/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:35:48,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:35:48,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:35:48,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:35:48,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:35:48,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:35:48,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:35:48,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:35:48,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:35:48,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:35:48,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:35:48,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:35:48,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:35:48,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:35:48,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:35:48,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:35:48,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:35:48,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:35:48,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:35:48,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:35:48,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:35:48,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:35:48,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:35:48,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:35:48,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:35:48,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:35:48,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:35:48,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:35:48,472 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 06:35:48,494 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:35:48,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:35:48,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:35:48,499 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:35:48,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:35:48,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:35:48,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:35:48,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:35:48,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:35:48,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:35:48,510 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:35:48,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:35:48,510 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:35:48,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:35:48,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:35:48,512 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:35:48,512 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:35:48,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:35:48,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:35:48,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:35:48,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:35:48,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:35:48,513 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:35:48,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:35:49,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:35:49,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:35:49,015 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:35:49,016 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:35:49,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-11-07 06:35:49,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd700b5e/ea31830db61244a4b3633368cefddef8/FLAG2dbf74d5c [2020-11-07 06:35:49,872 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:35:49,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-11-07 06:35:49,881 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd700b5e/ea31830db61244a4b3633368cefddef8/FLAG2dbf74d5c [2020-11-07 06:35:50,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd700b5e/ea31830db61244a4b3633368cefddef8 [2020-11-07 06:35:50,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:35:50,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:35:50,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:50,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:35:50,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:35:50,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:50" (1/1) ... [2020-11-07 06:35:50,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e4fabd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:50, skipping insertion in model container [2020-11-07 06:35:50,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:50" (1/1) ... [2020-11-07 06:35:50,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:35:50,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:35:50,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:50,486 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:35:50,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:50,522 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:35:50,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:50 WrapperNode [2020-11-07 06:35:50,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:50,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:35:50,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:35:50,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:35:50,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:50" (1/1) ... [2020-11-07 06:35:50,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:50" (1/1) ... [2020-11-07 06:35:50,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:50" (1/1) ... [2020-11-07 06:35:50,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:50" (1/1) ... [2020-11-07 06:35:50,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:50" (1/1) ... [2020-11-07 06:35:50,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:50" (1/1) ... [2020-11-07 06:35:50,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:50" (1/1) ... [2020-11-07 06:35:50,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:35:50,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:35:50,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:35:50,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:35:50,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:50" (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 06:35:50,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:35:50,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:35:50,630 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:35:50,630 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:35:50,630 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:35:50,630 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:35:50,630 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:35:50,631 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:35:50,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:35:50,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:35:50,631 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:35:50,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:35:50,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:35:50,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:35:50,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:35:50,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:35:50,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:35:50,975 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:35:50,975 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 06:35:50,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:50 BoogieIcfgContainer [2020-11-07 06:35:50,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:35:50,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:35:50,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:35:50,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:35:50,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:35:50" (1/3) ... [2020-11-07 06:35:50,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de7969e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:50, skipping insertion in model container [2020-11-07 06:35:50,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:50" (2/3) ... [2020-11-07 06:35:50,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de7969e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:50, skipping insertion in model container [2020-11-07 06:35:50,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:50" (3/3) ... [2020-11-07 06:35:50,988 INFO L111 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2020-11-07 06:35:51,023 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:35:51,027 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:35:51,041 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:35:51,067 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:35:51,067 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:35:51,067 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:35:51,068 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:35:51,068 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:35:51,068 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:35:51,068 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:35:51,068 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:35:51,085 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-11-07 06:35:51,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-07 06:35:51,094 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:51,095 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] [2020-11-07 06:35:51,095 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:51,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:51,105 INFO L82 PathProgramCache]: Analyzing trace with hash -772490682, now seen corresponding path program 1 times [2020-11-07 06:35:51,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:51,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421339225] [2020-11-07 06:35:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,425 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 06:35:51,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421339225] [2020-11-07 06:35:51,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:51,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 06:35:51,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972761428] [2020-11-07 06:35:51,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 06:35:51,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:51,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 06:35:51,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 06:35:51,455 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-11-07 06:35:51,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:51,618 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-11-07 06:35:51,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 06:35:51,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-07 06:35:51,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:51,627 INFO L225 Difference]: With dead ends: 50 [2020-11-07 06:35:51,628 INFO L226 Difference]: Without dead ends: 29 [2020-11-07 06:35:51,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:35:51,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-07 06:35:51,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-11-07 06:35:51,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-07 06:35:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-11-07 06:35:51,685 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 20 [2020-11-07 06:35:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:51,685 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-11-07 06:35:51,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 06:35:51,686 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-11-07 06:35:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-07 06:35:51,687 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:51,687 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] [2020-11-07 06:35:51,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:35:51,688 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:51,689 INFO L82 PathProgramCache]: Analyzing trace with hash 515607529, now seen corresponding path program 1 times [2020-11-07 06:35:51,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:51,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308508577] [2020-11-07 06:35:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:51,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308508577] [2020-11-07 06:35:51,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:51,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-07 06:35:51,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599150327] [2020-11-07 06:35:51,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:35:51,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:51,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:35:51,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:35:51,888 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 6 states. [2020-11-07 06:35:52,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:52,127 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-11-07 06:35:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 06:35:52,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-11-07 06:35:52,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:52,129 INFO L225 Difference]: With dead ends: 40 [2020-11-07 06:35:52,129 INFO L226 Difference]: Without dead ends: 34 [2020-11-07 06:35:52,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:35:52,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-07 06:35:52,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-11-07 06:35:52,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-07 06:35:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-11-07 06:35:52,142 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 25 [2020-11-07 06:35:52,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:52,143 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-11-07 06:35:52,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:35:52,143 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-11-07 06:35:52,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-07 06:35:52,144 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:52,145 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:52,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:35:52,145 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:52,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1732949978, now seen corresponding path program 2 times [2020-11-07 06:35:52,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:52,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238499447] [2020-11-07 06:35:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:52,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:52,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238499447] [2020-11-07 06:35:52,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:52,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-07 06:35:52,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309754656] [2020-11-07 06:35:52,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:35:52,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:52,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:35:52,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:35:52,311 