/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 14:54:24,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 14:54:24,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 14:54:24,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 14:54:24,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 14:54:24,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 14:54:24,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 14:54:24,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 14:54:24,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 14:54:24,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 14:54:24,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 14:54:24,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 14:54:24,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 14:54:24,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 14:54:24,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 14:54:24,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 14:54:24,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 14:54:24,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 14:54:24,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 14:54:24,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 14:54:25,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 14:54:25,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 14:54:25,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 14:54:25,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 14:54:25,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 14:54:25,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 14:54:25,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 14:54:25,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 14:54:25,027 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 14:54:25,049 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 14:54:25,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 14:54:25,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 14:54:25,053 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 14:54:25,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 14:54:25,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 14:54:25,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 14:54:25,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 14:54:25,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 14:54:25,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 14:54:25,055 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 14:54:25,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 14:54:25,055 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 14:54:25,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 14:54:25,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 14:54:25,056 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 14:54:25,056 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 14:54:25,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 14:54:25,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 14:54:25,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 14:54:25,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 14:54:25,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 14:54:25,058 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-17 14:54:25,327 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 14:54:25,339 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 14:54:25,343 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 14:54:25,344 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 14:54:25,344 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 14:54:25,345 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-07-17 14:54:25,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd3c69644/20415ce2d24e4263a2af20a305417db6/FLAG1fa388048 [2020-07-17 14:54:25,872 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 14:54:25,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-07-17 14:54:25,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd3c69644/20415ce2d24e4263a2af20a305417db6/FLAG1fa388048 [2020-07-17 14:54:26,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd3c69644/20415ce2d24e4263a2af20a305417db6 [2020-07-17 14:54:26,271 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 14:54:26,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 14:54:26,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 14:54:26,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 14:54:26,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 14:54:26,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 02:54:26" (1/1) ... [2020-07-17 14:54:26,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46f17481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:54:26, skipping insertion in model container [2020-07-17 14:54:26,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 02:54:26" (1/1) ... [2020-07-17 14:54:26,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 14:54:26,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 14:54:26,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 14:54:26,469 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 14:54:26,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 14:54:26,503 INFO L208 MainTranslator]: Completed translation [2020-07-17 14:54:26,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:54:26 WrapperNode [2020-07-17 14:54:26,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 14:54:26,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 14:54:26,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 14:54:26,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 14:54:26,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:54:26" (1/1) ... [2020-07-17 14:54:26,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:54:26" (1/1) ... [2020-07-17 14:54:26,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:54:26" (1/1) ... [2020-07-17 14:54:26,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:54:26" (1/1) ... [2020-07-17 14:54:26,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:54:26" (1/1) ... [2020-07-17 14:54:26,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:54:26" (1/1) ... [2020-07-17 14:54:26,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:54:26" (1/1) ... [2020-07-17 14:54:26,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 14:54:26,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 14:54:26,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 14:54:26,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 14:54:26,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:54:26" (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 [2020-07-17 14:54:26,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 14:54:26,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 14:54:26,691 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 14:54:26,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 14:54:26,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 14:54:26,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 14:54:26,691 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 14:54:26,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 14:54:26,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 14:54:26,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 14:54:26,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 14:54:26,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 14:54:26,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 14:54:26,942 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 14:54:26,942 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 14:54:26,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 02:54:26 BoogieIcfgContainer [2020-07-17 14:54:26,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 14:54:26,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 14:54:26,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 14:54:26,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 14:54:26,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 02:54:26" (1/3) ... [2020-07-17 14:54:26,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9d8225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 02:54:26, skipping insertion in model container [2020-07-17 14:54:26,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:54:26" (2/3) ... [2020-07-17 14:54:26,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9d8225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 02:54:26, skipping insertion in model container [2020-07-17 14:54:26,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 02:54:26" (3/3) ... [2020-07-17 14:54:26,979 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-07-17 14:54:26,989 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 14:54:26,996 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 14:54:27,008 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 14:54:27,028 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 14:54:27,028 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 14:54:27,029 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-17 14:54:27,029 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 14:54:27,029 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 14:54:27,029 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 14:54:27,029 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 14:54:27,030 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 14:54:27,044 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-17 14:54:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-17 14:54:27,054 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:27,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:54:27,058 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:27,066 INFO L82 PathProgramCache]: Analyzing trace with hash -439118320, now seen corresponding path program 1 times [2020-07-17 14:54:27,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:27,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880746408] [2020-07-17 14:54:27,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:27,267 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:27,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880746408] [2020-07-17 14:54:27,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:27,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 14:54:27,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116422032] [2020-07-17 14:54:27,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 14:54:27,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:27,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 14:54:27,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 14:54:27,296 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-07-17 14:54:27,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:27,405 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-07-17 14:54:27,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 14:54:27,408 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-17 14:54:27,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:27,419 INFO L225 Difference]: With dead ends: 45 [2020-07-17 14:54:27,419 INFO L226 Difference]: Without dead ends: 21 [2020-07-17 14:54:27,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 14:54:27,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-17 14:54:27,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-17 14:54:27,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-17 14:54:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-07-17 14:54:27,492 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-07-17 14:54:27,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:27,493 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-07-17 14:54:27,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 14:54:27,493 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-07-17 14:54:27,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-17 14:54:27,495 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:27,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:54:27,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 14:54:27,497 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:27,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:27,498 INFO L82 PathProgramCache]: Analyzing trace with hash -696780679, now seen corresponding path program 1 times [2020-07-17 14:54:27,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:27,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823775966] [2020-07-17 14:54:27,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:27,674 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:27,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823775966] [2020-07-17 14:54:27,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:27,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 14:54:27,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730210807] [2020-07-17 14:54:27,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 14:54:27,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:27,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 14:54:27,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 14:54:27,678 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 4 states. [2020-07-17 14:54:27,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:27,743 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-07-17 14:54:27,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 14:54:27,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-17 14:54:27,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:27,745 INFO L225 Difference]: With dead ends: 31 [2020-07-17 14:54:27,745 INFO L226 Difference]: Without dead ends: 25 [2020-07-17 14:54:27,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 14:54:27,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-17 14:54:27,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-07-17 14:54:27,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-17 14:54:27,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-07-17 14:54:27,756 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-07-17 14:54:27,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:27,757 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-07-17 14:54:27,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 14:54:27,757 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-07-17 14:54:27,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 14:54:27,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:27,759 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] [2020-07-17 14:54:27,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 14:54:27,759 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:27,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:27,760 INFO L82 PathProgramCache]: Analyzing trace with hash 908018199, now seen corresponding path program 1 times [2020-07-17 14:54:27,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:27,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637492716] [2020-07-17 14:54:27,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:27,879 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:27,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637492716] [2020-07-17 14:54:27,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:27,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 14:54:27,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674855432] [2020-07-17 14:54:27,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 14:54:27,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:27,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 14:54:27,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 14:54:27,882 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2020-07-17 14:54:27,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:27,981 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-07-17 14:54:27,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 14:54:27,982 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-07-17 14:54:27,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:27,983 INFO L225 Difference]: With dead ends: 36 [2020-07-17 14:54:27,983 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 14:54:27,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-17 14:54:27,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 14:54:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-17 14:54:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-17 14:54:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-17 14:54:27,993 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-07-17 14:54:27,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:27,994 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-17 14:54:27,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 14:54:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-17 14:54:27,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-17 14:54:27,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:27,996 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] [2020-07-17 14:54:27,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 14:54:27,996 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:27,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:27,997 INFO L82 PathProgramCache]: Analyzing trace with hash 641420089, now seen corresponding path program 2 times [2020-07-17 14:54:27,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:27,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275755167] [2020-07-17 14:54:27,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:28,107 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:28,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275755167] [2020-07-17 14:54:28,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:28,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 14:54:28,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983462451] [2020-07-17 14:54:28,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 14:54:28,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:28,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 14:54:28,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 14:54:28,110 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2020-07-17 14:54:28,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:28,257 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-07-17 14:54:28,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 14:54:28,258 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-07-17 14:54:28,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:28,259 INFO L225 Difference]: With dead ends: 41 [2020-07-17 14:54:28,259 INFO L226 Difference]: Without dead ends: 35 [2020-07-17 14:54:28,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-17 14:54:28,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-17 14:54:28,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-17 14:54:28,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-17 14:54:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-07-17 14:54:28,269 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-07-17 14:54:28,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:28,270 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-07-17 14:54:28,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 14:54:28,270 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-07-17 14:54:28,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 14:54:28,271 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:28,272 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] [2020-07-17 14:54:28,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 14:54:28,272 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:28,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:28,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2101454679, now seen corresponding path program 3 times [2020-07-17 14:54:28,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:28,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756384000] [2020-07-17 14:54:28,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:28,388 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:28,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756384000] [2020-07-17 14:54:28,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:28,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-17 14:54:28,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438561022] [2020-07-17 14:54:28,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 14:54:28,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:28,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 14:54:28,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-17 14:54:28,391 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 10 states. [2020-07-17 14:54:28,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:28,538 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-07-17 14:54:28,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 14:54:28,538 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-17 14:54:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:28,540 INFO L225 Difference]: With dead ends: 46 [2020-07-17 14:54:28,540 INFO L226 Difference]: Without dead ends: 40 [2020-07-17 14:54:28,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-07-17 14:54:28,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-17 14:54:28,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-07-17 14:54:28,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-17 14:54:28,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-07-17 14:54:28,548 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-07-17 14:54:28,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:28,549 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-07-17 14:54:28,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 14:54:28,549 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-07-17 14:54:28,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-17 14:54:28,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:28,552 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] [2020-07-17 14:54:28,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 14:54:28,552 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:28,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:28,553 INFO L82 PathProgramCache]: Analyzing trace with hash -888787463, now seen corresponding path program 4 times [2020-07-17 14:54:28,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:28,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504028103] [2020-07-17 14:54:28,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:28,720 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:28,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504028103] [2020-07-17 14:54:28,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:28,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-17 14:54:28,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892688499] [2020-07-17 14:54:28,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 14:54:28,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:28,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 14:54:28,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-07-17 14:54:28,723 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 12 states. [2020-07-17 14:54:28,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:28,920 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-07-17 14:54:28,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 14:54:28,921 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-07-17 14:54:28,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:28,922 INFO L225 Difference]: With dead ends: 51 [2020-07-17 