/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/loops-crafted-1/sumt4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:11:51,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:11:51,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:11:51,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 02:11:51,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 02:11:51,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 02:11:51,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 02:11:51,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 02:11:51,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 02:11:51,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 02:11:51,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 02:11:51,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 02:11:51,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 02:11:51,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 02:11:51,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 02:11:51,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 02:11:51,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 02:11:51,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:11:51,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:11:51,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:11:51,483 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 02:11:51,498 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:11:51,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:11:51,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:11:51,501 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:11:51,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:11:51,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:11:51,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:11:51,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:11:51,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:11:51,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:11:51,503 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:11:51,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:11:51,504 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:11:51,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:11:51,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:11:51,505 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:11:51,505 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:11:51,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:11:51,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:11:51,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:11:51,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:11:51,508 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:11:51,509 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:11:51,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:11:51,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:11:51,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:11:51,967 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:11:51,967 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:11:51,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-11-07 02:11:52,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb98b6a8b/3df5650bc1fa4ca6813ba8db4fce8c1f/FLAG597e2c4b3 [2020-11-07 02:11:52,705 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:11:52,705 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-11-07 02:11:52,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb98b6a8b/3df5650bc1fa4ca6813ba8db4fce8c1f/FLAG597e2c4b3 [2020-11-07 02:11:53,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb98b6a8b/3df5650bc1fa4ca6813ba8db4fce8c1f [2020-11-07 02:11:53,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:11:53,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:11:53,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:11:53,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:11:53,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:11:53,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dc2d705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53, skipping insertion in model container [2020-11-07 02:11:53,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:11:53,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:11:53,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:11:53,278 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:11:53,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:11:53,316 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:11:53,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53 WrapperNode [2020-11-07 02:11:53,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:11:53,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:11:53,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:11:53,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:11:53,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (1/1) ... [2020-11-07 02:11:53,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:11:53,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:11:53,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:11:53,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:11:53,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (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 [2020-11-07 02:11:53,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:11:53,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:11:53,438 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:11:53,438 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 02:11:53,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 02:11:53,439 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:11:53,439 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:11:53,439 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:11:53,439 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:11:53,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:11:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 02:11:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:11:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 02:11:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:11:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:11:53,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:11:53,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:11:53,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:11:53,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:11:53,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:11:53,762 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:11:53,762 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 02:11:53,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:11:53 BoogieIcfgContainer [2020-11-07 02:11:53,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:11:53,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:11:53,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:11:53,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:11:53,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:11:53" (1/3) ... [2020-11-07 02:11:53,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10adc074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:11:53, skipping insertion in model container [2020-11-07 02:11:53,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:53" (2/3) ... [2020-11-07 02:11:53,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10adc074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:11:53, skipping insertion in model container [2020-11-07 02:11:53,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:11:53" (3/3) ... [2020-11-07 02:11:53,776 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt4.c [2020-11-07 02:11:53,797 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:11:53,802 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:11:53,817 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:11:53,844 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:11:53,845 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:11:53,845 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:11:53,845 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:11:53,845 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:11:53,845 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:11:53,846 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:11:53,846 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:11:53,864 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-11-07 