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 8 states. [2020-11-07 06:35:52,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:52,729 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-11-07 06:35:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 06:35:52,730 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-11-07 06:35:52,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:52,731 INFO L225 Difference]: With dead ends: 45 [2020-11-07 06:35:52,732 INFO L226 Difference]: Without dead ends: 39 [2020-11-07 06:35:52,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-11-07 06:35:52,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-07 06:35:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-11-07 06:35:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-07 06:35:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-11-07 06:35:52,745 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 30 [2020-11-07 06:35:52,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:52,746 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-11-07 06:35:52,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:35:52,746 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-11-07 06:35:52,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-07 06:35:52,747 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:52,747 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:52,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:35:52,748 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:52,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:52,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1450661367, now seen corresponding path program 3 times [2020-11-07 06:35:52,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:52,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598510086] [2020-11-07 06:35:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:52,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:52,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598510086] [2020-11-07 06:35:52,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:52,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 06:35:52,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382296032] [2020-11-07 06:35:52,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:35:52,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:52,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:35:52,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:35:52,979 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 10 states. [2020-11-07 06:35:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:53,481 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-11-07 06:35:53,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 06:35:53,481 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-11-07 06:35:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:53,482 INFO L225 Difference]: With dead ends: 50 [2020-11-07 06:35:53,483 INFO L226 Difference]: Without dead ends: 44 [2020-11-07 06:35:53,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:35:53,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-07 06:35:53,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-11-07 06:35:53,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-07 06:35:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-11-07 06:35:53,497 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 35 [2020-11-07 06:35:53,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:53,498 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-11-07 06:35:53,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:35:53,498 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-11-07 06:35:53,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-07 06:35:53,499 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:53,499 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:53,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:35:53,500 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:53,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:53,501 INFO L82 PathProgramCache]: Analyzing trace with hash 772144646, now seen corresponding path program 4 times [2020-11-07 06:35:53,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:53,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093438786] [2020-11-07 06:35:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:53,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:53,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093438786] [2020-11-07 06:35:53,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:53,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:35:53,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564489498] [2020-11-07 06:35:53,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:35:53,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:53,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:35:53,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:53,745 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 12 states. [2020-11-07 06:35:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:54,511 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-11-07 06:35:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 06:35:54,513 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-11-07 06:35:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:54,515 INFO L225 Difference]: With dead ends: 55 [2020-11-07 06:35:54,515 INFO L226 Difference]: Without dead ends: 49 [2020-11-07 06:35:54,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-11-07 06:35:54,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-07 06:35:54,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-11-07 06:35:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-07 06:35:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-11-07 06:35:54,544 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 40 [2020-11-07 06:35:54,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:54,544 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-11-07 06:35:54,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:35:54,545 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-11-07 06:35:54,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-07 06:35:54,547 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:54,547 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:54,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:35:54,548 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:54,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:54,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1100914729, now seen corresponding path program 5 times [2020-11-07 06:35:54,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:54,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814314542] [2020-11-07 06:35:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:54,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:54,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814314542] [2020-11-07 06:35:54,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:54,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-07 06:35:54,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895302162] [2020-11-07 06:35:54,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 06:35:54,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:54,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 06:35:54,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:35:54,870 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 14 states. [2020-11-07 06:35:55,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:55,992 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-11-07 06:35:55,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 06:35:55,999 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-11-07 06:35:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:56,000 INFO L225 Difference]: With dead ends: 60 [2020-11-07 06:35:56,000 INFO L226 Difference]: Without dead ends: 54 [2020-11-07 06:35:56,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-11-07 06:35:56,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-07 06:35:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-11-07 06:35:56,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-07 06:35:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-11-07 06:35:56,032 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 45 [2020-11-07 06:35:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:56,037 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-11-07 06:35:56,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 06:35:56,037 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-11-07 06:35:56,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-07 06:35:56,041 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:56,041 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:56,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 06:35:56,042 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:56,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:56,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1507122150, now seen corresponding path program 6 times [2020-11-07 06:35:56,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:56,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482910808] [2020-11-07 06:35:56,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:56,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:56,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482910808] [2020-11-07 06:35:56,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:56,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 06:35:56,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753610219] [2020-11-07 06:35:56,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 06:35:56,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:56,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 06:35:56,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:35:56,502 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 16 states. [2020-11-07 06:35:57,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:57,865 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-11-07 06:35:57,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 06:35:57,866 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-11-07 06:35:57,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:57,868 INFO L225 Difference]: With dead ends: 65 [2020-11-07 06:35:57,868 INFO L226 Difference]: Without dead ends: 59 [2020-11-07 06:35:57,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 06:35:57,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-07 06:35:57,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-11-07 06:35:57,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-07 06:35:57,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-11-07 06:35:57,900 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 50 [2020-11-07 06:35:57,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:57,903 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-11-07 06:35:57,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 06:35:57,903 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-11-07 06:35:57,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-07 06:35:57,912 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:57,912 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:57,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 06:35:57,913 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:57,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:57,913 INFO L82 PathProgramCache]: Analyzing trace with hash -472945079, now seen corresponding path program 7 times [2020-11-07 06:35:57,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:57,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679349677] [2020-11-07 06:35:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:58,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:58,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679349677] [2020-11-07 06:35:58,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:58,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 06:35:58,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444379950] [2020-11-07 06:35:58,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 06:35:58,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:58,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 06:35:58,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:35:58,376 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 18 states. [2020-11-07 06:35:59,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:59,982 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-11-07 06:35:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 06:35:59,982 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-11-07 06:35:59,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:59,983 INFO L225 Difference]: With dead ends: 70 [2020-11-07 06:35:59,984 INFO L226 Difference]: Without dead ends: 64 [2020-11-07 06:35:59,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:35:59,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-07 06:36:00,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-11-07 06:36:00,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-07 06:36:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-11-07 06:36:00,023 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 55 [2020-11-07 06:36:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:00,024 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-11-07 06:36:00,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 06:36:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-11-07 06:36:00,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-07 06:36:00,025 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:00,025 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:00,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 06:36:00,026 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:00,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:00,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1385161158, now seen corresponding path program 8 times [2020-11-07 06:36:00,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:00,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394163542] [2020-11-07 06:36:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:00,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:00,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394163542] [2020-11-07 06:36:00,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:00,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-07 06:36:00,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18890156] [2020-11-07 06:36:00,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 06:36:00,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:00,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 06:36:00,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:36:00,477 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 20 states. [2020-11-07 06:36:02,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:02,395 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-11-07 06:36:02,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 06:36:02,396 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-11-07 