14:54:28,922 INFO L226 Difference]: Without dead ends: 45 [2020-07-17 14:54:28,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-07-17 14:54:28,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-17 14:54:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-07-17 14:54:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 14:54:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-07-17 14:54:28,939 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-07-17 14:54:28,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:28,939 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-07-17 14:54:28,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 14:54:28,939 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-07-17 14:54:28,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-17 14:54:28,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:28,941 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] [2020-07-17 14:54:28,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 14:54:28,941 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:28,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:28,944 INFO L82 PathProgramCache]: Analyzing trace with hash 899054743, now seen corresponding path program 5 times [2020-07-17 14:54:28,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:28,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790147186] [2020-07-17 14:54:28,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:29,155 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:29,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790147186] [2020-07-17 14:54:29,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:29,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-17 14:54:29,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506634711] [2020-07-17 14:54:29,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 14:54:29,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:29,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 14:54:29,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-07-17 14:54:29,158 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 14 states. [2020-07-17 14:54:29,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:29,390 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-07-17 14:54:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 14:54:29,390 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-07-17 14:54:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:29,391 INFO L225 Difference]: With dead ends: 56 [2020-07-17 14:54:29,391 INFO L226 Difference]: Without dead ends: 50 [2020-07-17 14:54:29,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-07-17 14:54:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-17 14:54:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-07-17 14:54:29,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-17 14:54:29,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-07-17 14:54:29,405 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-07-17 14:54:29,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:29,406 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-07-17 14:54:29,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 14:54:29,407 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-07-17 14:54:29,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-17 14:54:29,410 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:29,410 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] [2020-07-17 14:54:29,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 14:54:29,410 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:29,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:29,411 INFO L82 PathProgramCache]: Analyzing trace with hash 212115641, now seen corresponding path program 6 times [2020-07-17 14:54:29,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:29,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190714203] [2020-07-17 14:54:29,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:29,601 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:29,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190714203] [2020-07-17 14:54:29,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:29,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-07-17 14:54:29,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956157047] [2020-07-17 14:54:29,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-17 14:54:29,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:29,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-17 14:54:29,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-07-17 14:54:29,604 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 16 states. [2020-07-17 14:54:29,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:29,873 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-07-17 14:54:29,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-17 14:54:29,874 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-07-17 14:54:29,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:29,875 INFO L225 Difference]: With dead ends: 61 [2020-07-17 14:54:29,875 INFO L226 Difference]: Without dead ends: 55 [2020-07-17 14:54:29,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-07-17 14:54:29,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-17 14:54:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-07-17 14:54:29,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-17 14:54:29,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-07-17 14:54:29,883 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-07-17 14:54:29,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:29,884 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-07-17 14:54:29,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-17 14:54:29,884 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-07-17 14:54:29,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-17 14:54:29,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:29,885 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] [2020-07-17 14:54:29,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 14:54:29,886 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:29,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:29,886 INFO L82 PathProgramCache]: Analyzing trace with hash 382845399, now seen corresponding path program 7 times [2020-07-17 14:54:29,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:29,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467796776] [2020-07-17 14:54:29,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:30,124 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:30,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467796776] [2020-07-17 14:54:30,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:30,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-07-17 14:54:30,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835466569] [2020-07-17 14:54:30,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-17 14:54:30,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:30,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-17 14:54:30,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-07-17 14:54:30,127 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 18 states. [2020-07-17 14:54:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:30,441 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-07-17 14:54:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-17 14:54:30,441 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-07-17 14:54:30,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:30,442 INFO L225 Difference]: With dead ends: 66 [2020-07-17 14:54:30,442 INFO L226 Difference]: Without dead ends: 60 [2020-07-17 14:54:30,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-07-17 14:54:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-17 14:54:30,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-07-17 14:54:30,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-17 14:54:30,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-07-17 14:54:30,451 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-07-17 14:54:30,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:30,451 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-07-17 14:54:30,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-17 14:54:30,451 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-07-17 14:54:30,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-17 14:54:30,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:30,452 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] [2020-07-17 14:54:30,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 14:54:30,453 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:30,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:30,453 INFO L82 PathProgramCache]: Analyzing trace with hash -471686279, now seen corresponding path program 8 times [2020-07-17 14:54:30,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:30,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306223135] [2020-07-17 14:54:30,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:30,672 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:30,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306223135] [2020-07-17 14:54:30,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:30,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-07-17 14:54:30,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282376280] [2020-07-17 14:54:30,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-17 14:54:30,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:30,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-17 14:54:30,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-07-17 14:54:30,674 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 20 states. [2020-07-17 14:54:31,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:31,092 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-07-17 14:54:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-17 14:54:31,092 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-07-17 14:54:31,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:31,094 INFO L225 Difference]: With dead ends: 71 [2020-07-17 14:54:31,094 INFO L226 Difference]: Without dead ends: 65 [2020-07-17 14:54:31,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-07-17 14:54:31,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-17 14:54:31,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-07-17 14:54:31,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-17 14:54:31,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-07-17 14:54:31,106 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-07-17 14:54:31,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:31,106 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-07-17 14:54:31,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-17 14:54:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-07-17 14:54:31,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-17 14:54:31,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:31,107 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] [2020-07-17 14:54:31,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 14:54:31,107 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:31,108 INFO L82 PathProgramCache]: Analyzing trace with hash -945326313, now seen corresponding path program 9 times [2020-07-17 14:54:31,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:31,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522510383] [2020-07-17 14:54:31,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:31,357 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:31,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522510383] [2020-07-17 14:54:31,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:31,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-07-17 14:54:31,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811889542] [2020-07-17 14:54:31,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-17 14:54:31,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:31,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-17 14:54:31,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-07-17 14:54:31,361 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 22 states. [2020-07-17 14:54:31,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:31,863 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-07-17 14:54:31,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-17 14:54:31,864 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-07-17 14:54:31,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:31,865 INFO L225 Difference]: With dead ends: 76 [2020-07-17 14:54:31,865 INFO L226 Difference]: Without dead ends: 70 [2020-07-17 14:54:31,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-07-17 14:54:31,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-17 14:54:31,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-07-17 14:54:31,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-17 14:54:31,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-07-17 14:54:31,877 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-07-17 14:54:31,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:31,878 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-07-17 14:54:31,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-17 14:54:31,878 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-07-17 14:54:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-17 14:54:31,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:31,880 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] [2020-07-17 14:54:31,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 14:54:31,881 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:31,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:31,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1165216199, now seen corresponding path program 10 times [2020-07-17 14:54:31,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:31,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138119268] [2020-07-17 14:54:31,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:32,211 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:32,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138119268] [2020-07-17 14:54:32,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:32,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-07-17 14:54:32,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195483252] [2020-07-17 14:54:32,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-17 14:54:32,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:32,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-17 14:54:32,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-07-17 14:54:32,214 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 24 states. [2020-07-17 14:54:32,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:32,749 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-07-17 14:54:32,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-17 14:54:32,749 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-07-17 14:54:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:32,750 INFO L225 Difference]: With dead ends: 81 [2020-07-17 14:54:32,750 INFO L226 Difference]: Without dead ends: 75 [2020-07-17 14:54:32,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-07-17 14:54:32,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-17 14:54:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-07-17 14:54:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-17 14:54:32,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-07-17 14:54:32,772 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 66 [2020-07-17 14:54:32,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:32,772 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-07-17 14:54:32,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-17 14:54:32,772 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-07-17 14:54:32,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-07-17 14:54:32,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:32,777 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] [2020-07-17 14:54:32,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 14:54:32,777 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:32,778 INFO L82 PathProgramCache]: Analyzing trace with hash 499883095, now seen corresponding path program 11 times [2020-07-17 14:54:32,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:32,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040728103] [2020-07-17 14:54:32,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:33,117 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:33,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040728103] [2020-07-17 14:54:33,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:33,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-07-17 14:54:33,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81196965] [2020-07-17 14:54:33,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-17 14:54:33,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:33,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-17 14:54:33,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-07-17 14:54:33,120 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 26 states. [2020-07-17 14:54:33,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:33,702 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-07-17 14:54:33,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-17 14:54:33,703 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2020-07-17 14:54:33,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:33,704 INFO L225 Difference]: With dead ends: 86 [2020-07-17 14:54:33,704 INFO L226 Difference]: Without dead ends: 80 [2020-07-17 14:54:33,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-07-17 14:54:33,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-17 14:54:33,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-07-17 14:54:33,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-17 14:54:33,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-07-17 14:54:33,714 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 71 [2020-07-17 14:54:33,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:33,715 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-07-17 14:54:33,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-17 14:54:33,715 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-07-17 14:54:33,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-17 14:54:33,720 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:33,720 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] [2020-07-17 14:54:33,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 14:54:33,721 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:33,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:33,721 INFO L82 PathProgramCache]: Analyzing trace with hash 728586489, now seen corresponding path program 12 times [2020-07-17 14:54:33,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:33,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964618073] [2020-07-17 14:54:33,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:34,153 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:34,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964618073] [2020-07-17 14:54:34,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:34,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-07-17 14:54:34,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743900332] [2020-07-17 14:54:34,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-17 14:54:34,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:34,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-17 14:54:34,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-07-17 14:54:34,156 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 28 states. [2020-07-17 14:54:34,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:34,740 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-07-17 14:54:34,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-17 14:54:34,743 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 76 [2020-07-17 14:54:34,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:34,744 INFO L225 Difference]: With dead ends: 91 [2020-07-17 14:54:34,744 INFO L226 Difference]: Without dead ends: 85 [2020-07-17 14:54:34,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-07-17 14:54:34,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-17 14:54:34,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-07-17 14:54:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-17 14:54:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-07-17 14:54:34,756 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 76 [2020-07-17 14:54:34,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:34,757 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-07-17 14:54:34,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-17 14:54:34,757 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-07-17 14:54:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-17 14:54:34,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:34,758 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] [2020-07-17 14:54:34,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 14:54:34,759 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:34,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:34,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1576153495, now seen corresponding path program 13 times [2020-07-17 14:54:34,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:34,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448561940] [2020-07-17 14:54:34,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:35,192 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:35,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448561940] [2020-07-17 14:54:35,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:35,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-07-17 14:54:35,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161536802] [2020-07-17 14:54:35,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-17 14:54:35,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:35,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-17 14:54:35,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-07-17 14:54:35,195 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 30 states. [2020-07-17 14:54:35,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:35,949 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-07-17 14:54:35,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-17 14:54:35,950 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 81 [2020-07-17 14:54:35,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:35,951 INFO L225 Difference]: With dead ends: 96 [2020-07-17 14:54:35,951 INFO L226 Difference]: Without dead ends: 90 [2020-07-17 14:54:35,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-07-17 14:54:35,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-17 14:54:35,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-07-17 14:54:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-17 14:54:35,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-07-17 14:54:35,970 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 81 [2020-07-17 14:54:35,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:35,971 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-07-17 14:54:35,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-17 14:54:35,972 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-07-17 14:54:35,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-17 