/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 05:12:04,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 05:12:04,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 05:12:04,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 05:12:04,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 05:12:04,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 05:12:04,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 05:12:04,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 05:12:04,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 05:12:04,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 05:12:04,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 05:12:04,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 05:12:04,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 05:12:04,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 05:12:04,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 05:12:04,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 05:12:04,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 05:12:04,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 05:12:04,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 05:12:04,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 05:12:04,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 05:12:04,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 05:12:04,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 05:12:04,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 05:12:04,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 05:12:04,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 05:12:04,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 05:12:04,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 05:12:04,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 05:12:04,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 05:12:04,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 05:12:04,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 05:12:04,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 05:12:04,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 05:12:04,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 05:12:04,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 05:12:04,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 05:12:04,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 05:12:04,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 05:12:04,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 05:12:04,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 05:12:04,259 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 05:12:04,302 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 05:12:04,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 05:12:04,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 05:12:04,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 05:12:04,305 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 05:12:04,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 05:12:04,305 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 05:12:04,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 05:12:04,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 05:12:04,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 05:12:04,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 05:12:04,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 05:12:04,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 05:12:04,308 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 05:12:04,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 05:12:04,309 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 05:12:04,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 05:12:04,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 05:12:04,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 05:12:04,309 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 05:12:04,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 05:12:04,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:12:04,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 05:12:04,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 05:12:04,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 05:12:04,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 05:12:04,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 05:12:04,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 05:12:04,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 05:12:04,311 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; [2020-08-19 05:12:04,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 05:12:04,659 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 05:12:04,663 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 05:12:04,664 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 05:12:04,665 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 05:12:04,666 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-19 05:12:04,724 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efe9deb1a/c0bc16be79a34e2d80c4847149880700/FLAG2ad9221ff [2020-08-19 05:12:05,246 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 05:12:05,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-19 05:12:05,259 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efe9deb1a/c0bc16be79a34e2d80c4847149880700/FLAG2ad9221ff [2020-08-19 05:12:05,558 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efe9deb1a/c0bc16be79a34e2d80c4847149880700 [2020-08-19 05:12:05,569 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 05:12:05,571 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 05:12:05,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 05:12:05,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 05:12:05,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 05:12:05,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:12:05" (1/1) ... [2020-08-19 05:12:05,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da42254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:05, skipping insertion in model container [2020-08-19 05:12:05,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:12:05" (1/1) ... [2020-08-19 05:12:05,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 05:12:05,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 05:12:05,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:12:05,804 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 05:12:05,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:12:05,844 INFO L208 MainTranslator]: Completed translation [2020-08-19 05:12:05,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:05 WrapperNode [2020-08-19 05:12:05,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 05:12:05,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 05:12:05,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 05:12:05,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 05:12:05,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:05" (1/1) ... [2020-08-19 05:12:05,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:05" (1/1) ... [2020-08-19 05:12:05,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:05" (1/1) ... [2020-08-19 05:12:05,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:05" (1/1) ... [2020-08-19 05:12:05,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:05" (1/1) ... [2020-08-19 05:12:05,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:05" (1/1) ... [2020-08-19 05:12:05,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:05" (1/1) ... [2020-08-19 05:12:05,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 05:12:05,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 05:12:05,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 05:12:05,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 05:12:05,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-19 05:12:06,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 05:12:06,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 05:12:06,030 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 05:12:06,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 05:12:06,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 05:12:06,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 05:12:06,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 05:12:06,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 05:12:06,389 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 05:12:06,389 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 05:12:06,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:12:06 BoogieIcfgContainer [2020-08-19 05:12:06,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 05:12:06,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 05:12:06,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 05:12:06,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 05:12:06,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 05:12:05" (1/3) ... [2020-08-19 05:12:06,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0cc78f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:12:06, skipping insertion in model container [2020-08-19 05:12:06,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:05" (2/3) ... [2020-08-19 05:12:06,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0cc78f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:12:06, skipping insertion in model container [2020-08-19 05:12:06,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:12:06" (3/3) ... [2020-08-19 05:12:06,408 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-19 05:12:06,432 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 05:12:06,439 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 05:12:06,449 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 05:12:06,473 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 05:12:06,474 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 05:12:06,474 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 05:12:06,474 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 05:12:06,474 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 05:12:06,474 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 05:12:06,474 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 