02:11:53,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-07 02:11:53,874 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:53,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:11:53,877 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:53,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:53,884 INFO L82 PathProgramCache]: Analyzing trace with hash -2124698403, now seen corresponding path program 1 times [2020-11-07 02:11:53,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:53,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146572490] [2020-11-07 02:11:53,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:53,980 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:54,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:54,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146572490] [2020-11-07 02:11:54,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:54,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 02:11:54,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68674972] [2020-11-07 02:11:54,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 02:11:54,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:54,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 02:11:54,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 02:11:54,403 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 3 states. [2020-11-07 02:11:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:54,511 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-11-07 02:11:54,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 02:11:54,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-11-07 02:11:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:54,524 INFO L225 Difference]: With dead ends: 61 [2020-11-07 02:11:54,524 INFO L226 Difference]: Without dead ends: 37 [2020-11-07 02:11:54,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 02:11:54,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-07 02:11:54,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-07 02:11:54,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-07 02:11:54,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-11-07 02:11:54,588 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 28 [2020-11-07 02:11:54,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:54,588 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-11-07 02:11:54,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 02:11:54,589 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-11-07 02:11:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-07 02:11:54,590 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:54,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:11:54,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:11:54,591 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:54,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:54,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1454540118, now seen corresponding path program 1 times [2020-11-07 02:11:54,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:54,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270624740] [2020-11-07 02:11:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:54,600 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:55,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:55,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270624740] [2020-11-07 02:11:55,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:55,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 02:11:55,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749334911] [2020-11-07 02:11:55,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 02:11:55,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:55,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 02:11:55,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-11-07 02:11:55,115 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 10 states. [2020-11-07 02:11:55,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:55,651 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2020-11-07 02:11:55,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 02:11:55,652 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-11-07 02:11:55,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:55,655 INFO L225 Difference]: With dead ends: 89 [2020-11-07 02:11:55,655 INFO L226 Difference]: Without dead ends: 71 [2020-11-07 02:11:55,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-11-07 02:11:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-07 02:11:55,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 39. [2020-11-07 02:11:55,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-07 02:11:55,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-11-07 02:11:55,675 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 28 [2020-11-07 02:11:55,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:55,676 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-11-07 02:11:55,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 02:11:55,676 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-11-07 02:11:55,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-07 02:11:55,677 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:55,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:11:55,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:11:55,678 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:55,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:55,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1716557418, now seen corresponding path program 1 times [2020-11-07 02:11:55,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:55,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218779417] [2020-11-07 02:11:55,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:57,827 WARN L194 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:11:58,596 WARN L194 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:11:58,610 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:58,613 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:58,936 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-11-07 02:11:59,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:59,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218779417] [2020-11-07 02:11:59,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:59,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 02:11:59,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108488179] [2020-11-07 02:11:59,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 02:11:59,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:59,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 02:11:59,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-11-07 02:11:59,103 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 14 states. [2020-11-07 02:12:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:01,798 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-11-07 02:12:01,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 02:12:01,799 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-11-07 02:12:01,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:01,800 INFO L225 Difference]: With dead ends: 55 [2020-11-07 02:12:01,800 INFO L226 Difference]: Without dead ends: 49 [2020-11-07 02:12:01,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2020-11-07 02:12:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-07 02:12:01,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2020-11-07 02:12:01,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-07 02:12:01,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-11-07 02:12:01,833 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 32 [2020-11-07 02:12:01,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:01,834 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-11-07 02:12:01,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 02:12:01,834 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-11-07 02:12:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 02:12:01,835 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:01,835 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:12:01,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:12:01,836 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:01,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1738014078, now seen corresponding path program 2 times [2020-11-07 