14:54:35,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:35,977 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] [2020-07-17 14:54:35,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 14:54:35,977 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:35,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:35,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1034810439, now seen corresponding path program 14 times [2020-07-17 14:54:35,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:35,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753855310] [2020-07-17 14:54:35,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:36,485 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:36,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753855310] [2020-07-17 14:54:36,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:36,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-07-17 14:54:36,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345453913] [2020-07-17 14:54:36,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-17 14:54:36,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:36,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-17 14:54:36,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-07-17 14:54:36,488 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 32 states. [2020-07-17 14:54:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:37,271 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2020-07-17 14:54:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-17 14:54:37,273 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 86 [2020-07-17 14:54:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:37,274 INFO L225 Difference]: With dead ends: 101 [2020-07-17 14:54:37,274 INFO L226 Difference]: Without dead ends: 95 [2020-07-17 14:54:37,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-07-17 14:54:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-17 14:54:37,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-07-17 14:54:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-17 14:54:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-07-17 14:54:37,283 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 86 [2020-07-17 14:54:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:37,284 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-07-17 14:54:37,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-17 14:54:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-07-17 14:54:37,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-17 14:54:37,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:37,285 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] [2020-07-17 14:54:37,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 14:54:37,286 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:37,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:37,286 INFO L82 PathProgramCache]: Analyzing trace with hash 2077177559, now seen corresponding path program 15 times [2020-07-17 14:54:37,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:37,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439607403] [2020-07-17 14:54:37,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:37,858 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:37,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439607403] [2020-07-17 14:54:37,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:37,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-07-17 14:54:37,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090455] [2020-07-17 14:54:37,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-17 14:54:37,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:37,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-17 14:54:37,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 14:54:37,863 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 34 states. [2020-07-17 14:54:38,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:38,804 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-07-17 14:54:38,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-07-17 14:54:38,804 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 91 [2020-07-17 14:54:38,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:38,805 INFO L225 Difference]: With dead ends: 106 [2020-07-17 14:54:38,805 INFO L226 Difference]: Without dead ends: 100 [2020-07-17 14:54:38,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-07-17 14:54:38,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-17 14:54:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-07-17 14:54:38,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-17 14:54:38,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-07-17 14:54:38,814 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 91 [2020-07-17 14:54:38,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:38,814 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-07-17 14:54:38,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-17 14:54:38,814 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-07-17 14:54:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-17 14:54:38,815 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:38,816 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] [2020-07-17 14:54:38,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 14:54:38,816 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:38,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:38,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1140437383, now seen corresponding path program 16 times [2020-07-17 14:54:38,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:38,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455913877] [2020-07-17 14:54:38,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:39,535 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:39,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455913877] [2020-07-17 14:54:39,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:39,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-07-17 14:54:39,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626555278] [2020-07-17 14:54:39,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-17 14:54:39,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:39,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-17 14:54:39,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-07-17 14:54:39,538 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 36 states. [2020-07-17 14:54:40,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:40,759 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-07-17 14:54:40,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-07-17 14:54:40,760 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 96 [2020-07-17 14:54:40,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:40,761 INFO L225 Difference]: With dead ends: 111 [2020-07-17 14:54:40,761 INFO L226 Difference]: Without dead ends: 105 [2020-07-17 14:54:40,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-07-17 14:54:40,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-17 14:54:40,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-07-17 14:54:40,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-17 14:54:40,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-07-17 14:54:40,771 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 96 [2020-07-17 14:54:40,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:40,771 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-07-17 14:54:40,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-17 14:54:40,771 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-07-17 14:54:40,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-17 14:54:40,774 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:40,775 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] [2020-07-17 14:54:40,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 14:54:40,775 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:40,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:40,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1511435287, now seen corresponding path program 17 times [2020-07-17 14:54:40,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:40,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089772290] [2020-07-17 14:54:40,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:41,473 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:41,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089772290] [2020-07-17 14:54:41,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:41,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-07-17 14:54:41,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313651131] [2020-07-17 14:54:41,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-17 14:54:41,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:41,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-17 14:54:41,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-07-17 14:54:41,478 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 38 states. [2020-07-17 14:54:42,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:42,542 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-07-17 14:54:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-17 14:54:42,543 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 101 [2020-07-17 14:54:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:42,544 INFO L225 Difference]: With dead ends: 116 [2020-07-17 14:54:42,544 INFO L226 Difference]: Without dead ends: 110 [2020-07-17 14:54:42,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-07-17 14:54:42,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-17 14:54:42,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-07-17 14:54:42,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-17 14:54:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-07-17 14:54:42,554 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 101 [2020-07-17 14:54:42,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:42,554 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-07-17 14:54:42,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-17 14:54:42,555 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-07-17 14:54:42,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-17 14:54:42,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:42,556 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] [2020-07-17 14:54:42,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-17 14:54:42,556 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:42,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:42,558 INFO L82 PathProgramCache]: Analyzing trace with hash -967433927, now seen corresponding path program 18 times [2020-07-17 14:54:42,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:42,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299744387] [2020-07-17 14:54:42,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:43,269 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:43,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299744387] [2020-07-17 14:54:43,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:43,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-07-17 14:54:43,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298278570] [2020-07-17 14:54:43,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-17 14:54:43,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:43,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-17 14:54:43,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-07-17 14:54:43,272 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 40 states. [2020-07-17 14:54:44,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:44,453 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2020-07-17 14:54:44,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-07-17 14:54:44,454 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 106 [2020-07-17 14:54:44,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:44,455 INFO L225 Difference]: With dead ends: 121 [2020-07-17 14:54:44,455 INFO L226 Difference]: Without dead ends: 115 [2020-07-17 14:54:44,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-07-17 14:54:44,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-07-17 14:54:44,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-07-17 14:54:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-17 14:54:44,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2020-07-17 14:54:44,464 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 106 [2020-07-17 14:54:44,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:44,465 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2020-07-17 14:54:44,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-17 14:54:44,465 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2020-07-17 14:54:44,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-07-17 14:54:44,466 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:44,466 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] [2020-07-17 14:54:44,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-17 14:54:44,467 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:44,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:44,467 INFO L82 PathProgramCache]: Analyzing trace with hash 175935831, now seen corresponding path program 19 times [2020-07-17 14:54:44,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:44,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193380516] [2020-07-17 14:54:44,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:45,279 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:45,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193380516] [2020-07-17 14:54:45,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:45,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-07-17 14:54:45,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560788719] [2020-07-17 14:54:45,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-17 14:54:45,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:45,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-17 14:54:45,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-07-17 14:54:45,281 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 42 states. [2020-07-17 14:54:46,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:46,520 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-07-17 14:54:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-07-17 14:54:46,521 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 111 [2020-07-17 14:54:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:46,523 INFO L225 Difference]: With dead ends: 126 [2020-07-17 14:54:46,523 INFO L226 Difference]: Without dead ends: 120 [2020-07-17 14:54:46,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-07-17 14:54:46,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-17 14:54:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-07-17 14:54:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-17 14:54:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-07-17 14:54:46,531 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 111 [2020-07-17 14:54:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:46,531 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-07-17 14:54:46,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-17 14:54:46,531 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-07-17 14:54:46,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-07-17 14:54:46,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:46,533 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] [2020-07-17 14:54:46,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-17 14:54:46,533 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:46,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:46,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1072856071, now seen corresponding path program 20 times [2020-07-17 14:54:46,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:46,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273631577] [2020-07-17 14:54:46,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:47,357 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:47,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273631577] [2020-07-17 14:54:47,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:47,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-07-17 14:54:47,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362203153] [2020-07-17 14:54:47,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-17 14:54:47,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:47,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-17 14:54:47,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-07-17 14:54:47,359 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 44 states. [2020-07-17 14:54:48,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:48,848 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2020-07-17 14:54:48,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-07-17 14:54:48,851 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 116 [2020-07-17 14:54:48,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:48,853 INFO L225 Difference]: With dead ends: 131 [2020-07-17 14:54:48,853 INFO L226 Difference]: Without dead ends: 125 [2020-07-17 14:54:48,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-07-17 14:54:48,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-17 14:54:48,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-07-17 14:54:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-17 14:54:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2020-07-17 14:54:48,863 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 116 [2020-07-17 14:54:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:48,864 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2020-07-17 14:54:48,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-17 14:54:48,864 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2020-07-17 14:54:48,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-17 14:54:48,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:48,865 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] [2020-07-17 14:54:48,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-17 14:54:48,866 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:48,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:48,866 INFO L82 PathProgramCache]: Analyzing trace with hash 229959319, now seen corresponding path program 21 times [2020-07-17 14:54:48,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:48,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624350671] [2020-07-17 14:54:48,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:49,807 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:49,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624350671] [2020-07-17 14:54:49,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:49,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-07-17 14:54:49,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133797013] [2020-07-17 14:54:49,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-17 14:54:49,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:49,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-17 14:54:49,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-07-17 14:54:49,810 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 46 states. [2020-07-17 14:54:51,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:51,377 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-07-17 14:54:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-07-17 14:54:51,377 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 121 [2020-07-17 14:54:51,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:51,379 INFO L225 Difference]: With dead ends: 136 [2020-07-17 14:54:51,380 INFO L226 Difference]: Without dead ends: 130 [2020-07-17 14:54:51,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-07-17 14:54:51,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-07-17 14:54:51,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-07-17 14:54:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-07-17 14:54:51,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-07-17 14:54:51,387 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 121 [2020-07-17 14:54:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:51,388 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-07-17 14:54:51,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-17 14:54:51,388 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-07-17 14:54:51,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-17 14:54:51,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:51,389 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] [2020-07-17 14:54:51,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-17 14:54:51,389 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:51,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:51,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2029549241, now seen corresponding path program 22 times [2020-07-17 14:54:51,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:51,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610846574] [2020-07-17 14:54:51,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:52,417 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:52,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610846574] [2020-07-17 14:54:52,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:52,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-07-17 14:54:52,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000056445] [2020-07-17 14:54:52,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-17 14:54:52,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:52,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-17 14:54:52,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-07-17 14:54:52,420 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 48 states. [2020-07-17 14:54:54,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:54,195 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2020-07-17 14:54:54,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-07-17 14:54:54,196 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 126 [2020-07-17 14:54:54,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:54,197 INFO L225 Difference]: With dead ends: 141 [2020-07-17 14:54:54,198 INFO L226 Difference]: Without dead ends: 135 [2020-07-17 14:54:54,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-07-17 14:54:54,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-17 14:54:54,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-07-17 14:54:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-17 14:54:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2020-07-17 14:54:54,205 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 126 [2020-07-17 14:54:54,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:54,206 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2020-07-17 14:54:54,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-17 14:54:54,206 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2020-07-17 14:54:54,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-17 14:54:54,207 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:54,207 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] [2020-07-17 14:54:54,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-17 14:54:54,208 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:54,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:54,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1821135913, now seen corresponding path program 23 times [2020-07-17 