05:12:06,475 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 05:12:06,493 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-19 05:12:06,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 05:12:06,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:06,500 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] [2020-08-19 05:12:06,501 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:06,507 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-19 05:12:06,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:06,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778039243] [2020-08-19 05:12:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:06,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:06,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778039243] [2020-08-19 05:12:06,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:06,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:06,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257655902] [2020-08-19 05:12:06,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:06,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:06,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:06,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:06,752 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-19 05:12:06,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:06,813 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-19 05:12:06,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:06,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 05:12:06,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:06,826 INFO L225 Difference]: With dead ends: 93 [2020-08-19 05:12:06,827 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 05:12:06,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:06,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 05:12:06,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-19 05:12:06,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 05:12:06,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-19 05:12:06,879 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-19 05:12:06,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:06,880 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-19 05:12:06,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:06,880 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-19 05:12:06,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 05:12:06,882 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:06,882 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] [2020-08-19 05:12:06,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 05:12:06,883 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:06,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:06,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-19 05:12:06,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:06,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717103087] [2020-08-19 05:12:06,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:07,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717103087] [2020-08-19 05:12:07,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:07,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:07,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611644080] [2020-08-19 05:12:07,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:07,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:07,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:07,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,025 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-19 05:12:07,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:07,089 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-19 05:12:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:07,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 05:12:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:07,094 INFO L225 Difference]: With dead ends: 127 [2020-08-19 05:12:07,095 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 05:12:07,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 05:12:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-19 05:12:07,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-19 05:12:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-19 05:12:07,113 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-19 05:12:07,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:07,113 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-19 05:12:07,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:07,114 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-19 05:12:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 05:12:07,115 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:07,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:07,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 05:12:07,116 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:07,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:07,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-19 05:12:07,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:07,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101162093] [2020-08-19 05:12:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:07,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101162093] [2020-08-19 05:12:07,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:07,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:07,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535314835] [2020-08-19 05:12:07,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:07,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:07,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:07,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,175 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-19 05:12:07,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:07,198 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-19 05:12:07,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:07,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 05:12:07,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:07,200 INFO L225 Difference]: With dead ends: 117 [2020-08-19 05:12:07,200 INFO L226 Difference]: Without dead ends: 81 [2020-08-19 05:12:07,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-19 05:12:07,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-19 05:12:07,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 05:12:07,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-19 05:12:07,215 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-19 05:12:07,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:07,215 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-19 05:12:07,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:07,219 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-19 05:12:07,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 05:12:07,220 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:07,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:07,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 05:12:07,221 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:07,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:07,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-19 05:12:07,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:07,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929307801] [2020-08-19 05:12:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:07,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929307801] [2020-08-19 05:12:07,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:07,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:07,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227637888] [2020-08-19 05:12:07,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:07,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:07,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:07,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,310 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-19 05:12:07,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:07,333 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-19 05:12:07,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:07,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 05:12:07,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:07,335 INFO L225 Difference]: With dead ends: 148 [2020-08-19 05:12:07,336 INFO L226 Difference]: Without dead ends: 146 [2020-08-19 05:12:07,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-19 05:12:07,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-19 05:12:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-19 05:12:07,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-19 05:12:07,349 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-19 05:12:07,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:07,350 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-19 05:12:07,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:07,350 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-19 05:12:07,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 05:12:07,351 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:07,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:07,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 05:12:07,352 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:07,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:07,353 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-19 05:12:07,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:07,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617263445] [2020-08-19 05:12:07,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:07,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617263445] [2020-08-19 05:12:07,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:07,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:07,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413042200] [2020-08-19 05:12:07,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:07,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:07,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:07,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,398 