02:12:01,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:01,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81154973] [2020-11-07 02:12:01,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:08,031 WARN L194 SmtUtils]: Spent 6.19 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:12:14,204 WARN L194 SmtUtils]: Spent 6.17 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:12:14,880 WARN L194 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:12:16,952 WARN L194 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:12:17,624 WARN L194 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:12:17,630 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:17,635 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:17,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:12:17,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81154973] [2020-11-07 02:12:17,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:17,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:12:17,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274877292] [2020-11-07 02:12:17,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:12:17,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:17,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:12:17,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:12:17,775 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 5 states. [2020-11-07 02:12:18,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:18,020 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-11-07 02:12:18,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:12:18,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-11-07 02:12:18,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:18,021 INFO L225 Difference]: With dead ends: 64 [2020-11-07 02:12:18,021 INFO L226 Difference]: Without dead ends: 49 [2020-11-07 02:12:18,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:12:18,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-07 02:12:18,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-11-07 02:12:18,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-07 02:12:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-11-07 02:12:18,046 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2020-11-07 02:12:18,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:18,047 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-11-07 02:12:18,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:12:18,047 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-11-07 02:12:18,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 02:12:18,049 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:18,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:12:18,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 02:12:18,050 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:18,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:18,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1007706177, now seen corresponding path program 1 times [2020-11-07 02:12:18,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:18,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695299625] [2020-11-07 02:12:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:24,236 WARN L194 SmtUtils]: Spent 6.18 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:12:30,420 WARN L194 SmtUtils]: Spent 6.18 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:12:31,044 WARN L194 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:12:33,119 WARN L194 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:12:35,187 WARN L194 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:12:35,823 WARN L194 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:12:36,736 WARN L194 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2020-11-07 02:12:36,743 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:36,744 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:37,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:12:37,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695299625] [2020-11-07 02:12:37,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:37,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 02:12:37,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024035845] [2020-11-07 02:12:37,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 02:12:37,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:37,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 02:12:37,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-07 02:12:37,062 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 9 states. [2020-11-07 02:12:41,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:41,814 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-11-07 02:12:41,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 02:12:41,815 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-11-07 02:12:41,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:41,817 INFO L225 Difference]: With dead ends: 64 [2020-11-07 02:12:41,817 INFO L226 Difference]: Without dead ends: 49 [2020-11-07 02:12:41,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-11-07 02:12:41,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-07 02:12:41,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-11-07 02:12:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-07 02:12:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-11-07 02:12:41,835 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 37 [2020-11-07 02:12:41,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:41,836 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-11-07 02:12:41,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 02:12:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-11-07 02:12:41,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-07 02:12:41,841 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:41,841 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:12:41,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 02:12:41,841 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:41,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:41,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1709925144, now seen corresponding path program 1 times [2020-11-07 02:12:41,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:41,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673720580] [2020-11-07 02:12:41,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:43,954 WARN L194 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:12:48,117 WARN L194 SmtUtils]: Spent 4.16 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:12:48,770 WARN L194 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:12:50,862 WARN L194 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:12:51,476 WARN L194 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:12:55,651 WARN L194 SmtUtils]: Spent 4.17 s on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 02:12:59,811 WARN L194 SmtUtils]: Spent 4.16 s on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 02:13:00,852 WARN L194 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2020-11-07 02:13:00,855 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:00,857 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:00,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:13:00,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673720580] [2020-11-07 02:13:00,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:00,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:13:00,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210696449] [2020-11-07 02:13:00,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:13:00,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:00,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:13:00,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:13:00,955 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 5 states. [2020-11-07 02:13:01,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:01,187 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-11-07 02:13:01,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:13:01,192 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-11-07 02:13:01,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:01,193 INFO L225 Difference]: With dead ends: 62 [2020-11-07 02:13:01,193 INFO L226 Difference]: Without dead ends: 47 [2020-11-07 02:13:01,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:13:01,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-07 