14:54:54,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:54,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104359453] [2020-07-17 14:54:54,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:55,292 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:55,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104359453] [2020-07-17 14:54:55,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:55,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-07-17 14:54:55,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074880169] [2020-07-17 14:54:55,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-17 14:54:55,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:55,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-17 14:54:55,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-07-17 14:54:55,294 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 50 states. [2020-07-17 14:54:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:54:57,178 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-07-17 14:54:57,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-07-17 14:54:57,178 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 131 [2020-07-17 14:54:57,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:54:57,180 INFO L225 Difference]: With dead ends: 146 [2020-07-17 14:54:57,180 INFO L226 Difference]: Without dead ends: 140 [2020-07-17 14:54:57,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-07-17 14:54:57,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-17 14:54:57,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-07-17 14:54:57,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-17 14:54:57,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-07-17 14:54:57,190 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 131 [2020-07-17 14:54:57,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:54:57,190 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-07-17 14:54:57,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-17 14:54:57,190 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-07-17 14:54:57,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-17 14:54:57,192 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:54:57,192 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] [2020-07-17 14:54:57,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-17 14:54:57,192 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:54:57,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:54:57,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1910700409, now seen corresponding path program 24 times [2020-07-17 14:54:57,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:54:57,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199028679] [2020-07-17 14:54:57,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:54:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:54:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:54:58,727 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:54:58,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199028679] [2020-07-17 14:54:58,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:54:58,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-07-17 14:54:58,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194297353] [2020-07-17 14:54:58,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-17 14:54:58,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:54:58,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-17 14:54:58,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-07-17 14:54:58,731 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 52 states. [2020-07-17 14:55:01,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:01,001 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2020-07-17 14:55:01,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-07-17 14:55:01,002 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 136 [2020-07-17 14:55:01,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:01,004 INFO L225 Difference]: With dead ends: 151 [2020-07-17 14:55:01,004 INFO L226 Difference]: Without dead ends: 145 [2020-07-17 14:55:01,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-07-17 14:55:01,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-17 14:55:01,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-07-17 14:55:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-17 14:55:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2020-07-17 14:55:01,011 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 136 [2020-07-17 14:55:01,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:01,012 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2020-07-17 14:55:01,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-17 14:55:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2020-07-17 14:55:01,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-17 14:55:01,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:01,013 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] [2020-07-17 14:55:01,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-17 14:55:01,014 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:01,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:01,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1167269609, now seen corresponding path program 25 times [2020-07-17 14:55:01,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:01,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172454599] [2020-07-17 14:55:01,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:02,272 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:02,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172454599] [2020-07-17 14:55:02,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:02,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2020-07-17 14:55:02,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999057829] [2020-07-17 14:55:02,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-17 14:55:02,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:02,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-17 14:55:02,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-07-17 14:55:02,275 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 54 states. [2020-07-17 14:55:04,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:04,406 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-07-17 14:55:04,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-07-17 14:55:04,406 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 141 [2020-07-17 14:55:04,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:04,408 INFO L225 Difference]: With dead ends: 156 [2020-07-17 14:55:04,408 INFO L226 Difference]: Without dead ends: 150 [2020-07-17 14:55:04,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-07-17 14:55:04,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-17 14:55:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-07-17 14:55:04,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-17 14:55:04,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-07-17 14:55:04,416 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 141 [2020-07-17 14:55:04,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:04,416 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-07-17 14:55:04,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-17 14:55:04,417 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-07-17 14:55:04,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-07-17 14:55:04,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:04,418 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] [2020-07-17 14:55:04,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-17 14:55:04,418 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:04,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:04,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1667691463, now seen corresponding path program 26 times [2020-07-17 14:55:04,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:04,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115052009] [2020-07-17 14:55:04,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:05,759 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:05,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115052009] [2020-07-17 14:55:05,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:05,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-07-17 14:55:05,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121504443] [2020-07-17 14:55:05,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-17 14:55:05,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:05,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-17 14:55:05,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-07-17 14:55:05,762 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 56 states. [2020-07-17 14:55:08,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:08,055 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2020-07-17 14:55:08,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-07-17 14:55:08,056 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 146 [2020-07-17 14:55:08,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:08,057 INFO L225 Difference]: With dead ends: 161 [2020-07-17 14:55:08,058 INFO L226 Difference]: Without dead ends: 155 [2020-07-17 14:55:08,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-07-17 14:55:08,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-17 14:55:08,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-07-17 14:55:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-17 14:55:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2020-07-17 14:55:08,067 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 146 [2020-07-17 14:55:08,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:08,067 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2020-07-17 14:55:08,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-17 14:55:08,068 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2020-07-17 14:55:08,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-17 14:55:08,068 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:08,069 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] [2020-07-17 14:55:08,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-17 14:55:08,069 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:08,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:08,069 INFO L82 PathProgramCache]: Analyzing trace with hash -799766953, now seen corresponding path program 27 times [2020-07-17 14:55:08,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:08,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319662266] [2020-07-17 14:55:08,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:09,535 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:09,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319662266] [2020-07-17 14:55:09,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:09,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2020-07-17 14:55:09,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117496856] [2020-07-17 14:55:09,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-07-17 14:55:09,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:09,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-07-17 14:55:09,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-07-17 14:55:09,537 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 58 states. [2020-07-17 14:55:11,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:11,908 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-07-17 14:55:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-07-17 14:55:11,908 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 151 [2020-07-17 14:55:11,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:11,910 INFO L225 Difference]: With dead ends: 166 [2020-07-17 14:55:11,910 INFO L226 Difference]: Without dead ends: 160 [2020-07-17 14:55:11,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3920, Invalid=8512, Unknown=0, NotChecked=0, Total=12432 [2020-07-17 14:55:11,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-17 14:55:11,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-07-17 14:55:11,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-17 14:55:11,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-07-17 14:55:11,918 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 151 [2020-07-17 14:55:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:11,918 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-07-17 14:55:11,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-07-17 14:55:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-07-17 14:55:11,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-07-17 14:55:11,919 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:11,919 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] [2020-07-17 14:55:11,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-07-17 14:55:11,920 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:11,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:11,920 INFO L82 PathProgramCache]: Analyzing trace with hash 468102905, now seen corresponding path program 28 times [2020-07-17 14:55:11,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:11,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711537588] [2020-07-17 14:55:11,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:13,513 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:13,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711537588] [2020-07-17 14:55:13,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:13,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-07-17 14:55:13,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555076087] [2020-07-17 14:55:13,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-17 14:55:13,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:13,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-17 14:55:13,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-07-17 14:55:13,515 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 60 states. [2020-07-17 14:55:16,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:16,082 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2020-07-17 14:55:16,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-07-17 14:55:16,083 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 156 [2020-07-17 14:55:16,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:16,085 INFO L225 Difference]: With dead ends: 171 [2020-07-17 14:55:16,085 INFO L226 Difference]: Without dead ends: 165 [2020-07-17 14:55:16,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-07-17 14:55:16,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-17 14:55:16,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-07-17 14:55:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-17 14:55:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2020-07-17 14:55:16,093 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 156 [2020-07-17 14:55:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:16,093 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2020-07-17 14:55:16,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-17 14:55:16,093 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2020-07-17 14:55:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-07-17 14:55:16,094 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:16,095 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] [2020-07-17 14:55:16,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-07-17 14:55:16,095 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:16,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:16,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1847682153, now seen corresponding path program 29 times [2020-07-17 14:55:16,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:16,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943103816] [2020-07-17 14:55:16,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:17,859 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:17,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943103816] [2020-07-17 14:55:17,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:17,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2020-07-17 14:55:17,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258648754] [2020-07-17 14:55:17,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-17 14:55:17,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:17,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-17 14:55:17,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2020-07-17 14:55:17,861 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 62 states. [2020-07-17 14:55:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:20,792 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2020-07-17 14:55:20,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-07-17 14:55:20,793 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 161 [2020-07-17 14:55:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:20,795 INFO L225 Difference]: With dead ends: 176 [2020-07-17 14:55:20,796 INFO L226 Difference]: Without dead ends: 170 [2020-07-17 14:55:20,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4500, Invalid=9780, Unknown=0, NotChecked=0, Total=14280 [2020-07-17 14:55:20,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-17 14:55:20,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-07-17 14:55:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-07-17 14:55:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-07-17 14:55:20,803 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 161 [2020-07-17 14:55:20,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:20,804 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-07-17 14:55:20,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-17 14:55:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-07-17 14:55:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-07-17 14:55:20,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:20,805 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] [2020-07-17 14:55:20,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-17 14:55:20,806 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:20,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:20,806 INFO L82 PathProgramCache]: Analyzing trace with hash 60285369, now seen corresponding path program 30 times [2020-07-17 14:55:20,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:20,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865401155] [2020-07-17 14:55:20,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:22,648 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:22,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865401155] [2020-07-17 14:55:22,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:22,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2020-07-17 14:55:22,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710146769] [2020-07-17 14:55:22,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-17 14:55:22,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:22,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-17 14:55:22,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-07-17 14:55:22,650 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 64 states. [2020-07-17 14:55:25,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:25,676 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2020-07-17 14:55:25,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-07-17 14:55:25,677 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 166 [2020-07-17 14:55:25,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:25,679 INFO L225 Difference]: With dead ends: 181 [2020-07-17 14:55:25,679 INFO L226 Difference]: Without dead ends: 175 [2020-07-17 14:55:25,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-07-17 14:55:25,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-17 14:55:25,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2020-07-17 14:55:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-17 14:55:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2020-07-17 14:55:25,687 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 166 [2020-07-17 14:55:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:25,687 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2020-07-17 14:55:25,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-17 14:55:25,688 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2020-07-17 14:55:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-07-17 14:55:25,689 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:25,689 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] [2020-07-17 14:55:25,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-07-17 14:55:25,689 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:25,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1790910679, now seen corresponding path program 31 times [2020-07-17 14:55:25,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:25,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769581774] [2020-07-17 14:55:25,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:27,631 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:27,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769581774] [2020-07-17 14:55:27,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:27,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2020-07-17 14:55:27,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754861120] [2020-07-17 14:55:27,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-07-17 14:55:27,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:27,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-07-17 14:55:27,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2020-07-17 14:55:27,633 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 66 states. [2020-07-17 14:55:30,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:30,839 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2020-07-17 14:55:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-07-17 14:55:30,839 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 171 [2020-07-17 14:55:30,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:30,840 INFO L225 Difference]: With dead ends: 186 [2020-07-17 14:55:30,841 INFO L226 Difference]: Without dead ends: 180 [2020-07-17 14:55:30,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5120, Invalid=11136, Unknown=0, NotChecked=0, Total=16256 [2020-07-17 14:55:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-07-17 14:55:30,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-07-17 14:55:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-17 14:55:30,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2020-07-17 14:55:30,851 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 171 [2020-07-17 14:55:30,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:30,851 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2020-07-17 14:55:30,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-07-17 14:55:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2020-07-17 14:55:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-07-17 14:55:30,853 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:30,853 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] [2020-07-17 14:55:30,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-07-17 14:55:30,853 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:30,855 INFO L82 PathProgramCache]: Analyzing trace with hash 410559609, now seen corresponding path program 32 times [2020-07-17 14:55:30,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:30,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677764506] [2020-07-17 