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-19 05:12:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:07,421 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-19 05:12:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:07,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 05:12:07,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:07,424 INFO L225 Difference]: With dead ends: 244 [2020-08-19 05:12:07,424 INFO L226 Difference]: Without dead ends: 148 [2020-08-19 05:12:07,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-19 05:12:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-19 05:12:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-19 05:12:07,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-19 05:12:07,440 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-19 05:12:07,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:07,440 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-19 05:12:07,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:07,441 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-19 05:12:07,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 05:12:07,442 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:07,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:07,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 05:12:07,443 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:07,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:07,443 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-19 05:12:07,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:07,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405881759] [2020-08-19 05:12:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:07,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405881759] [2020-08-19 05:12:07,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:07,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:07,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079508157] [2020-08-19 05:12:07,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:07,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:07,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:07,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,543 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-19 05:12:07,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:07,563 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-19 05:12:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:07,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 05:12:07,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:07,565 INFO L225 Difference]: With dead ends: 219 [2020-08-19 05:12:07,565 INFO L226 Difference]: Without dead ends: 150 [2020-08-19 05:12:07,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-19 05:12:07,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-19 05:12:07,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-19 05:12:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-19 05:12:07,578 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-19 05:12:07,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:07,579 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-19 05:12:07,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-19 05:12:07,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 05:12:07,580 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:07,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:07,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 05:12:07,581 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:07,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:07,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-19 05:12:07,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:07,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745936954] [2020-08-19 05:12:07,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:07,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:07,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745936954] [2020-08-19 05:12:07,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:07,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:07,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023993934] [2020-08-19 05:12:07,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:07,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:07,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:07,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,617 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-19 05:12:07,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:07,636 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-19 05:12:07,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:07,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 05:12:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:07,639 INFO L225 Difference]: With dead ends: 276 [2020-08-19 05:12:07,640 INFO L226 Difference]: Without dead ends: 274 [2020-08-19 05:12:07,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-19 05:12:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-19 05:12:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-19 05:12:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-19 05:12:07,653 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-19 05:12:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:07,654 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-19 05:12:07,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:07,654 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-19 05:12:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 05:12:07,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:07,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:07,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 05:12:07,657 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:07,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:07,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-19 05:12:07,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:07,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291073649] [2020-08-19 05:12:07,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:07,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291073649] [2020-08-19 05:12:07,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:07,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:07,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687521090] [2020-08-19 05:12:07,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:07,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:07,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:07,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,699 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-19 05:12:07,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:07,721 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-19 05:12:07,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:07,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 05:12:07,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:07,724 INFO L225 Difference]: With dead ends: 472 [2020-08-19 05:12:07,724 INFO L226 Difference]: Without dead ends: 282 [2020-08-19 05:12:07,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-19 05:12:07,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-19 05:12:07,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-19 05:12:07,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-19 05:12:07,742 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-19 05:12:07,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:07,742 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-19 05:12:07,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:07,742 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-19 05:12:07,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 05:12:07,747 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:07,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:07,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 05:12:07,751 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:07,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:07,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-19 05:12:07,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:07,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68065195] [2020-08-19 05:12:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:07,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68065195] [2020-08-19 05:12:07,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:07,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:07,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651622335] [2020-08-19 05:12:07,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:07,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:07,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:07,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,809 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-19 05:12:07,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:07,832 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-19 05:12:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:07,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 05:12:07,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:07,835 INFO L225 Difference]: With dead ends: 420 [2020-08-19 05:12:07,835 INFO L226 Difference]: Without dead ends: 286 [2020-08-19 05:12:07,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-19 05:12:07,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-19 05:12:07,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-19 05:12:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-19 05:12:07,849 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-19 05:12:07,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:07,849 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-19 05:12:07,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:07,849 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-19 05:12:07,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 05:12:07,851 