02:13:01,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-07 02:13:01,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-07 02:13:01,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-11-07 02:13:01,222 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 38 [2020-11-07 02:13:01,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:01,222 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-11-07 02:13:01,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:13:01,223 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-11-07 02:13:01,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-07 02:13:01,228 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:01,228 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:13:01,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 02:13:01,228 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:01,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:01,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1515992760, now seen corresponding path program 1 times [2020-11-07 02:13:01,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:01,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596426674] [2020-11-07 02:13:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:07,473 WARN L194 SmtUtils]: Spent 6.24 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:13:11,624 WARN L194 SmtUtils]: Spent 4.15 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:13:12,279 WARN L194 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:13:14,396 WARN L194 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:13:15,006 WARN L194 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:13:19,187 WARN L194 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-11-07 02:13:21,277 WARN L194 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:13:22,105 WARN L194 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-11-07 02:13:22,108 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:22,109 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:22,543 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2020-11-07 02:13:22,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:13:22,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596426674] [2020-11-07 02:13:22,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:22,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 02:13:22,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539160015] [2020-11-07 02:13:22,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 02:13:22,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:22,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 02:13:22,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-11-07 02:13:22,715 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 16 states. [2020-11-07 02:13:25,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:25,720 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-11-07 02:13:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 02:13:25,720 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-11-07 02:13:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:25,722 INFO L225 Difference]: With dead ends: 70 [2020-11-07 02:13:25,722 INFO L226 Difference]: Without dead ends: 64 [2020-11-07 02:13:25,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2020-11-07 02:13:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-07 02:13:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-11-07 02:13:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-07 02:13:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-11-07 02:13:25,743 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 38 [2020-11-07 02:13:25,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:25,743 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-11-07 02:13:25,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 02:13:25,744 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-11-07 02:13:25,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 02:13:25,744 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:25,745 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:13:25,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 02:13:25,745 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:25,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:25,746 INFO L82 PathProgramCache]: Analyzing trace with hash 824100556, now seen corresponding path program 2 times [2020-11-07 02:13:25,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:25,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515478035] [2020-11-07 02:13:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:31,981 WARN L194 SmtUtils]: Spent 6.23 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:13:38,203 WARN L194 SmtUtils]: Spent 6.22 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:13:38,811 WARN L194 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:13:51,272 WARN L194 SmtUtils]: Spent 12.45 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-11-07 02:13:53,409 WARN L194 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 26 [2020-11-07 02:13:54,625 WARN L194 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 186 DAG size of output: 110 [2020-11-07 02:13:55,292 WARN L194 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:13:59,522 WARN L194 SmtUtils]: Spent 4.17 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:14:00,381 WARN L194 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-11-07 02:14:00,383 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:14:00,384 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:00,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:14:00,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515478035] [2020-11-07 02:14:00,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:00,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:14:00,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928316705] [2020-11-07 02:14:00,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:14:00,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:00,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:14:00,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 02:14:00,505 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 6 states. [2020-11-07 02:14:00,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:00,780 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-11-07 02:14:00,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 02:14:00,781 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-11-07 02:14:00,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:00,784 INFO L225 Difference]: With dead ends: 70 [2020-11-07 02:14:00,784 INFO L226 Difference]: Without dead ends: 55 [2020-11-07 02:14:00,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-07 02:14:00,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-07 02:14:00,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-11-07 02:14:00,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-07 02:14:00,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-11-07 02:14:00,810 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 42 [2020-11-07 02:14:00,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:00,810 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-11-07 02:14:00,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:14:00,810 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-11-07 02:14:00,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 02:14:00,811 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:00,811 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:14:00,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 02:14:00,811 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:00,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:00,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1553809229, now seen corresponding path program 1 times [2020-11-07 02:14:00,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:00,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637599577] [2020-11-07 02:14:00,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:07,057 WARN L194 SmtUtils]: Spent 6.24 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:14:13,284 WARN L194 SmtUtils]: Spent 6.23 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:14:13,879 WARN L194 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:14:20,184 WARN L194 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-11-07 02:14:22,297 WARN L194 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 26 [2020-11-07 02:14:23,781 WARN L194 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 186 DAG size of output: 126 [2020-11-07 02:14:25,873 WARN L194 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:14:26,489 WARN L194 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:14:28,601 WARN L194 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-11-07 02:14:32,127 WARN L194 SmtUtils]: Spent 3.49 s on a formula simplification. DAG size of input: 2936 DAG size of output: 96 [2020-11-07 02:14:33,126 WARN L194 SmtUtils]: Spent 937.