06:36:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:02,399 INFO L225 Difference]: With dead ends: 75 [2020-11-07 06:36:02,399 INFO L226 Difference]: Without dead ends: 69 [2020-11-07 06:36:02,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=224, Invalid=1756, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 06:36:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-07 06:36:02,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-11-07 06:36:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-07 06:36:02,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-11-07 06:36:02,443 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 60 [2020-11-07 06:36:02,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:02,443 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-11-07 06:36:02,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 06:36:02,444 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-11-07 06:36:02,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-07 06:36:02,449 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:02,449 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:02,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 06:36:02,451 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:02,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:02,452 INFO L82 PathProgramCache]: Analyzing trace with hash 778900585, now seen corresponding path program 9 times [2020-11-07 06:36:02,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:02,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659263511] [2020-11-07 06:36:02,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:02,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:02,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659263511] [2020-11-07 06:36:02,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:02,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-11-07 06:36:02,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878181346] [2020-11-07 06:36:02,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 06:36:02,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:02,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 06:36:02,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-11-07 06:36:02,966 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 22 states. [2020-11-07 06:36:05,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:05,198 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-11-07 06:36:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-07 06:36:05,199 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 65 [2020-11-07 06:36:05,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:05,201 INFO L225 Difference]: With dead ends: 80 [2020-11-07 06:36:05,201 INFO L226 Difference]: Without dead ends: 74 [2020-11-07 06:36:05,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 06:36:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-07 06:36:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2020-11-07 06:36:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-07 06:36:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-11-07 06:36:05,221 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 65 [2020-11-07 06:36:05,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:05,222 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-11-07 06:36:05,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 06:36:05,222 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-11-07 06:36:05,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-07 06:36:05,223 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:05,223 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:05,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 06:36:05,224 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:05,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:05,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1658515546, now seen corresponding path program 10 times [2020-11-07 06:36:05,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:05,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441510451] [2020-11-07 06:36:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:05,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:05,785 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:05,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441510451] [2020-11-07 06:36:05,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:05,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-11-07 06:36:05,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257257666] [2020-11-07 06:36:05,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 06:36:05,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:05,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 06:36:05,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-11-07 06:36:05,788 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 24 states. [2020-11-07 06:36:08,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:08,216 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2020-11-07 06:36:08,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-07 06:36:08,216 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2020-11-07 06:36:08,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:08,217 INFO L225 Difference]: With dead ends: 85 [2020-11-07 06:36:08,218 INFO L226 Difference]: Without dead ends: 79 [2020-11-07 06:36:08,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=278, Invalid=2692, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 06:36:08,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-07 06:36:08,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2020-11-07 06:36:08,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-07 06:36:08,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-11-07 06:36:08,239 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 70 [2020-11-07 06:36:08,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:08,239 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-11-07 06:36:08,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 06:36:08,239 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-11-07 06:36:08,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-07 06:36:08,240 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:08,240 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:08,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 06:36:08,241 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:08,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2125884791, now seen corresponding path program 11 times [2020-11-07 06:36:08,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:08,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448732186] [2020-11-07 06:36:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:08,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:08,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448732186] [2020-11-07 06:36:08,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:08,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-11-07 06:36:08,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921762683] [2020-11-07 06:36:08,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 06:36:08,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:08,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 06:36:08,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2020-11-07 06:36:08,908 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 26 states. [2020-11-07 06:36:11,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:11,900 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-11-07 06:36:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-07 06:36:11,901 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-11-07 06:36:11,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:11,902 INFO L225 Difference]: With dead ends: 90 [2020-11-07 06:36:11,902 INFO L226 Difference]: Without dead ends: 84 [2020-11-07 06:36:11,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 06:36:11,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-07 06:36:11,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-11-07 06:36:11,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-07 06:36:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-11-07 06:36:11,932 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 75 [2020-11-07 06:36:11,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:11,933 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-11-07 06:36:11,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 06:36:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-11-07 06:36:11,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-11-07 06:36:11,934 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:11,934 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:11,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 06:36:11,935 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:11,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:11,935 INFO L82 PathProgramCache]: Analyzing trace with hash -318610042, now seen corresponding path program 12 times [2020-11-07 06:36:11,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:11,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088354246] [2020-11-07 06:36:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:12,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:12,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088354246] [2020-11-07 06:36:12,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:12,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-11-07 06:36:12,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534005386] [2020-11-07 06:36:12,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 06:36:12,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:12,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 06:36:12,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-11-07 06:36:12,735 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 28 states. [2020-11-07 06:36:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:16,060 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2020-11-07 06:36:16,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-07 06:36:16,061 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2020-11-07 06:36:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:16,062 INFO L225 Difference]: With dead ends: 95 [2020-11-07 06:36:16,062 INFO L226 Difference]: Without dead ends: 89 [2020-11-07 06:36:16,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=332, Invalid=3828, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 06:36:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-07 06:36:16,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2020-11-07 06:36:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-07 06:36:16,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2020-11-07 06:36:16,085 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 80 [2020-11-07 06:36:16,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:16,085 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2020-11-07 06:36:16,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 06:36:16,085 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2020-11-07 06:36:16,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-07 06:36:16,086 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:16,086 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:16,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 06:36:16,086 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:16,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:16,087 INFO L82 PathProgramCache]: Analyzing trace with hash 498526377, now seen corresponding path program 13 times [2020-11-07 06:36:16,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:16,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709881503] [2020-11-07 06:36:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:16,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:16,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709881503] [2020-11-07 06:36:16,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:16,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-11-07 06:36:16,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884474797] [2020-11-07 06:36:16,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-07 06:36:16,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:16,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-07 06:36:16,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-11-07 06:36:16,935 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 30 states. [2020-11-07 06:36:20,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:20,712 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-11-07 06:36:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-07 06:36:20,713 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2020-11-07 06:36:20,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:20,714 INFO L225 Difference]: With dead ends: 100 [2020-11-07 06:36:20,714 INFO L226 Difference]: Without dead ends: 94 [2020-11-07 06:36:20,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=359, Invalid=4471, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 06:36:20,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-07 06:36:20,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-11-07 06:36:20,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-07 06:36:20,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-11-07 06:36:20,744 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 85 [2020-11-07 06:36:20,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:20,744 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-11-07 06:36:20,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-07 06:36:20,744 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-11-07 06:36:20,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-11-07 06:36:20,745 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:20,745 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:20,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 06:36:20,746 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:20,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:20,746 INFO L82 PathProgramCache]: Analyzing trace with hash 68543334, now seen corresponding path program 14 times [2020-11-07 06:36:20,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:20,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834425885] [2020-11-07 06:36:20,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:21,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:21,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834425885] [2020-11-07 06:36:21,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:21,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-11-07 06:36:21,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108727189] [2020-11-07 06:36:21,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-07 06:36:21,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:21,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-07 06:36:21,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-11-07 06:36:21,717 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 32 states. [2020-11-07 06:36:26,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:26,036 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2020-11-07 