Difference]: Start difference. First operand 308 states and 308 transitions. Second operand 118 states. [2020-10-23 21:55:45,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:55:45,665 INFO L93 Difference]: Finished difference Result 323 states and 323 transitions. [2020-10-23 21:55:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2020-10-23 21:55:45,667 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 307 [2020-10-23 21:55:45,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:55:45,669 INFO L225 Difference]: With dead ends: 323 [2020-10-23 21:55:45,669 INFO L226 Difference]: Without dead ends: 316 [2020-10-23 21:55:45,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9746 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=16820, Invalid=36772, Unknown=0, NotChecked=0, Total=53592 [2020-10-23 21:55:45,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-23 21:55:45,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 313. [2020-10-23 21:55:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-23 21:55:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 313 transitions. [2020-10-23 21:55:45,681 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 313 transitions. Word has length 307 [2020-10-23 21:55:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:55:45,681 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 313 transitions. [2020-10-23 21:55:45,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-10-23 21:55:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 313 transitions. [2020-10-23 21:55:45,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-23 21:55:45,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:55:45,684 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:55:45,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-23 21:55:45,684 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:55:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:55:45,684 INFO L82 PathProgramCache]: Analyzing trace with hash -845112516, now seen corresponding path program 58 times [2020-10-23 21:55:45,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:55:45,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835980116] [2020-10-23 21:55:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:55:45,911 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:55:45,912 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:55:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:56:00,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:56:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:56:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:56:00,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835980116] [2020-10-23 21:56:00,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:56:00,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2020-10-23 21:56:00,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640516944] [2020-10-23 21:56:00,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-10-23 21:56:00,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:56:00,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-10-23 21:56:00,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2020-10-23 21:56:00,862 INFO L87 Difference]: Start difference. First operand 313 states and 313 transitions. Second operand 120 states. [2020-10-23 21:56:23,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:56:23,616 INFO L93 Difference]: Finished difference Result 328 states and 328 transitions. [2020-10-23 21:56:23,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-10-23 21:56:23,618 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 312 [2020-10-23 21:56:23,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:56:23,621 INFO L225 Difference]: With dead ends: 328 [2020-10-23 21:56:23,621 INFO L226 Difference]: Without dead ends: 321 [2020-10-23 21:56:23,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=17405, Invalid=38055, Unknown=0, NotChecked=0, Total=55460 [2020-10-23 21:56:23,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-23 21:56:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2020-10-23 21:56:23,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-23 21:56:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 318 transitions. [2020-10-23 21:56:23,631 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 318 transitions. Word has length 312 [2020-10-23 21:56:23,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:56:23,631 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 318 transitions. [2020-10-23 21:56:23,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-10-23 21:56:23,631 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 318 transitions. [2020-10-23 21:56:23,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-23 21:56:23,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:56:23,632 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:56:23,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-23 21:56:23,633 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:56:23,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:56:23,633 INFO L82 PathProgramCache]: Analyzing trace with hash -778793292, now seen corresponding path program 59 times [2020-10-23 21:56:23,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:56:23,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778669120] [2020-10-23 21:56:23,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:56:23,859 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:56:23,860 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:56:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:56:39,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:56:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:56:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:56:39,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778669120] [2020-10-23 21:56:39,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:56:39,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2020-10-23 21:56:39,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944650938] [2020-10-23 21:56:39,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 122 states [2020-10-23 21:56:39,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:56:39,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2020-10-23 21:56:39,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3722, Invalid=11040, Unknown=0, NotChecked=0, Total=14762 [2020-10-23 21:56:39,776 INFO L87 Difference]: Start difference. First operand 318 states and 318 transitions. Second operand 122 states. [2020-10-23 21:57:04,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:57:04,544 INFO L93 Difference]: Finished difference Result 333 states and 333 transitions. [2020-10-23 21:57:04,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2020-10-23 21:57:04,547 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 317 [2020-10-23 21:57:04,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:57:04,550 INFO L225 Difference]: With dead ends: 333 [2020-10-23 21:57:04,550 INFO L226 Difference]: Without dead ends: 326 [2020-10-23 21:57:04,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10442 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=18000, Invalid=39360, Unknown=0, NotChecked=0, Total=57360 [2020-10-23 21:57:04,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-23 21:57:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 323. [2020-10-23 21:57:04,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-23 21:57:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2020-10-23 21:57:04,559 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 317 [2020-10-23 21:57:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:57:04,559 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2020-10-23 21:57:04,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 122 states. [2020-10-23 21:57:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2020-10-23 21:57:04,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-23 21:57:04,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:57:04,561 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:57:04,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-23 21:57:04,562 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:57:04,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:57:04,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1008335300, now seen corresponding path program 60 times [2020-10-23 21:57:04,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:57:04,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729275378] [2020-10-23 21:57:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:57:04,805 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:57:04,806 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:57:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:21,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:57:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:57:22,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729275378] [2020-10-23 21:57:22,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:57:22,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2020-10-23 21:57:22,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953098527] [2020-10-23 21:57:22,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 124 states [2020-10-23 21:57:22,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:57:22,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2020-10-23 21:57:22,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3845, Invalid=11407, Unknown=0, NotChecked=0, Total=15252 [2020-10-23 21:57:22,022 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 124 states. [2020-10-23 