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2020-11-07 02:14:33,128 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:14:33,129 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:33,609 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2020-11-07 02:14:33,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:14:33,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637599577] [2020-11-07 02:14:33,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:33,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:14:33,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978199320] [2020-11-07 02:14:33,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:14:33,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:33,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:14:33,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:14:33,663 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 8 states. [2020-11-07 02:14:34,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:34,182 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-11-07 02:14:34,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 02:14:34,183 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-11-07 02:14:34,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:34,184 INFO L225 Difference]: With dead ends: 68 [2020-11-07 02:14:34,184 INFO L226 Difference]: Without dead ends: 53 [2020-11-07 02:14:34,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-07 02:14:34,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-07 02:14:34,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-11-07 02:14:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-07 02:14:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-11-07 02:14:34,226 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 43 [2020-11-07 02:14:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:34,227 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-11-07 02:14:34,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:14:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-11-07 02:14:34,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-07 02:14:34,231 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:34,231 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:14:34,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 02:14:34,232 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:34,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:34,234 INFO L82 PathProgramCache]: Analyzing trace with hash -387641114, now seen corresponding path program 1 times [2020-11-07 02:14:34,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:34,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683320088] [2020-11-07 02:14:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:40,498 WARN L194 SmtUtils]: Spent 6.26 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:14:48,801 WARN L194 SmtUtils]: Spent 8.30 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:14:49,454 WARN L194 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:14:55,744 WARN L194 SmtUtils]: Spent 6.29 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-11-07 02:14:59,926 WARN L194 SmtUtils]: Spent 4.18 s on a formula simplification that was a NOOP. DAG size: 26 [2020-11-07 02:15:05,720 WARN L194 SmtUtils]: Spent 5.78 s on a formula simplification. DAG size of input: 3266 DAG size of output: 112 [2020-11-07 02:15:06,369 WARN L194 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:15:08,470 WARN L194 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 02:15:09,596 WARN L194 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2020-11-07 02:15:11,714 WARN L194 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-11-07 02:15:13,809 WARN L194 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:15:14,709 WARN L194 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-11-07 02:15:14,712 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:15:14,713 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:15:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:15,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:15:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:15:15,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683320088] [2020-11-07 02:15:15,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:15:15,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 02:15:15,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038219693] [2020-11-07 02:15:15,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 02:15:15,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:15:15,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 02:15:15,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-11-07 02:15:15,181 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 16 states. [2020-11-07 02:15:16,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:15:16,250 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2020-11-07 02:15:16,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 02:15:16,251 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-11-07 02:15:16,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:15:16,252 INFO L225 Difference]: With dead ends: 77 [2020-11-07 02:15:16,252 INFO L226 Difference]: Without dead ends: 71 [2020-11-07 02:15:16,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2020-11-07 02:15:16,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-07 02:15:16,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 54. [2020-11-07 02:15:16,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-07 02:15:16,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-11-07 02:15:16,287 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 44 [2020-11-07 02:15:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:15:16,289 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-11-07 02:15:16,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 02:15:16,290 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-11-07 02:15:16,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-07 02:15:16,292 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:15:16,292 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:15:16,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 02:15:16,292 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:15:16,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:15:16,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1043519994, now seen corresponding path program 2 times [2020-11-07 02:15:16,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:15:16,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494782192] [2020-11-07 02:15:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:15:22,556 WARN L194 SmtUtils]: Spent 6.26 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:15:24,698 WARN L194 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:15:31,069 WARN L194 SmtUtils]: Spent 6.35 s on a formula simplification. DAG size of input: 3269 DAG size of output: 101 [2020-11-07 02:15:37,295 WARN L194 SmtUtils]: Spent 6.22 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:15:41,446 WARN L194 SmtUtils]: Spent 4.15 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:15:42,148 WARN L194 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:15:46,401 WARN L194 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-11-07 02:15:50,560 WARN L194 SmtUtils]: Spent 4.16 s on a formula simplification that was a NOOP. DAG size: 26 [2020-11-07 02:15:51,815 WARN L194 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 186 DAG size of output: 112 [2020-11-07 02:15:53,900 WARN L194 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:15:54,554 WARN L194 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:15:55,747 WARN L194 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2020-11-07 02:15:57,870 WARN L194 