06:36:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-07 06:36:26,037 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 90 [2020-11-07 06:36:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:26,038 INFO L225 Difference]: With dead ends: 105 [2020-11-07 06:36:26,039 INFO L226 Difference]: Without dead ends: 99 [2020-11-07 06:36:26,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=386, Invalid=5164, Unknown=0, NotChecked=0, Total=5550 [2020-11-07 06:36:26,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-07 06:36:26,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2020-11-07 06:36:26,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-07 06:36:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-11-07 06:36:26,059 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 90 [2020-11-07 06:36:26,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:26,060 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-11-07 06:36:26,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-07 06:36:26,060 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-11-07 06:36:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 06:36:26,061 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:26,061 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:26,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 06:36:26,061 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:26,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:26,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1183258313, now seen corresponding path program 15 times [2020-11-07 06:36:26,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:26,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267772427] [2020-11-07 06:36:26,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:27,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:27,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267772427] [2020-11-07 06:36:27,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:27,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-11-07 06:36:27,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021082572] [2020-11-07 06:36:27,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-07 06:36:27,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:27,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-07 06:36:27,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 06:36:27,152 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 34 states. [2020-11-07 06:36:31,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:31,971 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-11-07 06:36:31,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-07 06:36:31,972 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 95 [2020-11-07 06:36:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:31,974 INFO L225 Difference]: With dead ends: 110 [2020-11-07 06:36:31,974 INFO L226 Difference]: Without dead ends: 104 [2020-11-07 06:36:31,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=413, Invalid=5907, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 06:36:31,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-07 06:36:31,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2020-11-07 06:36:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-07 06:36:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-11-07 06:36:31,996 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 95 [2020-11-07 06:36:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:31,996 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-11-07 06:36:31,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-07 06:36:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-11-07 06:36:31,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-11-07 06:36:31,997 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:31,998 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:31,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 06:36:31,998 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:31,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:31,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1832023738, now seen corresponding path program 16 times [2020-11-07 06:36:31,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:31,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58799180] [2020-11-07 06:36:31,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:33,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:33,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58799180] [2020-11-07 06:36:33,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:33,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-11-07 06:36:33,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140989530] [2020-11-07 06:36:33,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 06:36:33,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:33,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 06:36:33,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 06:36:33,203 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 36 states. [2020-11-07 06:36:38,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:38,607 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2020-11-07 06:36:38,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-07 06:36:38,608 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 100 [2020-11-07 06:36:38,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:38,610 INFO L225 Difference]: With dead ends: 115 [2020-11-07 06:36:38,610 INFO L226 Difference]: Without dead ends: 109 [2020-11-07 06:36:38,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=440, Invalid=6700, Unknown=0, NotChecked=0, Total=7140 [2020-11-07 06:36:38,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-07 06:36:38,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2020-11-07 06:36:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-07 06:36:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2020-11-07 06:36:38,634 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 100 [2020-11-07 06:36:38,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:38,635 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2020-11-07 06:36:38,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 06:36:38,635 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2020-11-07 06:36:38,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-07 06:36:38,636 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:38,636 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:38,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 06:36:38,636 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:38,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:38,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1611406569, now seen corresponding path program 17 times [2020-11-07 06:36:38,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:38,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325619881] [2020-11-07 06:36:38,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:39,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:39,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325619881] [2020-11-07 06:36:39,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:39,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-11-07 06:36:39,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190749890] [2020-11-07 06:36:39,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-07 06:36:39,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:39,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-07 06:36:39,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1316, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 06:36:39,888 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 38 states. [2020-11-07 06:36:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:45,903 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-11-07 06:36:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-07 06:36:45,904 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 105 [2020-11-07 06:36:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:45,905 INFO L225 Difference]: With dead ends: 120 [2020-11-07 06:36:45,905 INFO L226 Difference]: Without dead ends: 114 [2020-11-07 06:36:45,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=467, Invalid=7543, Unknown=0, NotChecked=0, Total=8010 [2020-11-07 06:36:45,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-07 06:36:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-11-07 06:36:45,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-11-07 06:36:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-11-07 06:36:45,932 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 105 [2020-11-07 06:36:45,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:45,932 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-11-07 06:36:45,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-07 06:36:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-11-07 06:36:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-11-07 06:36:45,933 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:45,933 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:45,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 06:36:45,933 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:45,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:45,934 INFO L82 PathProgramCache]: Analyzing trace with hash 404182822, now seen corresponding path program 18 times [2020-11-07 06:36:45,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:45,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271438703] [2020-11-07 06:36:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:47,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:47,384 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:47,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271438703] [2020-11-07 06:36:47,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:47,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-11-07 06:36:47,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899495091] [2020-11-07 06:36:47,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-07 06:36:47,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:47,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-07 06:36:47,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:36:47,390 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 40 states. [2020-11-07 06:36:53,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:53,987 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2020-11-07 06:36:53,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-07 06:36:53,988 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 110 [2020-11-07 06:36:53,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:53,990 INFO L225 Difference]: With dead ends: 125 [2020-11-07 06:36:53,990 INFO L226 Difference]: Without dead ends: 119 [2020-11-07 06:36:53,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=494, Invalid=8436, Unknown=0, NotChecked=0, Total=8930 [2020-11-07 06:36:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-11-07 06:36:54,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2020-11-07 06:36:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-11-07 06:36:54,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2020-11-07 06:36:54,015 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 110 [2020-11-07 06:36:54,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:54,015 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2020-11-07 06:36:54,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-07 06:36:54,015 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2020-11-07 06:36:54,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 06:36:54,016 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:54,017 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:54,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 06:36:54,017 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:54,018 INFO L82 PathProgramCache]: Analyzing trace with hash 270007049, now seen corresponding path program 19 times [2020-11-07 06:36:54,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:54,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725983582] [2020-11-07 06:36:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:55,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:55,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725983582] [2020-11-07 06:36:55,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:55,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-11-07 06:36:55,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179418604] [2020-11-07 06:36:55,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-07 06:36:55,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:55,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-07 06:36:55,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1622, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 06:36:55,547 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 42 states. [2020-11-07 06:37:02,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:02,847 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-11-07 06:37:02,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-11-07 06:37:02,848 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 115 [2020-11-07 06:37:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:02,849 INFO L225 Difference]: With dead ends: 130 [2020-11-07 06:37:02,850 INFO L226 Difference]: Without dead ends: 124 [2020-11-07 06:37:02,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=521, Invalid=9379, Unknown=0, NotChecked=0, Total=9900 [2020-11-07 06:37:02,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-07 06:37:02,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2020-11-07 06:37:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-11-07 06:37:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-11-07 06:37:02,881 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 115 [2020-11-07 06:37:02,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:02,882 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-11-07 06:37:02,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-07 06:37:02,882 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-11-07 06:37:02,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-11-07 06:37:02,883 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:02,883 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:02,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 06:37:02,884 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:02,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:02,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1050587898, now seen corresponding path program 20 times [2020-11-07 06:37:02,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:02,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778562372] [2020-11-07 06:37:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:04,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:37:04,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778562372] [2020-11-07 06:37:04,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:04,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-11-07 06:37:04,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740303813] [2020-11-07 06:37:04,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-07 