21:57:48,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:57:48,791 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2020-10-23 21:57:48,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2020-10-23 21:57:48,794 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 322 [2020-10-23 21:57:48,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:57:48,796 INFO L225 Difference]: With dead ends: 338 [2020-10-23 21:57:48,797 INFO L226 Difference]: Without dead ends: 331 [2020-10-23 21:57:48,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10799 ImplicationChecksByTransitivity, 41.4s TimeCoverageRelationStatistics Valid=18605, Invalid=40687, Unknown=0, NotChecked=0, Total=59292 [2020-10-23 21:57:48,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-23 21:57:48,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 328. [2020-10-23 21:57:48,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-23 21:57:48,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2020-10-23 21:57:48,810 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 322 [2020-10-23 21:57:48,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:57:48,811 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2020-10-23 21:57:48,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 124 states. [2020-10-23 21:57:48,811 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2020-10-23 21:57:48,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-23 21:57:48,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:57:48,813 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:57:48,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-23 21:57:48,813 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:57:48,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:57:48,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1795554380, now seen corresponding path program 61 times [2020-10-23 21:57:48,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:57:48,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336167289] [2020-10-23 21:57:48,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:57:49,092 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:57:49,094 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:57:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:07,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:58:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:58:07,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336167289] [2020-10-23 21:58:07,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:58:07,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2020-10-23 21:58:07,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86695026] [2020-10-23 21:58:07,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 126 states [2020-10-23 21:58:07,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:58:07,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2020-10-23 21:58:07,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3970, Invalid=11780, Unknown=0, NotChecked=0, Total=15750 [2020-10-23 21:58:07,800 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 126 states. [2020-10-23 21:58:35,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:58:35,758 INFO L93 Difference]: Finished difference Result 343 states and 343 transitions. [2020-10-23 21:58:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2020-10-23 21:58:35,762 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 327 [2020-10-23 21:58:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:58:35,764 INFO L225 Difference]: With dead ends: 343 [2020-10-23 21:58:35,764 INFO L226 Difference]: Without dead ends: 336 [2020-10-23 21:58:35,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11162 ImplicationChecksByTransitivity, 44.8s TimeCoverageRelationStatistics Valid=19220, Invalid=42036, Unknown=0, NotChecked=0, Total=61256 [2020-10-23 21:58:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-23 21:58:35,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 333. [2020-10-23 21:58:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-23 21:58:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 333 transitions. [2020-10-23 21:58:35,774 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 333 transitions. Word has length 327 [2020-10-23 21:58:35,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:58:35,774 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 333 transitions. [2020-10-23 21:58:35,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 126 states. [2020-10-23 21:58:35,774 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 333 transitions. [2020-10-23 21:58:35,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-10-23 21:58:35,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:58:35,776 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:58:35,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-23 21:58:35,777 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:58:35,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:58:35,777 INFO L82 PathProgramCache]: Analyzing trace with hash -22957764, now seen corresponding path program 62 times [2020-10-23 21:58:35,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:58:35,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248238815] [2020-10-23 21:58:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:58:36,045 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:58:36,047 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:58:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:55,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:58:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:58:56,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248238815] [2020-10-23 21:58:56,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:58:56,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2020-10-23 21:58:56,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90720219] [2020-10-23 21:58:56,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 128 states [2020-10-23 21:58:56,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:58:56,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2020-10-23 21:58:56,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=12159, Unknown=0, NotChecked=0, Total=16256 [2020-10-23 21:58:56,024 INFO L87 Difference]: Start difference. First operand 333 states and 333 transitions. Second operand 128 states. [2020-10-23 21:59:27,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:59:27,108 INFO L93 Difference]: Finished difference Result 348 states and 348 transitions. [2020-10-23 21:59:27,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2020-10-23 21:59:27,111 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 332 [2020-10-23 21:59:27,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:59:27,114 INFO L225 Difference]: With dead ends: 348 [2020-10-23 21:59:27,115 INFO L226 Difference]: Without dead ends: 341 [2020-10-23 21:59:27,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11531 ImplicationChecksByTransitivity, 47.9s TimeCoverageRelationStatistics Valid=19845, Invalid=43407, Unknown=0, NotChecked=0, Total=63252 [2020-10-23 21:59:27,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-23 21:59:27,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 338. [2020-10-23 21:59:27,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-23 21:59:27,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 338 transitions. [2020-10-23 21:59:27,126 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 338 transitions. Word has length 332 [2020-10-23 21:59:27,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:59:27,127 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 338 transitions. [2020-10-23 21:59:27,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 128 states. [2020-10-23 21:59:27,127 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 338 transitions. [2020-10-23 21:59:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-23 21:59:27,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:59:27,129 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:59:27,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-23 21:59:27,129 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:59:27,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:59:27,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1546569548, now seen corresponding path program 63 times [2020-10-23 21:59:27,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:59:27,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758694595] [2020-10-23 21:59:27,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:59:27,408 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:59:27,409 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:59:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:48,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:59:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:59:49,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758694595] [2020-10-23 21:59:49,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:59:49,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2020-10-23 21:59:49,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588262882] [2020-10-23 21:59:49,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 130 states [2020-10-23 21:59:49,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:59:49,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2020-10-23 21:59:49,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4226, Invalid=12544, Unknown=0, NotChecked=0, Total=16770 [2020-10-23 21:59:49,056 INFO L87 Difference]: Start difference. First operand 338 states and 338 transitions. Second operand 130 states.