14:55:30,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:33,019 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:33,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677764506] [2020-07-17 14:55:33,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:33,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2020-07-17 14:55:33,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150137143] [2020-07-17 14:55:33,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-17 14:55:33,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:33,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-17 14:55:33,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-07-17 14:55:33,021 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 68 states. [2020-07-17 14:55:36,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:36,550 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2020-07-17 14:55:36,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-07-17 14:55:36,551 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 176 [2020-07-17 14:55:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:36,554 INFO L225 Difference]: With dead ends: 191 [2020-07-17 14:55:36,554 INFO L226 Difference]: Without dead ends: 185 [2020-07-17 14:55:36,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-07-17 14:55:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-07-17 14:55:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-07-17 14:55:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-07-17 14:55:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2020-07-17 14:55:36,562 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 176 [2020-07-17 14:55:36,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:36,562 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2020-07-17 14:55:36,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-17 14:55:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2020-07-17 14:55:36,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-07-17 14:55:36,563 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:36,564 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] [2020-07-17 14:55:36,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-07-17 14:55:36,564 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:36,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:36,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1247144425, now seen corresponding path program 33 times [2020-07-17 14:55:36,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:36,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316155953] [2020-07-17 14:55:36,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:38,842 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:38,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316155953] [2020-07-17 14:55:38,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:38,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2020-07-17 14:55:38,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948550594] [2020-07-17 14:55:38,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-17 14:55:38,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:38,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-17 14:55:38,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2020-07-17 14:55:38,844 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 70 states. [2020-07-17 14:55:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:42,464 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2020-07-17 14:55:42,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-17 14:55:42,465 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 181 [2020-07-17 14:55:42,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:42,467 INFO L225 Difference]: With dead ends: 196 [2020-07-17 14:55:42,467 INFO L226 Difference]: Without dead ends: 190 [2020-07-17 14:55:42,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5780, Invalid=12580, Unknown=0, NotChecked=0, Total=18360 [2020-07-17 14:55:42,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-17 14:55:42,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-07-17 14:55:42,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-07-17 14:55:42,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2020-07-17 14:55:42,474 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 181 [2020-07-17 14:55:42,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:42,475 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2020-07-17 14:55:42,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-17 14:55:42,475 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2020-07-17 14:55:42,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-17 14:55:42,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:42,476 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] [2020-07-17 14:55:42,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-07-17 14:55:42,477 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:42,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:42,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1873479879, now seen corresponding path program 34 times [2020-07-17 14:55:42,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:42,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829030712] [2020-07-17 14:55:42,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:44,840 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:44,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829030712] [2020-07-17 14:55:44,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:44,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2020-07-17 14:55:44,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775368473] [2020-07-17 14:55:44,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-07-17 14:55:44,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:44,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-07-17 14:55:44,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-07-17 14:55:44,843 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 72 states. [2020-07-17 14:55:48,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:48,608 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2020-07-17 14:55:48,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-07-17 14:55:48,615 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 186 [2020-07-17 14:55:48,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:48,616 INFO L225 Difference]: With dead ends: 201 [2020-07-17 14:55:48,616 INFO L226 Difference]: Without dead ends: 195 [2020-07-17 14:55:48,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-07-17 14:55:48,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-07-17 14:55:48,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2020-07-17 14:55:48,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-17 14:55:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2020-07-17 14:55:48,626 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 186 [2020-07-17 14:55:48,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:48,627 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2020-07-17 14:55:48,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-07-17 14:55:48,627 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2020-07-17 14:55:48,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-07-17 14:55:48,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:48,628 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] [2020-07-17 14:55:48,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-07-17 14:55:48,629 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:48,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:48,629 INFO L82 PathProgramCache]: Analyzing trace with hash -61637801, now seen corresponding path program 35 times [2020-07-17 14:55:48,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:48,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2477656] [2020-07-17 14:55:48,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:51,482 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:51,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2477656] [2020-07-17 14:55:51,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:51,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2020-07-17 14:55:51,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645477487] [2020-07-17 14:55:51,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-07-17 14:55:51,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:51,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-07-17 14:55:51,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2020-07-17 14:55:51,484 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 74 states. [2020-07-17 14:55:55,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:55,680 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2020-07-17 14:55:55,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-07-17 14:55:55,681 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 191 [2020-07-17 14:55:55,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:55,683 INFO L225 Difference]: With dead ends: 206 [2020-07-17 14:55:55,683 INFO L226 Difference]: Without dead ends: 200 [2020-07-17 14:55:55,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=6480, Invalid=14112, Unknown=0, NotChecked=0, Total=20592 [2020-07-17 14:55:55,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-07-17 14:55:55,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2020-07-17 14:55:55,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-07-17 14:55:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2020-07-17 14:55:55,689 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 191 [2020-07-17 14:55:55,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:55,689 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2020-07-17 14:55:55,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-07-17 14:55:55,689 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2020-07-17 14:55:55,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-07-17 14:55:55,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:55,690 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] [2020-07-17 14:55:55,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-07-17 14:55:55,690 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:55,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:55,691 INFO L82 PathProgramCache]: Analyzing trace with hash -772220423, now seen corresponding path program 36 times [2020-07-17 14:55:55,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:55,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188482840] [2020-07-17 14:55:55,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:58,518 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:58,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188482840] [2020-07-17 14:55:58,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:58,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2020-07-17 14:55:58,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953736796] [2020-07-17 14:55:58,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-07-17 14:55:58,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:58,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-07-17 14:55:58,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-07-17 14:55:58,521 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 76 states. [2020-07-17 14:56:03,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:56:03,078 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2020-07-17 14:56:03,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-07-17 14:56:03,079 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 196 [2020-07-17 14:56:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:56:03,081 INFO L225 Difference]: With dead ends: 211 [2020-07-17 14:56:03,081 INFO L226 Difference]: Without dead ends: 205 [2020-07-17 14:56:03,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-07-17 14:56:03,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-17 14:56:03,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2020-07-17 14:56:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-07-17 14:56:03,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2020-07-17 14:56:03,089 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 196 [2020-07-17 14:56:03,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:56:03,090 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2020-07-17 14:56:03,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-07-17 14:56:03,090 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2020-07-17 14:56:03,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-17 14:56:03,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:56:03,091 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] [2020-07-17 14:56:03,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-07-17 14:56:03,091 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:56:03,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:56:03,092 INFO L82 PathProgramCache]: Analyzing trace with hash 930042007, now seen corresponding path program 37 times [2020-07-17 14:56:03,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:56:03,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570939226] [2020-07-17 14:56:03,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:56:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:56:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:56:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:56:06,170 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:56:06,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570939226] [2020-07-17 14:56:06,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:56:06,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2020-07-17 14:56:06,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776434648] [2020-07-17 14:56:06,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-07-17 14:56:06,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:56:06,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-07-17 14:56:06,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2020-07-17 14:56:06,172 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 78 states. [2020-07-17 14:56:11,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:56:11,151 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2020-07-17 14:56:11,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-07-17 14:56:11,152 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 201 [2020-07-17 14:56:11,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:56:11,154 INFO L225 Difference]: With dead ends: 216 [2020-07-17 14:56:11,154 INFO L226 Difference]: Without dead ends: 210 [2020-07-17 14:56:11,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=7220, Invalid=15732, Unknown=0, NotChecked=0, Total=22952 [2020-07-17 14:56:11,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-07-17 14:56:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-07-17 14:56:11,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-07-17 14:56:11,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2020-07-17 14:56:11,161 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 201 [2020-07-17 14:56:11,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:56:11,161 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2020-07-17 14:56:11,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-07-17 14:56:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2020-07-17 14:56:11,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-07-17 14:56:11,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:56:11,162 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] [2020-07-17 14:56:11,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-07-17 14:56:11,163 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:56:11,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:56:11,163 INFO L82 PathProgramCache]: Analyzing trace with hash 892357817, now seen corresponding path program 38 times [2020-07-17 14:56:11,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:56:11,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528410397] [2020-07-17 14:56:11,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:56:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:56:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:56:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:56:14,405 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:56:14,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528410397] [2020-07-17 14:56:14,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:56:14,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2020-07-17 14:56:14,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670972438] [2020-07-17 14:56:14,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-07-17 14:56:14,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:56:14,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-07-17 14:56:14,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-07-17 14:56:14,407 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 80 states. [2020-07-17 14:56:19,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:56:19,747 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2020-07-17 14:56:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-07-17 14:56:19,748 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 206 [2020-07-17 14:56:19,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:56:19,750 INFO L225 Difference]: With dead ends: 221 [2020-07-17 14:56:19,750 INFO L226 Difference]: Without dead ends: 215 [2020-07-17 14:56:19,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-07-17 14:56:19,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-17 14:56:19,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-07-17 14:56:19,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-17 14:56:19,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2020-07-17 14:56:19,758 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 206 [2020-07-17 14:56:19,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:56:19,758 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2020-07-17 14:56:19,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-07-17 14:56:19,759 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2020-07-17 14:56:19,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-07-17 14:56:19,760 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:56:19,760 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] [2020-07-17 14:56:19,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-07-17 14:56:19,760 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:56:19,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:56:19,761 INFO L82 PathProgramCache]: Analyzing trace with hash 246519255, now seen corresponding path program 39 times [2020-07-17 14:56:19,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:56:19,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065602016] [2020-07-17 14:56:19,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:56:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:56:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:56:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:56:23,232 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:56:23,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065602016] [2020-07-17 14:56:23,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:56:23,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2020-07-17 14:56:23,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641538122] [2020-07-17 14:56:23,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-07-17 14:56:23,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:56:23,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-07-17 14:56:23,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2020-07-17 14:56:23,234 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 82 states. [2020-07-17 14:56:28,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:56:28,995 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2020-07-17 14:56:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-07-17 14:56:28,996 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 211 [2020-07-17 14:56:28,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:56:28,998 INFO L225 Difference]: With dead ends: 226 [2020-07-17 14:56:28,998 INFO L226 Difference]: Without dead ends: 220 [2020-07-17 14:56:29,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4562 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=8000, Invalid=17440, Unknown=0, NotChecked=0, Total=25440 [2020-07-17 14:56:29,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-07-17 14:56:29,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-07-17 14:56:29,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-07-17 14:56:29,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2020-07-17 14:56:29,010 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 211 [2020-07-17 14:56:29,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:56:29,011 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2020-07-17 14:56:29,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-07-17 14:56:29,011 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2020-07-17 14:56:29,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-07-17 14:56:29,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:56:29,012 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] [2020-07-17 14:56:29,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-07-17 14:56:29,013 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:56:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:56:29,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1027125383, now seen corresponding path program 40 times [2020-07-17 14:56:29,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:56:29,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493722079] [2020-07-17 14:56:29,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:56:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:56:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:56:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:56:32,729 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:56:32,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493722079] [2020-07-17 14:56:32,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:56:32,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2020-07-17 14:56:32,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573073104] [2020-07-17 14:56:32,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-07-17 14:56:32,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:56:32,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-07-17 14:56:32,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-07-17 14:56:32,732 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 84 states. [2020-07-17 14:56:38,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:56:38,598 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2020-07-17 14:56:38,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-07-17 14:56:38,599 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 216 [2020-07-17 14:56:38,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:56:38,601 INFO L225 Difference]: With dead ends: 231 [2020-07-17 14:56:38,601 INFO L226 Difference]: Without dead ends: 225 [2020-07-17 14:56:38,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-07-17 14:56:38,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-07-17 14:56:38,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-07-17 14:56:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-07-17 14:56:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2020-07-17 14:56:38,610 