06:37:04,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:04,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-07 06:37:04,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1787, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 06:37:04,647 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 44 states. [2020-11-07 06:37:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:12,594 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2020-11-07 06:37:12,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-07 06:37:12,594 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 120 [2020-11-07 06:37:12,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:12,596 INFO L225 Difference]: With dead ends: 135 [2020-11-07 06:37:12,596 INFO L226 Difference]: Without dead ends: 129 [2020-11-07 06:37:12,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=548, Invalid=10372, Unknown=0, NotChecked=0, Total=10920 [2020-11-07 06:37:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-11-07 06:37:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2020-11-07 06:37:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-07 06:37:12,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2020-11-07 06:37:12,623 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 120 [2020-11-07 06:37:12,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:12,624 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2020-11-07 06:37:12,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-07 06:37:12,624 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2020-11-07 06:37:12,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 06:37:12,625 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:12,625 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:12,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 06:37:12,626 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:12,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:12,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1576841513, now seen corresponding path program 21 times [2020-11-07 06:37:12,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:12,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211727276] [2020-11-07 06:37:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:14,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:37:14,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211727276] [2020-11-07 06:37:14,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:14,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-11-07 06:37:14,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553374929] [2020-11-07 06:37:14,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-07 06:37:14,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:14,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-07 06:37:14,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1960, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 06:37:14,520 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 46 states. [2020-11-07 06:37:23,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:23,234 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2020-11-07 06:37:23,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-07 06:37:23,238 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 125 [2020-11-07 06:37:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:23,239 INFO L225 Difference]: With dead ends: 140 [2020-11-07 06:37:23,239 INFO L226 Difference]: Without dead ends: 134 [2020-11-07 06:37:23,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=575, Invalid=11415, Unknown=0, NotChecked=0, Total=11990 [2020-11-07 06:37:23,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-11-07 06:37:23,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-11-07 06:37:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-11-07 06:37:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-11-07 06:37:23,275 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 125 [2020-11-07 06:37:23,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:23,277 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-11-07 06:37:23,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-11-07 06:37:23,278 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-11-07 06:37:23,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-07 06:37:23,279 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:23,280 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:23,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 06:37:23,280 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:23,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:23,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1251568358, now seen corresponding path program 22 times [2020-11-07 06:37:23,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:23,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986119981] [2020-11-07 06:37:23,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:25,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:37:25,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986119981] [2020-11-07 06:37:25,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:25,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-11-07 06:37:25,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85702701] [2020-11-07 06:37:25,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-07 06:37:25,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:25,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-07 06:37:25,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 06:37:25,442 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 48 states. [2020-11-07 06:37:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:35,100 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2020-11-07 06:37:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-11-07 06:37:35,101 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 130 [2020-11-07 06:37:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:35,102 INFO L225 Difference]: With dead ends: 145 [2020-11-07 06:37:35,103 INFO L226 Difference]: Without dead ends: 139 [2020-11-07 06:37:35,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=602, Invalid=12508, Unknown=0, NotChecked=0, Total=13110 [2020-11-07 06:37:35,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-07 06:37:35,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2020-11-07 06:37:35,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-11-07 06:37:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2020-11-07 06:37:35,141 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 130 [2020-11-07 06:37:35,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:35,141 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2020-11-07 06:37:35,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-07 06:37:35,141 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2020-11-07 06:37:35,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 06:37:35,142 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:35,143 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:35,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 06:37:35,143 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:35,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:35,143 INFO L82 PathProgramCache]: Analyzing trace with hash -762560695, now seen corresponding path program 23 times [2020-11-07 06:37:35,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:35,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402751204] [2020-11-07 06:37:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:37,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:37:37,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402751204] [2020-11-07 06:37:37,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:37,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-11-07 06:37:37,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520030899] [2020-11-07 06:37:37,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-07 06:37:37,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:37,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-07 06:37:37,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 06:37:37,432 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 50 states. [2020-11-07 06:37:48,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:48,015 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2020-11-07 06:37:48,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-11-07 06:37:48,016 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 135 [2020-11-07 06:37:48,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:48,018 INFO L225 Difference]: With dead ends: 150 [2020-11-07 06:37:48,018 INFO L226 Difference]: Without dead ends: 144 [2020-11-07 06:37:48,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=629, Invalid=13651, Unknown=0, NotChecked=0, Total=14280 [2020-11-07 06:37:48,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-11-07 06:37:48,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2020-11-07 06:37:48,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-11-07 06:37:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2020-11-07 06:37:48,059 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 135 [2020-11-07 06:37:48,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:48,060 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2020-11-07 06:37:48,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-07 06:37:48,060 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2020-11-07 06:37:48,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-11-07 06:37:48,061 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:48,061 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:48,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 06:37:48,062 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:48,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:48,062 INFO L82 PathProgramCache]: Analyzing trace with hash -567430970, now seen corresponding path program 24 times [2020-11-07 06:37:48,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:48,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384912853] [2020-11-07 06:37:48,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:50,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:37:50,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384912853] [2020-11-07 06:37:50,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:50,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-11-07 06:37:50,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91916880] [2020-11-07 06:37:50,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-11-07 06:37:50,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:50,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-11-07 06:37:50,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 06:37:50,635 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 52 states. [2020-11-07 06:38:02,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:02,222 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2020-11-07 06:38:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-07 06:38:02,232 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 140 [2020-11-07 06:38:02,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:02,234 INFO L225 Difference]: With dead ends: 155 [2020-11-07 06:38:02,234 INFO L226 Difference]: Without dead ends: 149 [2020-11-07 06:38:02,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=656, Invalid=14844, Unknown=0, NotChecked=0, Total=15500 [2020-11-07 06:38:02,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-07 06:38:02,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2020-11-07 06:38:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-11-07 06:38:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2020-11-07 06:38:02,266 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 140 [2020-11-07 06:38:02,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:02,267 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2020-11-07 06:38:02,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-11-07 06:38:02,267 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2020-11-07 06:38:02,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 06:38:02,268 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:02,268 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:02,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 06:38:02,268 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:02,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:02,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1743215255, now seen corresponding path program 25 times [2020-11-07 06:38:02,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:02,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974317238] [2020-11-07 06:38:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:05,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:38:05,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974317238] [2020-11-07 06:38:05,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:05,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-11-07 06:38:05,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369638070] [2020-11-07 06:38:05,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-11-07 06:38:05,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:05,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-11-07 06:38:05,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2732, Unknown=0, NotChecked=0, Total=2862 [2020-11-07 06:38:05,094 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 54 states. [2020-11-07 06:38:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:17,663 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2020-11-07 06:38:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-07 06:38:17,664 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 145 [2020-11-07 06:38:17,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:17,666 INFO L225 Difference]: With dead ends: 160 [2020-11-07 06:38:17,666 INFO L226 Difference]: Without dead ends: 154 [2020-11-07 06:38:17,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=683, Invalid=16087, Unknown=0, NotChecked=0, Total=16770 [2020-11-07 06:38:17,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-07 06:38:17,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2020-11-07 06:38:17,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-11-07 06:38:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2020-11-07 06:38:17,706 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 145 [2020-11-07 06:38:17,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:17,707 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2020-11-07 06:38:17,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-11-07 06:38:17,707 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2020-11-07 06:38:17,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-11-07 06:38:17,708 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:17,708 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:17,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 06:38:17,709 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:17,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:17,709 INFO L82 PathProgramCache]: Analyzing trace with hash -183755098, now seen corresponding path program 26 times [2020-11-07 