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-11-07 02:15:59,954 WARN L194 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:16:00,825 WARN L194 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-11-07 02:16:03,046 WARN L194 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 30 [2020-11-07 02:16:05,362 WARN L194 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 190 DAG size of output: 117 [2020-11-07 02:16:05,364 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:16:05,365 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:16:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:16:05,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:16:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:16:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:16:05,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494782192] [2020-11-07 02:16:05,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:16:05,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 02:16:05,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976225754] [2020-11-07 02:16:05,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 02:16:05,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:16:05,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 02:16:05,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:16:05,515 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 7 states. [2020-11-07 02:16:05,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:16:05,900 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2020-11-07 02:16:05,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 02:16:05,901 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-11-07 02:16:05,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:16:05,904 INFO L225 Difference]: With dead ends: 73 [2020-11-07 02:16:05,904 INFO L226 Difference]: Without dead ends: 58 [2020-11-07 02:16:05,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-07 02:16:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-07 02:16:05,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-11-07 02:16:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-07 02:16:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-11-07 02:16:05,924 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 48 [2020-11-07 02:16:05,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:16:05,925 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-11-07 02:16:05,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 02:16:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-11-07 02:16:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-07 02:16:05,925 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:16:05,925 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:16:05,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 02:16:05,926 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:16:05,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:16:05,926 INFO L82 PathProgramCache]: Analyzing trace with hash 953226053, now seen corresponding path program 1 times [2020-11-07 02:16:05,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:16:05,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107446573] [2020-11-07 02:16:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:16:08,068 WARN L194 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:16:09,203 WARN L194 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2020-11-07 02:16:17,567 WARN L194 SmtUtils]: Spent 8.36 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:16:23,829 WARN L194 SmtUtils]: Spent 6.26 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:16:26,168 WARN L194 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 189 DAG size of output: 116 [2020-11-07 02:16:32,397 WARN L194 SmtUtils]: Spent 6.23 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:16:36,550 WARN L194 SmtUtils]: Spent 4.15 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:16:37,225 WARN L194 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:16:41,455 WARN L194 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-11-07 02:16:51,795 WARN L194 SmtUtils]: Spent 10.33 s on a formula simplification that was a NOOP. DAG size: 26 [2020-11-07 02:16:59,481 WARN L194 SmtUtils]: Spent 7.67 s on a formula simplification. DAG size of input: 3266 DAG size of output: 110 [2020-11-07 02:17:01,586 WARN L194 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:17:02,307 WARN L194 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:17:03,617 WARN L194 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2020-11-07 02:17:05,743 WARN L194 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-11-07 02:17:07,839 WARN L194 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:17:08,789 WARN L194 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-11-07 02:17:09,805 WARN L194 SmtUtils]: Spent 963.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2020-11-07 02:17:09,807 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:17:09,809 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:17:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:17:10,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:17:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:17:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:17:10,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107446573] [2020-11-07 02:17:10,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:17:10,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 02:17:10,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222258141] [2020-11-07 02:17:10,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 02:17:10,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:17:10,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 02:17:10,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-11-07 02:17:10,656 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 20 states. [2020-11-07 02:17:12,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:17:12,141 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-11-07 02:17:12,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 02:17:12,142 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-11-07 02:17:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:17:12,143 INFO L225 Difference]: With dead ends: 72 [2020-11-07 02:17:12,143 INFO L226 Difference]: Without dead ends: 66 [2020-11-07 02:17:12,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 02:17:12,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-07 02:17:12,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-11-07 02:17:12,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-07 02:17:12,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-11-07 02:17:12,165 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 49 [2020-11-07 02:17:12,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:17:12,165 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-11-07 02:17:12,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 02:17:12,166 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-11-07 02:17:12,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-07 02:17:12,166 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:17:12,166 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:17:12,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 02:17:12,167 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:17:12,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:17:12,167 INFO L82 PathProgramCache]: Analyzing trace with hash -645360423, now seen corresponding path program 2 times [2020-11-07 02:17:12,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:17:12,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734800652] [2020-11-07 02:17:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:17:16,356 WARN L194 SmtUtils]: Spent 4.19 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:17:18,460 WARN L194 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:17:22,209 WARN L194 SmtUtils]: Spent 3.73 s on a formula simplification. DAG size of input: 2941 DAG size of output: 101 [2020-11-07 02:17:24,338 WARN L194 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:17:28,545 WARN L194 SmtUtils]: Spent 4.21 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:17:32,949 WARN L194 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 1253 DAG size of output: 116 [2020-11-07 02:17:43,323 WARN L194 SmtUtils]: Spent 10.37 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:17:49,567 