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 216 [2020-07-17 14:56:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:56:38,610 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2020-07-17 14:56:38,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-07-17 14:56:38,611 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2020-07-17 14:56:38,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-07-17 14:56:38,612 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:56:38,612 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] [2020-07-17 14:56:38,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-07-17 14:56:38,613 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:56:38,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:56:38,613 INFO L82 PathProgramCache]: Analyzing trace with hash 416172823, now seen corresponding path program 41 times [2020-07-17 14:56:38,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:56:38,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115154207] [2020-07-17 14:56:38,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:56:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:56:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:56:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:56:42,377 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:56:42,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115154207] [2020-07-17 14:56:42,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:56:42,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2020-07-17 14:56:42,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054245740] [2020-07-17 14:56:42,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-07-17 14:56:42,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:56:42,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-07-17 14:56:42,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2020-07-17 14:56:42,380 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand 86 states. [2020-07-17 14:56:48,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:56:48,782 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2020-07-17 14:56:48,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-07-17 14:56:48,784 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 221 [2020-07-17 14:56:48,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:56:48,786 INFO L225 Difference]: With dead ends: 236 [2020-07-17 14:56:48,786 INFO L226 Difference]: Without dead ends: 230 [2020-07-17 14:56:48,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5042 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=8820, Invalid=19236, Unknown=0, NotChecked=0, Total=28056 [2020-07-17 14:56:48,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-17 14:56:48,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2020-07-17 14:56:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-07-17 14:56:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2020-07-17 14:56:48,794 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 221 [2020-07-17 14:56:48,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:56:48,795 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2020-07-17 14:56:48,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-07-17 14:56:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2020-07-17 14:56:48,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-07-17 14:56:48,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:56:48,796 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] [2020-07-17 14:56:48,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-07-17 14:56:48,797 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:56:48,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:56:48,797 INFO L82 PathProgramCache]: Analyzing trace with hash -192290247, now seen corresponding path program 42 times [2020-07-17 14:56:48,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:56:48,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789658458] [2020-07-17 14:56:48,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:56:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:56:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:56:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:56:53,101 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:56:53,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789658458] [2020-07-17 14:56:53,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:56:53,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2020-07-17 14:56:53,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918910298] [2020-07-17 14:56:53,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-07-17 14:56:53,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:56:53,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-07-17 14:56:53,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-07-17 14:56:53,104 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 88 states. [2020-07-17 14:57:00,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:57:00,107 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2020-07-17 14:57:00,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-07-17 14:57:00,108 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 226 [2020-07-17 14:57:00,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:57:00,110 INFO L225 Difference]: With dead ends: 241 [2020-07-17 14:57:00,110 INFO L226 Difference]: Without dead ends: 235 [2020-07-17 14:57:00,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-07-17 14:57:00,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-07-17 14:57:00,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2020-07-17 14:57:00,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-17 14:57:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2020-07-17 14:57:00,119 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 226 [2020-07-17 14:57:00,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:57:00,120 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2020-07-17 14:57:00,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-07-17 14:57:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2020-07-17 14:57:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-07-17 14:57:00,121 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:57:00,121 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:57:00,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-07-17 14:57:00,122 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:57:00,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:57:00,122 INFO L82 PathProgramCache]: Analyzing trace with hash 460943447, now seen corresponding path program 43 times [2020-07-17 14:57:00,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:57:00,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195624988] [2020-07-17 14:57:00,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:57:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:57:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:57:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:57:04,922 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:57:04,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195624988] [2020-07-17 14:57:04,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:57:04,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2020-07-17 14:57:04,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335344183] [2020-07-17 14:57:04,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-07-17 14:57:04,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:57:04,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-07-17 14:57:04,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2020-07-17 14:57:04,925 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 90 states. [2020-07-17 14:57:12,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:57:12,320 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2020-07-17 14:57:12,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-07-17 14:57:12,320 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 231 [2020-07-17 14:57:12,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:57:12,323 INFO L225 Difference]: With dead ends: 246 [2020-07-17 14:57:12,323 INFO L226 Difference]: Without dead ends: 240 [2020-07-17 14:57:12,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=9680, Invalid=21120, Unknown=0, NotChecked=0, Total=30800 [2020-07-17 14:57:12,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-07-17 14:57:12,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2020-07-17 14:57:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-07-17 14:57:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2020-07-17 14:57:12,333 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 231 [2020-07-17 14:57:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:57:12,333 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2020-07-17 14:57:12,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-07-17 14:57:12,334 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2020-07-17 14:57:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-07-17 14:57:12,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:57:12,335 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:57:12,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-07-17 14:57:12,336 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:57:12,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:57:12,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1967391993, now seen corresponding path program 44 times [2020-07-17 14:57:12,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:57:12,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653076162] [2020-07-17 14:57:12,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:57:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:57:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:57:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:57:17,391 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:57:17,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653076162] [2020-07-17 14:57:17,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:57:17,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2020-07-17 14:57:17,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126707505] [2020-07-17 14:57:17,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-07-17 14:57:17,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:57:17,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-07-17 14:57:17,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-07-17 14:57:17,394 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 92 states. [2020-07-17 14:57:24,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:57:24,875 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2020-07-17 14:57:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-07-17 14:57:24,876 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 236 [2020-07-17 14:57:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:57:24,881 INFO L225 Difference]: With dead ends: 251 [2020-07-17 14:57:24,881 INFO L226 Difference]: Without dead ends: 245 [2020-07-17 14:57:24,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-07-17 14:57:24,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-07-17 14:57:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2020-07-17 14:57:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-07-17 14:57:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2020-07-17 14:57:24,889 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 236 [2020-07-17 14:57:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:57:24,889 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2020-07-17 14:57:24,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-07-17 14:57:24,890 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2020-07-17 14:57:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-17 14:57:24,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:57:24,891 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:57:24,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-07-17 14:57:24,892 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:57:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:57:24,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1265042839, now seen corresponding path program 45 times [2020-07-17 14:57:24,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:57:24,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912044491] [2020-07-17 14:57:24,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:57:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:57:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:57:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:57:30,315 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:57:30,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912044491] [2020-07-17 14:57:30,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:57:30,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2020-07-17 14:57:30,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185732474] [2020-07-17 14:57:30,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-07-17 14:57:30,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:57:30,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-07-17 14:57:30,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2020-07-17 14:57:30,317 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 94 states. [2020-07-17 14:57:38,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:57:38,009 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2020-07-17 14:57:38,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-07-17 14:57:38,010 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 241 [2020-07-17 14:57:38,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:57:38,011 INFO L225 Difference]: With dead ends: 256 [2020-07-17 14:57:38,012 INFO L226 Difference]: Without dead ends: 250 [2020-07-17 14:57:38,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=10580, Invalid=23092, Unknown=0, NotChecked=0, Total=33672 [2020-07-17 14:57:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-17 14:57:38,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2020-07-17 14:57:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-07-17 14:57:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2020-07-17 14:57:38,019 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 241 [2020-07-17 14:57:38,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:57:38,019 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2020-07-17 14:57:38,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-07-17 14:57:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2020-07-17 14:57:38,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-07-17 14:57:38,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:57:38,020 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:57:38,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-07-17 14:57:38,021 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:57:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:57:38,021 INFO L82 PathProgramCache]: Analyzing trace with hash -524175431, now seen corresponding path program 46 times [2020-07-17 14:57:38,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:57:38,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934011336] [2020-07-17 14:57:38,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:57:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:57:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:57:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:57:43,165 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:57:43,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934011336] [2020-07-17 14:57:43,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:57:43,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2020-07-17 14:57:43,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799130886] [2020-07-17 14:57:43,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-17 14:57:43,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:57:43,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-17 14:57:43,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-07-17 14:57:43,168 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 96 states. [2020-07-17 14:57:52,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:57:52,464 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2020-07-17 14:57:52,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2020-07-17 14:57:52,465 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 246 [2020-07-17 14:57:52,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:57:52,467 INFO L225 Difference]: With dead ends: 261 [2020-07-17 14:57:52,467 INFO L226 Difference]: Without dead ends: 255 [2020-07-17 14:57:52,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-07-17 14:57:52,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-17 14:57:52,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2020-07-17 14:57:52,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-07-17 14:57:52,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 252 transitions. [2020-07-17 14:57:52,477 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 252 transitions. Word has length 246 [2020-07-17 14:57:52,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:57:52,477 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 252 transitions. [2020-07-17 14:57:52,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-07-17 14:57:52,478 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 252 transitions. [2020-07-17 14:57:52,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-07-17 14:57:52,479 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:57:52,479 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:57:52,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-07-17 14:57:52,480 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:57:52,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:57:52,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1941239081, now seen corresponding path program 47 times [2020-07-17 14:57:52,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:57:52,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047803892] [2020-07-17 14:57:52,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:57:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:57:58,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:57:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:57:58,439 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:57:58,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047803892] [2020-07-17 14:57:58,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:57:58,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2020-07-17 14:57:58,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406849088] [2020-07-17 14:57:58,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-07-17 14:57:58,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:57:58,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-07-17 14:57:58,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2020-07-17 14:57:58,442 INFO L87 Difference]: Start difference. First operand 252 states and 252 transitions. Second operand 98 states. [2020-07-17 14:58:07,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:58:07,626 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2020-07-17 14:58:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-07-17 14:58:07,627 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 251 [2020-07-17 14:58:07,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:58:07,629 INFO L225 Difference]: With dead ends: 266 [2020-07-17 14:58:07,629 INFO L226 Difference]: Without dead ends: 260 [2020-07-17 14:58:07,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=11520, Invalid=25152, Unknown=0, NotChecked=0, Total=36672 [2020-07-17 14:58:07,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-17 14:58:07,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2020-07-17 14:58:07,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-07-17 14:58:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2020-07-17 14:58:07,639 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 251 [2020-07-17 14:58:07,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:58:07,639 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2020-07-17 14:58:07,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-07-17 14:58:07,639 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2020-07-17 14:58:07,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-07-17 14:58:07,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:58:07,641 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:58:07,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-07-17 14:58:07,641 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:58:07,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:58:07,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2083587463, now seen corresponding path program 48 times [2020-07-17 14:58:07,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:58:07,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344569198] [2020-07-17 14:58:07,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:58:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:58:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:58:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:58:13,480 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:58:13,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344569198] [2020-07-17 14:58:13,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:58:13,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2020-07-17 14:58:13,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149198220] [2020-07-17 14:58:13,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-07-17 14:58:13,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:58:13,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-07-17 14:58:13,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-07-17 14:58:13,481 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 100 states. [2020-07-17 14:58:22,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:58:22,552 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2020-07-17 14:58:22,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-07-17 14:58:22,553 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 256 [2020-07-17 14:58:22,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:58:22,555 INFO L225 Difference]: With dead ends: 271 [2020-07-17 14:58:22,555 INFO L226 Difference]: Without dead ends: 265 [2020-07-17 14:58:22,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-07-17 14:58:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-07-17 14:58:22,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2020-07-17 14:58:22,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-07-17 14:58:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 262 transitions. [2020-07-17 14:58:22,564 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 262 transitions. Word has length 256 [2020-07-17 14:58:22,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:58:22,565 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 262 transitions. [2020-07-17 14:58:22,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-07-17 14:58:22,565 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 262 transitions. [2020-07-17 14:58:22,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-07-17 14:58:22,566 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:58:22,567 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:58:22,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-07-17 14:58:22,567 