06:38:17,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:17,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513331162] [2020-11-07 06:38:17,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:20,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:38:20,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513331162] [2020-11-07 06:38:20,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:20,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-11-07 06:38:20,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644275219] [2020-11-07 06:38:20,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-11-07 06:38:20,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:20,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-11-07 06:38:20,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2945, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 06:38:20,778 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 56 states. [2020-11-07 06:38:34,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:34,444 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2020-11-07 06:38:34,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-11-07 06:38:34,445 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 150 [2020-11-07 06:38:34,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:34,447 INFO L225 Difference]: With dead ends: 165 [2020-11-07 06:38:34,448 INFO L226 Difference]: Without dead ends: 159 [2020-11-07 06:38:34,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=710, Invalid=17380, Unknown=0, NotChecked=0, Total=18090 [2020-11-07 06:38:34,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-11-07 06:38:34,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2020-11-07 06:38:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-11-07 06:38:34,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2020-11-07 06:38:34,488 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 150 [2020-11-07 06:38:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:34,488 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2020-11-07 06:38:34,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-11-07 06:38:34,489 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2020-11-07 06:38:34,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-07 06:38:34,490 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:34,490 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:34,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 06:38:34,490 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:34,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:34,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1703681143, now seen corresponding path program 27 times [2020-11-07 06:38:34,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:34,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463272540] [2020-11-07 06:38:34,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:37,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:38:37,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463272540] [2020-11-07 06:38:37,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:37,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-11-07 06:38:37,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44113683] [2020-11-07 06:38:37,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-11-07 06:38:37,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:37,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-11-07 06:38:37,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=3166, Unknown=0, NotChecked=0, Total=3306 [2020-11-07 06:38:37,838 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 58 states. [2020-11-07 06:38:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:52,804 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2020-11-07 06:38:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-11-07 06:38:52,806 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 155 [2020-11-07 06:38:52,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:52,807 INFO L225 Difference]: With dead ends: 170 [2020-11-07 06:38:52,808 INFO L226 Difference]: Without dead ends: 164 [2020-11-07 06:38:52,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3322 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=737, Invalid=18723, Unknown=0, NotChecked=0, Total=19460 [2020-11-07 06:38:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-11-07 06:38:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2020-11-07 06:38:52,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-11-07 06:38:52,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2020-11-07 06:38:52,851 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 155 [2020-11-07 06:38:52,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:52,852 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2020-11-07 06:38:52,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-11-07 06:38:52,852 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2020-11-07 06:38:52,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-11-07 06:38:52,853 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:52,853 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:52,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 06:38:52,854 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:52,854 INFO L82 PathProgramCache]: Analyzing trace with hash 916632710, now seen corresponding path program 28 times [2020-11-07 06:38:52,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:52,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579959881] [2020-11-07 06:38:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:56,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:38:56,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579959881] [2020-11-07 06:38:56,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:56,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-11-07 06:38:56,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910697017] [2020-11-07 06:38:56,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-11-07 06:38:56,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:56,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-11-07 06:38:56,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3395, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 06:38:56,550 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 60 states. [2020-11-07 06:39:13,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:13,017 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2020-11-07 06:39:13,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-11-07 06:39:13,019 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 160 [2020-11-07 06:39:13,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:13,020 INFO L225 Difference]: With dead ends: 175 [2020-11-07 06:39:13,021 INFO L226 Difference]: Without dead ends: 169 [2020-11-07 06:39:13,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3571 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=764, Invalid=20116, Unknown=0, NotChecked=0, Total=20880 [2020-11-07 06:39:13,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-11-07 06:39:13,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2020-11-07 06:39:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-11-07 06:39:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2020-11-07 06:39:13,077 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 160 [2020-11-07 06:39:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:13,078 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2020-11-07 06:39:13,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-11-07 06:39:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2020-11-07 06:39:13,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 06:39:13,079 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:13,079 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:13,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 06:39:13,079 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:13,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:13,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1494222423, now seen corresponding path program 29 times [2020-11-07 06:39:13,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:13,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041858715] [2020-11-07 06:39:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:17,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:17,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041858715] [2020-11-07 06:39:17,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:17,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-11-07 06:39:17,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697109335] [2020-11-07 06:39:17,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-11-07 06:39:17,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:17,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-11-07 06:39:17,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3632, Unknown=0, NotChecked=0, Total=3782 [2020-11-07 06:39:17,146 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 62 states. [2020-11-07 06:39:35,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:35,054 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2020-11-07 06:39:35,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-11-07 06:39:35,055 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 165 [2020-11-07 06:39:35,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:35,057 INFO L225 Difference]: With dead ends: 180 [2020-11-07 06:39:35,057 INFO L226 Difference]: Without dead ends: 174 [2020-11-07 06:39:35,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=791, Invalid=21559, Unknown=0, NotChecked=0, Total=22350 [2020-11-07 06:39:35,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-11-07 06:39:35,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2020-11-07 06:39:35,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-11-07 06:39:35,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2020-11-07 06:39:35,097 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 165 [2020-11-07 06:39:35,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:35,098 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2020-11-07 06:39:35,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-11-07 06:39:35,098 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2020-11-07 06:39:35,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-11-07 06:39:35,099 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:35,099 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:35,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 06:39:35,100 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:35,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:35,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1491038822, now seen corresponding path program 30 times [2020-11-07 06:39:35,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:35,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699224244] [2020-11-07 06:39:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:39,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:39,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699224244] [2020-11-07 06:39:39,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:39,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-11-07 06:39:39,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107689319] [2020-11-07 06:39:39,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-11-07 06:39:39,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:39,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-11-07 06:39:39,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3877, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 06:39:39,572 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 64 states. [2020-11-07 06:39:59,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:59,236 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2020-11-07 06:39:59,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-11-07 06:39:59,238 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 170 [2020-11-07 06:39:59,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:59,240 INFO L225 Difference]: With dead ends: 185 [2020-11-07 06:39:59,241 INFO L226 Difference]: Without dead ends: 179 [2020-11-07 06:39:59,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4096 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=818, Invalid=23052, Unknown=0, NotChecked=0, Total=23870 [2020-11-07 06:39:59,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-07 06:39:59,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2020-11-07 06:39:59,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-11-07 06:39:59,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2020-11-07 06:39:59,298 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 170 [2020-11-07 06:39:59,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:59,299 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2020-11-07 06:39:59,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-11-07 06:39:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2020-11-07 06:39:59,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-07 06:39:59,300 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:59,300 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:59,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 06:39:59,301 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:59,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:59,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1939937335, now seen corresponding path program 31 times [2020-11-07 06:39:59,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:59,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861046608] [2020-11-07 06:39:59,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:04,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:04,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861046608] [2020-11-07 06:40:04,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:04,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-11-07 06:40:04,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867947147] [2020-11-07 06:40:04,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-11-07 06:40:04,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:04,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-11-07 06:40:04,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=4130, Unknown=0, NotChecked=0, Total=4290 [2020-11-07 06:40:04,224 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 66 states. [2020-11-07 06:40:25,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:25,724 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2020-11-07 06:40:25,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-11-07 06:40:25,726 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 175 [2020-11-07 06:40:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:25,728 INFO L225 Difference]: With dead ends: 190 [2020-11-07 06:40:25,728 INFO L226 Difference]: Without dead ends: 184 [2020-11-07 06:40:25,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4372 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=845, Invalid=24595, Unknown=0, NotChecked=0, Total=25440 [2020-11-07 06:40:25,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-11-07 06:40:25,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2020-11-07 