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:07,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:07,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 05:12:07,852 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:07,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:07,852 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-19 05:12:07,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:07,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850985509] [2020-08-19 05:12:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:07,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850985509] [2020-08-19 05:12:07,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:07,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:07,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869264610] [2020-08-19 05:12:07,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:07,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:07,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:07,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,883 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-19 05:12:07,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:07,905 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-19 05:12:07,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:07,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 05:12:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:07,909 INFO L225 Difference]: With dead ends: 524 [2020-08-19 05:12:07,909 INFO L226 Difference]: Without dead ends: 522 [2020-08-19 05:12:07,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-19 05:12:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-19 05:12:07,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-19 05:12:07,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-19 05:12:07,925 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-19 05:12:07,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:07,925 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-19 05:12:07,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:07,926 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-19 05:12:07,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 05:12:07,927 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:07,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:07,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 05:12:07,928 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:07,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:07,929 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-19 05:12:07,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:07,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795615221] [2020-08-19 05:12:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:07,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795615221] [2020-08-19 05:12:07,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:07,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:07,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961494532] [2020-08-19 05:12:07,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:07,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:07,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:07,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,960 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-19 05:12:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:07,987 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-19 05:12:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:07,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 05:12:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:07,991 INFO L225 Difference]: With dead ends: 924 [2020-08-19 05:12:07,992 INFO L226 Difference]: Without dead ends: 546 [2020-08-19 05:12:07,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-19 05:12:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-19 05:12:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-19 05:12:08,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-19 05:12:08,014 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-19 05:12:08,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:08,015 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-19 05:12:08,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:08,015 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-19 05:12:08,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 05:12:08,017 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:08,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:08,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 05:12:08,018 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:08,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:08,018 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-19 05:12:08,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:08,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28259865] [2020-08-19 05:12:08,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:08,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28259865] [2020-08-19 05:12:08,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:08,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:08,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644419153] [2020-08-19 05:12:08,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:08,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:08,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:08,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:08,046 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-19 05:12:08,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:08,068 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-19 05:12:08,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:08,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 05:12:08,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:08,072 INFO L225 Difference]: With dead ends: 816 [2020-08-19 05:12:08,073 INFO L226 Difference]: Without dead ends: 554 [2020-08-19 05:12:08,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:08,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-19 05:12:08,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-19 05:12:08,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-19 05:12:08,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-19 05:12:08,093 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-19 05:12:08,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:08,093 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-19 05:12:08,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-19 05:12:08,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 05:12:08,095 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:08,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:08,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 05:12:08,096 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:08,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:08,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-19 05:12:08,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:08,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904460866] [2020-08-19 05:12:08,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:08,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904460866] [2020-08-19 05:12:08,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:08,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:08,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690032893] [2020-08-19 05:12:08,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:08,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:08,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:08,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:08,126 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-19 05:12:08,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:08,159 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-19 05:12:08,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:08,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 05:12:08,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:08,168 INFO L225 Difference]: With dead ends: 1004 [2020-08-19 05:12:08,168 INFO L226 Difference]: Without dead ends: 1002 [2020-08-19 05:12:08,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-19 05:12:08,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-19 05:12:08,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-19 05:12:08,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-19 05:12:08,202 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-19 05:12:08,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:08,203 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-19 05:12:08,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:08,203 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-19 05:12:08,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 05:12:08,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:08,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:08,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 05:12:08,206 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:08,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:08,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-19 05:12:08,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:08,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603100207] [2020-08-19 05:12:08,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:08,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603100207] [2020-08-19 05:12:08,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:08,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:08,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717818067] [2020-08-19 05:12:08,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:08,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:08,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:08,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:08,236 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-19 05:12:08,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:08,292 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-19 05:12:08,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:08,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 