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:58:22,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:58:22,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1327923177, now seen corresponding path program 49 times [2020-07-17 14:58:22,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:58:22,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640318265] [2020-07-17 14:58:22,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:58:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:58:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:58:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:58:29,297 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:58:29,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640318265] [2020-07-17 14:58:29,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:58:29,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2020-07-17 14:58:29,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810814901] [2020-07-17 14:58:29,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-07-17 14:58:29,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:58:29,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-07-17 14:58:29,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2020-07-17 14:58:29,299 INFO L87 Difference]: Start difference. First operand 262 states and 262 transitions. Second operand 102 states. [2020-07-17 14:58:39,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:58:39,112 INFO L93 Difference]: Finished difference Result 276 states and 276 transitions. [2020-07-17 14:58:39,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-07-17 14:58:39,113 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 261 [2020-07-17 14:58:39,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:58:39,115 INFO L225 Difference]: With dead ends: 276 [2020-07-17 14:58:39,115 INFO L226 Difference]: Without dead ends: 270 [2020-07-17 14:58:39,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=12500, Invalid=27300, Unknown=0, NotChecked=0, Total=39800 [2020-07-17 14:58:39,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-07-17 14:58:39,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 267. [2020-07-17 14:58:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-07-17 14:58:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2020-07-17 14:58:39,126 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 261 [2020-07-17 14:58:39,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:58:39,127 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2020-07-17 14:58:39,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-07-17 14:58:39,127 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2020-07-17 14:58:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-07-17 14:58:39,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:58:39,128 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:58:39,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-07-17 14:58:39,129 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:58:39,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:58:39,129 INFO L82 PathProgramCache]: Analyzing trace with hash 473419065, now seen corresponding path program 50 times [2020-07-17 14:58:39,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:58:39,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233762630] [2020-07-17 14:58:39,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:58:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:58:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:58:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:58:45,757 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:58:45,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233762630] [2020-07-17 14:58:45,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:58:45,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2020-07-17 14:58:45,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703924526] [2020-07-17 14:58:45,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-07-17 14:58:45,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:58:45,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-07-17 14:58:45,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-07-17 14:58:45,760 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 104 states. [2020-07-17 14:58:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:58:56,576 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2020-07-17 14:58:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2020-07-17 14:58:56,577 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 266 [2020-07-17 14:58:56,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:58:56,579 INFO L225 Difference]: With dead ends: 281 [2020-07-17 14:58:56,579 INFO L226 Difference]: Without dead ends: 275 [2020-07-17 14:58:56,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-07-17 14:58:56,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-07-17 14:58:56,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 272. [2020-07-17 14:58:56,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-07-17 14:58:56,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 272 transitions. [2020-07-17 14:58:56,588 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 272 transitions. Word has length 266 [2020-07-17 14:58:56,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:58:56,589 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 272 transitions. [2020-07-17 14:58:56,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-07-17 14:58:56,589 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 272 transitions. [2020-07-17 14:58:56,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-07-17 14:58:56,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:58:56,591 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:58:56,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-07-17 14:58:56,591 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:58:56,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:58:56,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1161403049, now seen corresponding path program 51 times [2020-07-17 14:58:56,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:58:56,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134542250] [2020-07-17 14:58:56,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:58:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:59:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:59:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:59:03,886 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:59:03,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134542250] [2020-07-17 14:59:03,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:59:03,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2020-07-17 14:59:03,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586729787] [2020-07-17 14:59:03,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-07-17 14:59:03,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:59:03,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-07-17 14:59:03,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2020-07-17 14:59:03,888 INFO L87 Difference]: Start difference. First operand 272 states and 272 transitions. Second operand 106 states. [2020-07-17 14:59:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:59:15,106 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2020-07-17 14:59:15,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-07-17 14:59:15,107 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 271 [2020-07-17 14:59:15,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:59:15,110 INFO L225 Difference]: With dead ends: 286 [2020-07-17 14:59:15,110 INFO L226 Difference]: Without dead ends: 280 [2020-07-17 14:59:15,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=13520, Invalid=29536, Unknown=0, NotChecked=0, Total=43056 [2020-07-17 14:59:15,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-07-17 14:59:15,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 277. [2020-07-17 14:59:15,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-07-17 14:59:15,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2020-07-17 14:59:15,118 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 271 [2020-07-17 14:59:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:59:15,119 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2020-07-17 14:59:15,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-07-17 14:59:15,119 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2020-07-17 14:59:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-07-17 14:59:15,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:59:15,121 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:59:15,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-07-17 14:59:15,121 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:59:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:59:15,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1731710983, now seen corresponding path program 52 times [2020-07-17 14:59:15,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:59:15,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116088656] [2020-07-17 14:59:15,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:59:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:59:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:59:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:59:23,152 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:59:23,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116088656] [2020-07-17 14:59:23,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:59:23,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2020-07-17 14:59:23,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784926148] [2020-07-17 14:59:23,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-07-17 14:59:23,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:59:23,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-07-17 14:59:23,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2020-07-17 14:59:23,155 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 108 states. [2020-07-17 14:59:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:59:35,452 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2020-07-17 14:59:35,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2020-07-17 14:59:35,453 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 276 [2020-07-17 14:59:35,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:59:35,455 INFO L225 Difference]: With dead ends: 291 [2020-07-17 14:59:35,455 INFO L226 Difference]: Without dead ends: 285 [2020-07-17 14:59:35,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=14045, Invalid=30687, Unknown=0, NotChecked=0, Total=44732 [2020-07-17 14:59:35,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-17 14:59:35,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 282. [2020-07-17 14:59:35,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-07-17 14:59:35,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 282 transitions. [2020-07-17 14:59:35,462 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 282 transitions. Word has length 276 [2020-07-17 14:59:35,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:59:35,462 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 282 transitions. [2020-07-17 14:59:35,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-07-17 14:59:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 282 transitions. [2020-07-17 14:59:35,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-07-17 14:59:35,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:59:35,464 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:59:35,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-07-17 14:59:35,464 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:59:35,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:59:35,465 INFO L82 PathProgramCache]: Analyzing trace with hash 449165975, now seen corresponding path program 53 times [2020-07-17 14:59:35,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:59:35,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990368890] [2020-07-17 14:59:35,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:59:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:59:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:59:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:59:44,380 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:59:44,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990368890] [2020-07-17 14:59:44,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:59:44,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2020-07-17 14:59:44,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125898454] [2020-07-17 14:59:44,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-07-17 14:59:44,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:59:44,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-07-17 14:59:44,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2020-07-17 14:59:44,383 INFO L87 Difference]: Start difference. First operand 282 states and 282 transitions. Second operand 110 states. [2020-07-17 14:59:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:59:58,278 INFO L93 Difference]: Finished difference Result 296 states and 296 transitions. [2020-07-17 14:59:58,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-07-17 14:59:58,280 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 281 [2020-07-17 14:59:58,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:59:58,281 INFO L225 Difference]: With dead ends: 296 [2020-07-17 14:59:58,281 INFO L226 Difference]: Without dead ends: 290 [2020-07-17 14:59:58,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8426 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=14580, Invalid=31860, Unknown=0, NotChecked=0, Total=46440 [2020-07-17 14:59:58,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-07-17 14:59:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 287. [2020-07-17 14:59:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-07-17 14:59:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2020-07-17 14:59:58,290 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 281 [2020-07-17 14:59:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:59:58,290 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2020-07-17 14:59:58,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-07-17 14:59:58,291 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2020-07-17 14:59:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-17 14:59:58,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:59:58,292 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:59:58,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-07-17 14:59:58,293 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:59:58,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:59:58,293 INFO L82 PathProgramCache]: Analyzing trace with hash -649321799, now seen corresponding path program 54 times [2020-07-17 14:59:58,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:59:58,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682242093] [2020-07-17 14:59:58,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:59:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:00:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:00:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 15:00:08,125 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 15:00:08,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682242093] [2020-07-17 15:00:08,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 15:00:08,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2020-07-17 15:00:08,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307282133] [2020-07-17 15:00:08,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-07-17 15:00:08,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 15:00:08,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-07-17 15:00:08,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2020-07-17 15:00:08,127 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 112 states. [2020-07-17 15:00:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 15:00:23,573 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2020-07-17 15:00:23,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-07-17 15:00:23,574 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 286 [2020-07-17 15:00:23,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 15:00:23,576 INFO L225 Difference]: With dead ends: 301 [2020-07-17 15:00:23,576 INFO L226 Difference]: Without dead ends: 295 [2020-07-17 15:00:23,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8747 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=15125, Invalid=33055, Unknown=0, NotChecked=0, Total=48180 [2020-07-17 15:00:23,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-07-17 15:00:23,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 292. [2020-07-17 15:00:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-07-17 15:00:23,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2020-07-17 15:00:23,585 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 286 [2020-07-17 15:00:23,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 15:00:23,586 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2020-07-17 15:00:23,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-07-17 15:00:23,586 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2020-07-17 15:00:23,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-07-17 15:00:23,587 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 15:00:23,588 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 15:00:23,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-07-17 15:00:23,588 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 15:00:23,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 15:00:23,588 INFO L82 PathProgramCache]: Analyzing trace with hash -259293225, now seen corresponding path program 55 times [2020-07-17 15:00:23,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 15:00:23,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88543522] [2020-07-17 15:00:23,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 15:00:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:00:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:00:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 15:00:34,059 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 15:00:34,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88543522] [2020-07-17 15:00:34,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 15:00:34,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2020-07-17 15:00:34,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460077150] [2020-07-17 15:00:34,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-07-17 15:00:34,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 15:00:34,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-07-17 15:00:34,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2020-07-17 15:00:34,062 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 114 states. [2020-07-17 15:00:51,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 15:00:51,692 INFO L93 Difference]: Finished difference Result 306 states and 306 transitions. [2020-07-17 15:00:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-07-17 15:00:51,694 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 291 [2020-07-17 15:00:51,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 15:00:51,696 INFO L225 Difference]: With dead ends: 306 [2020-07-17 15:00:51,696 INFO L226 Difference]: Without dead ends: 300 [2020-07-17 15:00:51,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9074 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=15680, Invalid=34272, Unknown=0, NotChecked=0, Total=49952 [2020-07-17 15:00:51,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-07-17 15:00:51,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 297. [2020-07-17 15:00:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-07-17 15:00:51,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 297 transitions. [2020-07-17 15:00:51,705 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 297 transitions. Word has length 291 [2020-07-17 15:00:51,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 15:00:51,705 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 297 transitions. [2020-07-17 15:00:51,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-07-17 15:00:51,706 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 297 transitions. [2020-07-17 15:00:51,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-07-17 15:00:51,707 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 15:00:51,707 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 15:00:51,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-07-17 15:00:51,708 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 15:00:51,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 15:00:51,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1854907769, now seen corresponding path program 56 times [2020-07-17 15:00:51,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 15:00:51,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426408903] [2020-07-17 15:00:51,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 15:00:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:01:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:01:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 15:01:03,958 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 15:01:03,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426408903] [2020-07-17 15:01:03,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 15:01:03,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2020-07-17 15:01:03,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438676913] [2020-07-17 15:01:03,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-07-17 15:01:03,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 15:01:03,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-07-17 15:01:03,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2020-07-17 15:01:03,961 INFO L87 Difference]: Start difference. First operand 297 states and 297 transitions. Second operand 116 states. [2020-07-17 15:01:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 15:01:22,828 INFO L93 Difference]: Finished difference Result 311 states and 311 transitions. [2020-07-17 15:01:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-07-17 15:01:22,830 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 296 [2020-07-17 15:01:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 15:01:22,832 INFO L225 Difference]: With dead ends: 311 [2020-07-17 15:01:22,832 INFO L226 Difference]: Without dead ends: 305 [2020-07-17 15:01:22,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=16245, Invalid=35511, Unknown=0, NotChecked=0, Total=51756 [2020-07-17 15:01:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-07-17 15:01:22,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 302. [2020-07-17 15:01:22,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-07-17 15:01:22,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 302 transitions. [2020-07-17 15:01:22,839 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 302 transitions. Word has length 296 [2020-07-17 15:01:22,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 15:01:22,840 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 302 transitions. [2020-07-17 15:01:22,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-07-17 15:01:22,840 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 302 transitions. [2020-07-17 15:01:22,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-07-17 