WARN L194 SmtUtils]: Spent 6.24 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:17:50,392 WARN L194 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:17:56,712 WARN L194 SmtUtils]: Spent 6.32 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-11-07 02:17:58,827 WARN L194 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 26 [2020-11-07 02:18:23,874 WARN L194 SmtUtils]: Spent 25.00 s on a formula simplification. DAG size of input: 9069 DAG size of output: 129 [2020-11-07 02:18:26,026 WARN L194 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:18:28,132 WARN L194 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:18:29,980 WARN L194 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 183 DAG size of output: 132 [2020-11-07 02:18:30,819 WARN L194 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:18:33,651 WARN L194 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 923 DAG size of output: 99 [2020-11-07 02:18:35,795 WARN L194 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-11-07 02:18:37,899 WARN L194 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:18:40,518 WARN L194 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 920 DAG size of output: 96 [2020-11-07 02:18:41,854 WARN L194 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2020-11-07 02:18:46,088 WARN L194 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-11-07 02:18:48,204 WARN L194 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:19:08,197 WARN L194 SmtUtils]: Spent 19.94 s on a formula simplification. DAG size of input: 10430 DAG size of output: 124 [2020-11-07 02:19:10,346 WARN L194 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 30 [2020-11-07 02:19:10,469 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-11-07 02:19:17,746 WARN L194 SmtUtils]: Spent 7.27 s on a formula simplification. DAG size of input: 170 DAG size of output: 134 [2020-11-07 02:19:17,749 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:19:17,750 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:19:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:19:19,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:19:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:19:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:19:19,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734800652] [2020-11-07 02:19:19,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:19:19,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 02:19:19,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569109213] [2020-11-07 02:19:19,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 02:19:19,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:19:19,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 02:19:19,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2020-11-07 02:19:19,059 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 22 states. [2020-11-07 02:19:28,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:19:28,010 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-11-07 02:19:28,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-07 02:19:28,012 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-11-07 02:19:28,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:19:28,014 INFO L225 Difference]: With dead ends: 71 [2020-11-07 02:19:28,014 INFO L226 Difference]: Without dead ends: 65 [2020-11-07 02:19:28,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 02:19:28,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-07 02:19:28,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2020-11-07 02:19:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-07 02:19:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-11-07 02:19:28,050 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 53 [2020-11-07 02:19:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:19:28,051 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-11-07 02:19:28,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 02:19:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-11-07 02:19:28,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-07 02:19:28,052 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:19:28,052 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:19:28,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 02:19:28,052 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:19:28,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:19:28,053 INFO L82 PathProgramCache]: Analyzing trace with hash 137540678, now seen corresponding path program 3 times [2020-11-07 02:19:28,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:19:28,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170211912] [2020-11-07 02:19:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:19:29,902 WARN L194 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2020-11-07 02:19:34,278 WARN L194 SmtUtils]: Spent 4.37 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:19:38,483 WARN L194 SmtUtils]: Spent 4.20 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:19:41,835 WARN L194 SmtUtils]: Spent 3.35 s on a formula simplification. DAG size of input: 189 DAG size of output: 116 [2020-11-07 02:19:45,999 WARN L194 SmtUtils]: Spent 4.16 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:19:54,292 WARN L194 SmtUtils]: Spent 8.29 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:19:55,374 WARN L194 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:20:01,705 WARN L194 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-11-07 02:20:09,975 WARN L194 SmtUtils]: Spent 8.16 s on a formula simplification. DAG size of input: 3266 DAG size of output: 126 [2020-11-07 02:20:16,207 WARN L194 SmtUtils]: Spent 6.23 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:20:20,377 WARN L194 SmtUtils]: Spent 4.17 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:21:17,202 WARN L194 SmtUtils]: Spent 56.78 s on a formula simplification. DAG size of input: 10227 DAG size of output: 144 [2020-11-07 02:21:18,396 WARN L194 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:21:20,517 WARN L194 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 02:21:26,126 WARN L194 SmtUtils]: Spent 5.54 s on a formula simplification. DAG size of input: 2939 DAG size of output: 99 [2020-11-07 02:21:30,338 WARN L194 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-11-07 02:21:32,441 WARN L194 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:21:36,026 WARN L194 SmtUtils]: Spent 3.58 s on a formula simplification. DAG size of input: 920 DAG size of output: 96 [2020-11-07 02:21:37,772 WARN L194 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2020-11-07 02:21:37,775 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:21:37,777 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:21:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:21:38,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:21:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:21:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:21:38,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170211912] [2020-11-07 02:21:38,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:21:38,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:21:38,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664422354] [2020-11-07 02:21:38,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:21:38,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:21:38,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:21:38,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:21:38,094 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 8 states. [2020-11-07 02:21:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:21:38,893 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2020-11-07 02:21:38,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 02:21:38,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-11-07 02:21:38,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:21:38,897 INFO L225 Difference]: With dead ends: 78 [2020-11-07 02:21:38,897 INFO L226 Difference]: Without dead ends: 63 [2020-11-07 02:21:38,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-11-07 02:21:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-07 02:21:38,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-07 02:21:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-07 02:21:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-11-07 02:21:38,924 