06:40:25,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-11-07 06:40:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2020-11-07 06:40:25,786 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 175 [2020-11-07 06:40:25,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:25,786 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2020-11-07 06:40:25,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-11-07 06:40:25,786 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2020-11-07 06:40:25,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-11-07 06:40:25,787 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:25,787 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:25,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 06:40:25,788 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:25,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:25,788 INFO L82 PathProgramCache]: Analyzing trace with hash 3168326, now seen corresponding path program 32 times [2020-11-07 06:40:25,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:25,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035394647] [2020-11-07 06:40:25,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:31,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:31,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035394647] [2020-11-07 06:40:31,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:31,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-11-07 06:40:31,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991917669] [2020-11-07 06:40:31,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-11-07 06:40:31,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:31,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-11-07 06:40:31,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=4391, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 06:40:31,169 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 68 states. [2020-11-07 06:40:54,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:54,533 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2020-11-07 06:40:54,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-11-07 06:40:54,534 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 180 [2020-11-07 06:40:54,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:54,536 INFO L225 Difference]: With dead ends: 195 [2020-11-07 06:40:54,537 INFO L226 Difference]: Without dead ends: 189 [2020-11-07 06:40:54,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4657 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=872, Invalid=26188, Unknown=0, NotChecked=0, Total=27060 [2020-11-07 06:40:54,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-11-07 06:40:54,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2020-11-07 06:40:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-11-07 06:40:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2020-11-07 06:40:54,620 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 180 [2020-11-07 06:40:54,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:54,620 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2020-11-07 06:40:54,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-11-07 06:40:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2020-11-07 06:40:54,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-11-07 06:40:54,622 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:54,622 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:54,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 06:40:54,623 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:54,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:54,624 INFO L82 PathProgramCache]: Analyzing trace with hash 991079913, now seen corresponding path program 33 times [2020-11-07 06:40:54,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:54,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997898383] [2020-11-07 06:40:54,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:00,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:00,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997898383] [2020-11-07 06:41:00,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:00,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-11-07 06:41:00,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500026251] [2020-11-07 06:41:00,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-11-07 06:41:00,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:00,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-11-07 06:41:00,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=4660, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 06:41:00,639 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand 70 states. [2020-11-07 06:41:26,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:26,317 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2020-11-07 06:41:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-11-07 06:41:26,318 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 185 [2020-11-07 06:41:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:26,320 INFO L225 Difference]: With dead ends: 200 [2020-11-07 06:41:26,320 INFO L226 Difference]: Without dead ends: 194 [2020-11-07 06:41:26,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=899, Invalid=27831, Unknown=0, NotChecked=0, Total=28730 [2020-11-07 06:41:26,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-11-07 06:41:26,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2020-11-07 06:41:26,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-11-07 06:41:26,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2020-11-07 06:41:26,381 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 185 [2020-11-07 06:41:26,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:26,381 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2020-11-07 06:41:26,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-11-07 06:41:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2020-11-07 06:41:26,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-11-07 06:41:26,383 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:26,383 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:26,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 06:41:26,383 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:26,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:26,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1618778586, now seen corresponding path program 34 times [2020-11-07 06:41:26,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:26,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286896148] [2020-11-07 06:41:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:32,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:32,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:32,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286896148] [2020-11-07 06:41:32,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:32,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-11-07 06:41:32,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588428111] [2020-11-07 06:41:32,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-11-07 06:41:32,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:32,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-11-07 06:41:32,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4937, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 06:41:32,937 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 72 states. [2020-11-07 06:42:00,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:00,944 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2020-11-07 06:42:00,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-11-07 06:42:00,945 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 190 [2020-11-07 06:42:00,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:00,947 INFO L225 Difference]: With dead ends: 205 [2020-11-07 06:42:00,947 INFO L226 Difference]: Without dead ends: 199 [2020-11-07 06:42:00,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5254 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=926, Invalid=29524, Unknown=0, NotChecked=0, Total=30450 [2020-11-07 06:42:00,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-07 06:42:01,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2020-11-07 06:42:01,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-11-07 06:42:01,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2020-11-07 06:42:01,004 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 190 [2020-11-07 06:42:01,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:01,004 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2020-11-07 06:42:01,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-11-07 06:42:01,005 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2020-11-07 06:42:01,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-11-07 06:42:01,006 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:01,006 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:01,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 06:42:01,006 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:01,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:01,007 INFO L82 PathProgramCache]: Analyzing trace with hash -455259127, now seen corresponding path program 35 times [2020-11-07 06:42:01,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:01,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000170433] [2020-11-07 06:42:01,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:08,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:08,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000170433] [2020-11-07 06:42:08,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:08,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-11-07 06:42:08,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227898437] [2020-11-07 06:42:08,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-11-07 06:42:08,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:08,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-11-07 06:42:08,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=5222, Unknown=0, NotChecked=0, Total=5402 [2020-11-07 06:42:08,351 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 74 states. [2020-11-07 06:42:38,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:38,917 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2020-11-07 06:42:38,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-11-07 06:42:38,919 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 195 [2020-11-07 06:42:38,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:38,921 INFO L225 Difference]: With dead ends: 210 [2020-11-07 06:42:38,921 INFO L226 Difference]: Without dead ends: 204 [2020-11-07 06:42:38,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5566 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=953, Invalid=31267, Unknown=0, NotChecked=0, Total=32220 [2020-11-07 06:42:38,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-11-07 06:42:38,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2020-11-07 06:42:38,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-11-07 06:42:38,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2020-11-07 06:42:38,986 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 195 [2020-11-07 06:42:38,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:38,987 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2020-11-07 06:42:38,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-11-07 06:42:38,987 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2020-11-07 06:42:38,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-11-07 06:42:38,988 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:38,989 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:38,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 06:42:38,989 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:38,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:38,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1481022470, now seen corresponding path program 36 times [2020-11-07 06:42:38,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:38,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423517032] [2020-11-07 06:42:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:47,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:47,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423517032] [2020-11-07 06:42:47,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:47,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-11-07 06:42:47,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188005674] [2020-11-07 06:42:47,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-11-07 06:42:47,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:47,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-11-07 06:42:47,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=5515, Unknown=0, NotChecked=0, Total=5700 [2020-11-07 06:42:47,176 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 76 states. [2020-11-07 06:43:21,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:43:21,041 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2020-11-07 06:43:21,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-11-07 06:43:21,043 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 200 [2020-11-07 06:43:21,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:43:21,045 INFO L225 Difference]: With dead ends: 215 [2020-11-07 06:43:21,045 INFO L226 Difference]: Without dead ends: 209 [2020-11-07 06:43:21,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5887 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=980, Invalid=33060, Unknown=0, NotChecked=0, Total=34040 [2020-11-07 06:43:21,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-11-07 06:43:21,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2020-11-07 06:43:21,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-11-07 06:43:21,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2020-11-07 06:43:21,123 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 200 [2020-11-07 06:43:21,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:43:21,123 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2020-11-07 06:43:21,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-11-07 06:43:21,123 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2020-11-07 06:43:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-11-07 06:43:21,125 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:43:21,125 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:43:21,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 06:43:21,125 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:43:21,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:43:21,126 INFO L82 PathProgramCache]: Analyzing trace with hash 487637545, now seen corresponding path program 37 times [2020-11-07 06:43:21,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:43:21,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118812736] [2020-11-07 06:43:21,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:43:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:30,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:43:30,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118812736] [2020-11-07 06:43:30,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:30,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-11-07 