15:01:22,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 15:01:22,842 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 15:01:22,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-07-17 15:01:22,842 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 15:01:22,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 15:01:22,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1254864151, now seen corresponding path program 57 times [2020-07-17 15:01:22,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 15:01:22,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965889762] [2020-07-17 15:01:22,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 15:01:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:01:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:01:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 15:01:36,057 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 15:01:36,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965889762] [2020-07-17 15:01:36,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 15:01:36,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2020-07-17 15:01:36,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43206317] [2020-07-17 15:01:36,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-07-17 15:01:36,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 15:01:36,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-07-17 15:01:36,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2020-07-17 15:01:36,060 INFO L87 Difference]: Start difference. First operand 302 states and 302 transitions. Second operand 118 states. [2020-07-17 15:01:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 15:01:56,897 INFO L93 Difference]: Finished difference Result 316 states and 316 transitions. [2020-07-17 15:01:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2020-07-17 15:01:56,899 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 301 [2020-07-17 15:01:56,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 15:01:56,901 INFO L225 Difference]: With dead ends: 316 [2020-07-17 15:01:56,901 INFO L226 Difference]: Without dead ends: 310 [2020-07-17 15:01:56,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9746 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=16820, Invalid=36772, Unknown=0, NotChecked=0, Total=53592 [2020-07-17 15:01:56,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-07-17 15:01:56,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 307. [2020-07-17 15:01:56,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-07-17 15:01:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2020-07-17 15:01:56,908 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 301 [2020-07-17 15:01:56,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 15:01:56,908 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2020-07-17 15:01:56,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-07-17 15:01:56,909 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2020-07-17 15:01:56,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-07-17 15:01:56,910 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 15:01:56,910 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 15:01:56,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-07-17 15:01:56,911 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 15:01:56,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 15:01:56,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1516156985, now seen corresponding path program 58 times [2020-07-17 15:01:56,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 15:01:56,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781205084] [2020-07-17 15:01:56,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 15:01:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:02:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:02:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 15:02:11,265 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 15:02:11,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781205084] [2020-07-17 15:02:11,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 15:02:11,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2020-07-17 15:02:11,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718897011] [2020-07-17 15:02:11,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-07-17 15:02:11,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 15:02:11,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-07-17 15:02:11,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2020-07-17 15:02:11,268 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 120 states. [2020-07-17 15:02:33,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 15:02:33,813 INFO L93 Difference]: Finished difference Result 321 states and 321 transitions. [2020-07-17 15:02:33,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-07-17 15:02:33,817 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 306 [2020-07-17 15:02:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 15:02:33,819 INFO L225 Difference]: With dead ends: 321 [2020-07-17 15:02:33,819 INFO L226 Difference]: Without dead ends: 315 [2020-07-17 15:02:33,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=17405, Invalid=38055, Unknown=0, NotChecked=0, Total=55460 [2020-07-17 15:02:33,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-07-17 15:02:33,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 312. [2020-07-17 15:02:33,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-07-17 15:02:33,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 312 transitions. [2020-07-17 15:02:33,828 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 312 transitions. Word has length 306 [2020-07-17 15:02:33,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 15:02:33,829 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 312 transitions. [2020-07-17 15:02:33,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-07-17 15:02:33,829 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 312 transitions. [2020-07-17 15:02:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-07-17 15:02:33,830 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 15:02:33,831 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 15:02:33,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-07-17 15:02:33,831 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 15:02:33,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 15:02:33,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1731877463, now seen corresponding path program 59 times [2020-07-17 15:02:33,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 15:02:33,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882764395] [2020-07-17 15:02:33,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 15:02:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:02:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:02:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 15:02:49,572 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 15:02:49,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882764395] [2020-07-17 15:02:49,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 15:02:49,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2020-07-17 15:02:49,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510853490] [2020-07-17 15:02:49,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2020-07-17 15:02:49,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 15:02:49,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2020-07-17 15:02:49,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3722, Invalid=11040, Unknown=0, NotChecked=0, Total=14762 [2020-07-17 15:02:49,574 INFO L87 Difference]: Start difference. First operand 312 states and 312 transitions. Second operand 122 states. [2020-07-17 15:03:14,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 15:03:14,628 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2020-07-17 15:03:14,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2020-07-17 15:03:14,631 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 311 [2020-07-17 15:03:14,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 15:03:14,633 INFO L225 Difference]: With dead ends: 326 [2020-07-17 15:03:14,633 INFO L226 Difference]: Without dead ends: 320 [2020-07-17 15:03:14,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10442 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=18000, Invalid=39360, Unknown=0, NotChecked=0, Total=57360 [2020-07-17 15:03:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-07-17 15:03:14,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 317. [2020-07-17 15:03:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-07-17 15:03:14,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2020-07-17 15:03:14,641 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 311 [2020-07-17 15:03:14,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 15:03:14,641 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2020-07-17 15:03:14,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 122 states. [2020-07-17 15:03:14,641 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2020-07-17 15:03:14,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-07-17 15:03:14,642 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 15:03:14,643 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 15:03:14,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-07-17 15:03:14,643 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 15:03:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 15:03:14,643 INFO L82 PathProgramCache]: Analyzing trace with hash -813344007, now seen corresponding path program 60 times [2020-07-17 15:03:14,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 15:03:14,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044556497] [2020-07-17 15:03:14,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 15:03:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:03:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:03:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 15:03:32,205 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 15:03:32,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044556497] [2020-07-17 15:03:32,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 15:03:32,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2020-07-17 15:03:32,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551906595] [2020-07-17 15:03:32,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2020-07-17 15:03:32,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 15:03:32,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2020-07-17 15:03:32,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3845, Invalid=11407, Unknown=0, NotChecked=0, Total=15252 [2020-07-17 15:03:32,207 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand 124 states. [2020-07-17 15:04:00,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 15:04:00,296 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2020-07-17 15:04:00,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2020-07-17 15:04:00,300 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 316 [2020-07-17 15:04:00,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 15:04:00,303 INFO L225 Difference]: With dead ends: 331 [2020-07-17 15:04:00,303 INFO L226 Difference]: Without dead ends: 325 [2020-07-17 15:04:00,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10799 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=18605, Invalid=40687, Unknown=0, NotChecked=0, Total=59292 [2020-07-17 15:04:00,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-07-17 15:04:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 322. [2020-07-17 15:04:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-07-17 15:04:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 322 transitions. [2020-07-17 15:04:00,312 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 322 transitions. Word has length 316 [2020-07-17 15:04:00,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 15:04:00,312 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 322 transitions. [2020-07-17 15:04:00,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 124 states. [2020-07-17 15:04:00,312 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 322 transitions. [2020-07-17 15:04:00,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-07-17 15:04:00,313 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 15:04:00,314 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 15:04:00,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-07-17 15:04:00,314 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 15:04:00,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 15:04:00,314 INFO L82 PathProgramCache]: Analyzing trace with hash -225742953, now seen corresponding path program 61 times [2020-07-17 15:04:00,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 15:04:00,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803851029] [2020-07-17 15:04:00,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 15:04:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:04:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:04:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 15:04:20,178 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 15:04:20,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803851029] [2020-07-17 15:04:20,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 15:04:20,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2020-07-17 15:04:20,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232399601] [2020-07-17 15:04:20,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2020-07-17 15:04:20,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 15:04:20,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2020-07-17 15:04:20,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3970, Invalid=11780, Unknown=0, NotChecked=0, Total=15750 [2020-07-17 15:04:20,181 INFO L87 Difference]: Start difference. First operand 322 states and 322 transitions. Second operand 126 states. [2020-07-17 15:04:51,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 15:04:51,416 INFO L93 Difference]: Finished difference Result 336 states and 336 transitions. [2020-07-17 15:04:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2020-07-17 15:04:51,421 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 321 [2020-07-17 15:04:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 15:04:51,423 INFO L225 Difference]: With dead ends: 336 [2020-07-17 15:04:51,423 INFO L226 Difference]: Without dead ends: 330 [2020-07-17 15:04:51,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11162 ImplicationChecksByTransitivity, 48.0s TimeCoverageRelationStatistics Valid=19220, Invalid=42036, Unknown=0, NotChecked=0, Total=61256 [2020-07-17 15:04:51,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-07-17 15:04:51,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 327. [2020-07-17 15:04:51,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-07-17 15:04:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2020-07-17 15:04:51,431 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 321 [2020-07-17 15:04:51,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 15:04:51,432 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2020-07-17 15:04:51,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 126 states. [2020-07-17 15:04:51,432 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2020-07-17 15:04:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-17 15:04:51,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 15:04:51,434 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 15:04:51,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-07-17 15:04:51,434 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 15:04:51,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 15:04:51,435 INFO L82 PathProgramCache]: Analyzing trace with hash -238056007, now seen corresponding path program 62 times [2020-07-17 15:04:51,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 15:04:51,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673609607] [2020-07-17 15:04:51,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 15:04:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:05:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:05:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 15:05:12,999 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 15:05:12,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673609607] [2020-07-17 15:05:12,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 15:05:13,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2020-07-17 15:05:13,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656773981] [2020-07-17 15:05:13,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2020-07-17 15:05:13,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 15:05:13,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2020-07-17 15:05:13,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=12159, Unknown=0, NotChecked=0, Total=16256 [2020-07-17 15:05:13,002 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand 128 states. [2020-07-17 15:05:44,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 15:05:44,490 INFO L93 Difference]: Finished difference Result 341 states and 341 transitions. [2020-07-17 15:05:44,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2020-07-17 15:05:44,494 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 326 [2020-07-17 15:05:44,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 15:05:44,497 INFO L225 Difference]: With dead ends: 341 [2020-07-17 15:05:44,497 INFO L226 Difference]: Without dead ends: 335 [2020-07-17 15:05:44,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11531 ImplicationChecksByTransitivity, 50.9s TimeCoverageRelationStatistics Valid=19845, Invalid=43407, Unknown=0, NotChecked=0, Total=63252 [2020-07-17 15:05:44,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-07-17 15:05:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 332. [2020-07-17 15:05:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-07-17 15:05:44,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 332 transitions. [2020-07-17 15:05:44,507 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 332 transitions. Word has length 326 [2020-07-17 15:05:44,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 15:05:44,508 INFO L479 AbstractCegarLoop]: Abstraction has 332 states and 332 transitions. [2020-07-17 15:05:44,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 128 states. [2020-07-17 15:05:44,508 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 332 transitions. [2020-07-17 15:05:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-17 15:05:44,510 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 15:05:44,511 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 15:05:44,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-07-17 15:05:44,511 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 15:05:44,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 15:05:44,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1215493335, now seen corresponding path program 63 times [2020-07-17 15:05:44,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 15:05:44,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777004714] [2020-07-17 15:05:44,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 15:05:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:06:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:06:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 15:06:07,436 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 15:06:07,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777004714] [2020-07-17 15:06:07,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 15:06:07,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2020-07-17 15:06:07,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413376279] [2020-07-17 15:06:07,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2020-07-17 15:06:07,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 15:06:07,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2020-07-17 15:06:07,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4226, Invalid=12544, Unknown=0, NotChecked=0, Total=16770 [2020-07-17 15:06:07,439 INFO L87 Difference]: Start difference. First operand 332 states and 332 transitions. Second operand 130 states. [2020-07-17 15:06:43,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 15:06:43,924 INFO L93 Difference]: Finished difference Result 346 states and 346 transitions. [2020-07-17 15:06:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2020-07-17 15:06:43,929 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 331 [2020-07-17 15:06:43,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 15:06:43,931 INFO L225 Difference]: With dead ends: 346 [2020-07-17 15:06:43,931 INFO L226 Difference]: Without dead ends: 340 [2020-07-17 15:06:43,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11906 ImplicationChecksByTransitivity, 55.8s TimeCoverageRelationStatistics Valid=20480, Invalid=44800, Unknown=0, NotChecked=0, Total=65280 [2020-07-17 15:06:43,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-07-17 15:06:43,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 337. [2020-07-17 15:06:43,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-07-17 15:06:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 337 transitions. [2020-07-17 15:06:43,942 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 337 transitions. Word has length 331 [2020-07-17 15:06:43,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 15:06:43,943 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 337 transitions. [2020-07-17 15:06:43,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 130 states. [2020-07-17 15:06:43,943 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 337 transitions. [2020-07-17 15:06:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-17 15:06:43,945 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 15:06:43,945 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 15:06:43,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-07-17 15:06:43,946 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 15:06:43,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 15:06:43,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1777774471, now seen corresponding path program 64 times [2020-07-17 15:06:43,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 15:06:43,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74560588] [2020-07-17 15:06:43,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 15:06:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:07:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 15:07:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 15:07:09,639 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 15:07:09,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74560588] [2020-07-17 15:07:09,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 15:07:09,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2020-07-17 15:07:09,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488726995] [2020-07-17 15:07:09,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-07-17 15:07:09,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 15:07:09,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-07-17 15:07:09,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4357, Invalid=12935, Unknown=0, NotChecked=0, Total=17292 [2020-07-17 15:07:09,643 INFO L87 Difference]: Start difference. First operand 337 states and 337 transitions. Second operand 132 states.