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 54 [2020-11-07 02:21:38,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:21:38,925 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-11-07 02:21:38,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:21:38,925 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-11-07 02:21:38,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-07 02:21:38,927 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:21:38,927 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:21:38,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 02:21:38,927 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:21:38,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:21:38,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1757228141, now seen corresponding path program 4 times [2020-11-07 02:21:38,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:21:38,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550735796] [2020-11-07 02:21:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:21:39,119 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:21:45,001 WARN L194 SmtUtils]: Spent 5.87 s on a formula simplification. DAG size of input: 2941 DAG size of output: 101 [2020-11-07 02:21:53,306 WARN L194 SmtUtils]: Spent 8.30 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:21:53,429 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:21:56,114 WARN L194 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 189 DAG size of output: 100 [2020-11-07 02:22:04,414 WARN L194 SmtUtils]: Spent 8.30 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:22:10,637 WARN L194 SmtUtils]: Spent 6.22 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:22:11,951 WARN L194 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:22:18,334 WARN L194 SmtUtils]: Spent 6.38 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-11-07 02:22:18,456 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-11-07 02:22:25,438 WARN L194 SmtUtils]: Spent 6.97 s on a formula simplification. DAG size of input: 1250 DAG size of output: 110 [2020-11-07 02:22:29,607 WARN L194 SmtUtils]: Spent 4.17 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:22:33,775 WARN L194 SmtUtils]: Spent 4.17 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:22:39,713 WARN L194 SmtUtils]: Spent 5.93 s on a formula simplification. DAG size of input: 164 DAG size of output: 145 [2020-11-07 02:22:41,832 WARN L194 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:22:43,199 WARN L194 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:22:49,474 WARN L194 SmtUtils]: Spent 6.22 s on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 02:22:54,572 WARN L194 SmtUtils]: Spent 5.09 s on a formula simplification. DAG size of input: 923 DAG size of output: 99 [2020-11-07 02:22:54,690 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-11-07 02:22:58,861 WARN L194 SmtUtils]: Spent 4.17 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:23:00,780 WARN L194 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-11-07 02:23:05,824 WARN L194 SmtUtils]: Spent 4.92 s on a formula simplification. DAG size of input: 2921 DAG size of output: 93 [2020-11-07 02:23:10,124 WARN L194 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-11-07 02:23:12,489 WARN L194 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 185 DAG size of output: 96 [2020-11-07 02:23:15,515 WARN L194 SmtUtils]: Spent 3.02 s on a formula simplification that was a NOOP. DAG size: 30 [2020-11-07 02:23:17,670 WARN L194 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 30 [2020-11-07 02:23:23,399 WARN L194 SmtUtils]: Spent 5.73 s on a formula simplification. DAG size of input: 173 DAG size of output: 128 [2020-11-07 02:23:23,402 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:23:23,403 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:23:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:23:23,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:23:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:23:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:23:23,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550735796] [2020-11-07 02:23:23,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:23:23,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 02:23:23,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668770548] [2020-11-07 02:23:23,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 02:23:23,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:23:23,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 02:23:23,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-07 02:23:23,840 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 9 states. [2020-11-07 02:23:25,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:23:25,247 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2020-11-07 02:23:25,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 02:23:25,252 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-11-07 02:23:25,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:23:25,253 INFO L225 Difference]: With dead ends: 85 [2020-11-07 02:23:25,253 INFO L226 Difference]: Without dead ends: 70 [2020-11-07 02:23:25,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-07 02:23:25,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-07 02:23:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-11-07 02:23:25,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-07 02:23:25,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-11-07 02:23:25,287 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 57 [2020-11-07 02:23:25,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:23:25,288 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-11-07 02:23:25,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 02:23:25,288 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-11-07 02:23:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-07 02:23:25,288 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:23:25,289 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:23:25,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 02:23:25,289 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:23:25,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:23:25,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1603342130, now seen corresponding path program 5 times [2020-11-07 02:23:25,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:23:25,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779078090] [2020-11-07 02:23:25,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:23:30,380 WARN L194 SmtUtils]: Spent 4.91 s on a formula simplification. DAG size of input: 925 DAG size of output: 101 [2020-11-07 02:23:40,736 WARN L194 SmtUtils]: Spent 10.35 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:23:49,063 WARN L194 SmtUtils]: Spent 8.32 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:23:52,857 WARN L194 SmtUtils]: Spent 3.79 s on a formula simplification. DAG size of input: 189 DAG size of output: 116 [2020-11-07 02:23:59,077 WARN L194 SmtUtils]: Spent 6.22 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:24:07,344 WARN L194 SmtUtils]: Spent 8.26 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:24:09,046 WARN L194 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:24:19,497 WARN L194 SmtUtils]: Spent 10.45 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-11-07 02:24:23,867 WARN L194 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 186 DAG size of output: 126 [2020-11-07 02:24:28,035 WARN L194 SmtUtils]: Spent 4.16 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:24:32,189 WARN L194 SmtUtils]: Spent 4.15 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:25:10,262 WARN L194 SmtUtils]: Spent 38.02 s on a formula simplification. DAG size of input: 10596 DAG size of output: 146 [2020-11-07 02:25:12,347 WARN L194 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-07 02:25:13,583 WARN L194 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-11-07 02:25:15,648 WARN L194 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2020-11-07 02:25:17,783 WARN L194 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-11-07 02:25:19,882 WARN L194 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 02:25:21,361 WARN L194 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-11-07 02:25:22,997 WARN L194 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 93 DAG size of output: 93