06:43:30,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140144485] [2020-11-07 06:43:30,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-11-07 06:43:30,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:30,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-11-07 06:43:30,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5816, Unknown=0, NotChecked=0, Total=6006 [2020-11-07 06:43:30,307 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 78 states. [2020-11-07 06:44:08,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:44:08,241 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2020-11-07 06:44:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-11-07 06:44:08,249 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 205 [2020-11-07 06:44:08,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:44:08,251 INFO L225 Difference]: With dead ends: 220 [2020-11-07 06:44:08,251 INFO L226 Difference]: Without dead ends: 214 [2020-11-07 06:44:08,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=1007, Invalid=34903, Unknown=0, NotChecked=0, Total=35910 [2020-11-07 06:44:08,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-11-07 06:44:08,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2020-11-07 06:44:08,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-11-07 06:44:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2020-11-07 06:44:08,329 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 205 [2020-11-07 06:44:08,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:44:08,329 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2020-11-07 06:44:08,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-11-07 06:44:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2020-11-07 06:44:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-11-07 06:44:08,330 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:44:08,330 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:44:08,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 06:44:08,331 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:44:08,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:44:08,331 INFO L82 PathProgramCache]: Analyzing trace with hash -630720026, now seen corresponding path program 38 times [2020-11-07 06:44:08,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:44:08,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897708921] [2020-11-07 06:44:08,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:44:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:18,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:44:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:44:18,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897708921] [2020-11-07 06:44:18,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:44:18,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-11-07 06:44:18,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463011984] [2020-11-07 06:44:18,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-11-07 06:44:18,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:44:18,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-11-07 06:44:18,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=6125, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 06:44:18,502 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 80 states. [2020-11-07 06:45:01,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:45:01,291 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2020-11-07 06:45:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-11-07 06:45:01,293 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 210 [2020-11-07 06:45:01,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:45:01,295 INFO L225 Difference]: With dead ends: 225 [2020-11-07 06:45:01,295 INFO L226 Difference]: Without dead ends: 219 [2020-11-07 06:45:01,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6556 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=1034, Invalid=36796, Unknown=0, NotChecked=0, Total=37830 [2020-11-07 06:45:01,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-11-07 06:45:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2020-11-07 06:45:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-11-07 06:45:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 216 transitions. [2020-11-07 06:45:01,366 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 216 transitions. Word has length 210 [2020-11-07 06:45:01,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:45:01,366 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 216 transitions. [2020-11-07 06:45:01,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-11-07 06:45:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 216 transitions. [2020-11-07 06:45:01,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-11-07 06:45:01,367 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:45:01,367 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:45:01,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 06:45:01,367 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:45:01,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:45:01,368 INFO L82 PathProgramCache]: Analyzing trace with hash -125890487, now seen corresponding path program 39 times [2020-11-07 06:45:01,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:45:01,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801862154] [2020-11-07 06:45:01,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:45:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:12,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:45:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:45:12,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801862154] [2020-11-07 06:45:12,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:45:12,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-11-07 06:45:12,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230893550] [2020-11-07 06:45:12,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-11-07 06:45:12,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:45:12,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-11-07 06:45:12,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=6442, Unknown=0, NotChecked=0, Total=6642 [2020-11-07 06:45:12,624 INFO L87 Difference]: Start difference. First operand 216 states and 216 transitions. Second operand 82 states. [2020-11-07 06:46:00,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:46:00,875 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2020-11-07 06:46:00,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-11-07 06:46:00,877 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 215 [2020-11-07 06:46:00,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:46:00,879 INFO L225 Difference]: With dead ends: 230 [2020-11-07 06:46:00,879 INFO L226 Difference]: Without dead ends: 224 [2020-11-07 06:46:00,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6904 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=1061, Invalid=38739, Unknown=0, NotChecked=0, Total=39800 [2020-11-07 06:46:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-11-07 06:46:00,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2020-11-07 06:46:00,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-11-07 06:46:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2020-11-07 06:46:00,954 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 215 [2020-11-07 06:46:00,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:46:00,955 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2020-11-07 06:46:00,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-11-07 06:46:00,955 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2020-11-07 06:46:00,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-11-07 06:46:00,956 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:46:00,956 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:46:00,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 06:46:00,956 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:46:00,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:46:00,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1146453958, now seen corresponding path program 40 times [2020-11-07 06:46:00,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:46:00,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502222806] [2020-11-07 06:46:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:46:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:13,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:46:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:46:13,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502222806] [2020-11-07 06:46:13,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:46:13,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-11-07 06:46:13,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050791557] [2020-11-07 06:46:13,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-11-07 06:46:13,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:46:13,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-11-07 06:46:13,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=6767, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 06:46:13,620 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 84 states. [2020-11-07 06:47:08,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:47:08,463 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2020-11-07 06:47:08,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-11-07 06:47:08,465 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 220 [2020-11-07 06:47:08,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:47:08,467 INFO L225 Difference]: With dead ends: 235 [2020-11-07 06:47:08,468 INFO L226 Difference]: Without dead ends: 229 [2020-11-07 06:47:08,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7261 ImplicationChecksByTransitivity, 38.4s TimeCoverageRelationStatistics Valid=1088, Invalid=40732, Unknown=0, NotChecked=0, Total=41820 [2020-11-07 06:47:08,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-11-07 06:47:08,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2020-11-07 06:47:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-11-07 06:47:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 226 transitions. [2020-11-07 06:47:08,536 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 226 transitions. Word has length 220 [2020-11-07 06:47:08,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:47:08,536 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 226 transitions. [2020-11-07 06:47:08,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-11-07 06:47:08,536 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 226 transitions. [2020-11-07 06:47:08,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-11-07 06:47:08,537 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:47:08,537 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:47:08,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 06:47:08,538 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:47:08,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:47:08,538 INFO L82 PathProgramCache]: Analyzing trace with hash 762984041, now seen corresponding path program 41 times [2020-11-07 06:47:08,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:47:08,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451025525] [2020-11-07 06:47:08,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:47:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:47:22,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:47:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:47:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:47:22,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451025525] [2020-11-07 06:47:22,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:47:22,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-11-07 06:47:22,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601187058] [2020-11-07 06:47:22,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-11-07 06:47:22,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:47:22,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-11-07 06:47:22,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=7100, Unknown=0, NotChecked=0, Total=7310 [2020-11-07 06:47:22,729 INFO L87 Difference]: Start difference. First operand 226 states and 226 transitions. Second operand 86 states. [2020-11-07 06:48:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:48:19,660 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2020-11-07 06:48:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-11-07 06:48:19,662 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 225 [2020-11-07 06:48:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:48:19,664 INFO L225 Difference]: With dead ends: 240 [2020-11-07 06:48:19,664 INFO L226 Difference]: Without dead ends: 234 [2020-11-07 06:48:19,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7627 ImplicationChecksByTransitivity, 40.9s TimeCoverageRelationStatistics Valid=1115, Invalid=42775, Unknown=0, NotChecked=0, Total=43890 [2020-11-07 06:48:19,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-11-07 06:48:19,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 231. [2020-11-07 06:48:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-11-07 06:48:19,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2020-11-07 06:48:19,742 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 225 [2020-11-07 06:48:19,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:48:19,743 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2020-11-07 06:48:19,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-11-07 06:48:19,743 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2020-11-07 06:48:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-11-07 06:48:19,744 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:48:19,744 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:48:19,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 06:48:19,745 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:48:19,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:48:19,745 INFO L82 PathProgramCache]: Analyzing trace with hash 50146726, now seen corresponding path program 42 times [2020-11-07 06:48:19,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:48:19,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660662776] [2020-11-07 06:48:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:48:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:48:31,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:48:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:48:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:48:31,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660662776] [2020-11-07 06:48:31,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:48:31,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-11-07 06:48:31,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464437457] [2020-11-07 06:48:31,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-11-07 06:48:31,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:48:31,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-11-07 06:48:31,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=7441, Unknown=0, NotChecked=0, Total=7656 [2020-11-07 06:48:31,160 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 88 states.