05:12:08,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:08,298 INFO L225 Difference]: With dead ends: 1820 [2020-08-19 05:12:08,299 INFO L226 Difference]: Without dead ends: 1066 [2020-08-19 05:12:08,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:08,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-19 05:12:08,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-19 05:12:08,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-19 05:12:08,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-19 05:12:08,334 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-19 05:12:08,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:08,334 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-19 05:12:08,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:08,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-19 05:12:08,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 05:12:08,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:08,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:08,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 05:12:08,337 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:08,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:08,337 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-19 05:12:08,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:08,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884369135] [2020-08-19 05:12:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:08,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884369135] [2020-08-19 05:12:08,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:08,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:08,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870779575] [2020-08-19 05:12:08,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:08,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:08,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:08,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:08,367 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-19 05:12:08,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:08,399 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-19 05:12:08,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:08,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 05:12:08,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:08,406 INFO L225 Difference]: With dead ends: 1596 [2020-08-19 05:12:08,407 INFO L226 Difference]: Without dead ends: 1082 [2020-08-19 05:12:08,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:08,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-19 05:12:08,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-19 05:12:08,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-19 05:12:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-19 05:12:08,444 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-19 05:12:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:08,444 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-19 05:12:08,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:08,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-19 05:12:08,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 05:12:08,446 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:08,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:08,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 05:12:08,447 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:08,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:08,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-19 05:12:08,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:08,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706630901] [2020-08-19 05:12:08,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:08,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706630901] [2020-08-19 05:12:08,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:08,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:08,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879852530] [2020-08-19 05:12:08,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:08,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:08,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:08,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:08,474 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-19 05:12:08,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:08,510 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-19 05:12:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:08,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 05:12:08,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:08,525 INFO L225 Difference]: With dead ends: 1932 [2020-08-19 05:12:08,525 INFO L226 Difference]: Without dead ends: 1930 [2020-08-19 05:12:08,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:08,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-19 05:12:08,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-19 05:12:08,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-19 05:12:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-19 05:12:08,594 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-19 05:12:08,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:08,595 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-19 05:12:08,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:08,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-19 05:12:08,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 05:12:08,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:08,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:08,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 05:12:08,603 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:08,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-19 05:12:08,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:08,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140946656] [2020-08-19 05:12:08,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:08,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140946656] [2020-08-19 05:12:08,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:08,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:08,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792418770] [2020-08-19 05:12:08,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:08,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:08,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:08,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:08,634 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-19 05:12:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:08,707 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-19 05:12:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:08,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 05:12:08,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:08,719 INFO L225 Difference]: With dead ends: 3596 [2020-08-19 05:12:08,719 INFO L226 Difference]: Without dead ends: 2090 [2020-08-19 05:12:08,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:08,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-19 05:12:08,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-19 05:12:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-19 05:12:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-19 05:12:08,818 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-19 05:12:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:08,818 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-19 05:12:08,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:08,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-19 05:12:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 05:12:08,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:08,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:08,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 05:12:08,824 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:08,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:08,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-19 05:12:08,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:08,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182607314] [2020-08-19 05:12:08,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:08,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182607314] [2020-08-19 05:12:08,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:08,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:08,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320602314] [2020-08-19 05:12:08,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:08,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:08,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:08,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:08,854 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-19 05:12:08,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:08,947 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-19 05:12:08,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:08,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 05:12:08,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:08,960 INFO L225 Difference]: With dead ends: 3132 [2020-08-19 05:12:08,960 INFO L226 Difference]: Without dead ends: 2122 [2020-08-19 05:12:08,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:08,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-19 05:12:09,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-19 05:12:09,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-19 05:12:09,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-19 05:12:09,035 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-19 05:12:09,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:09,035 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-19 05:12:09,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:09,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-19 05:12:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 05:12:09,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:09,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:09,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 05:12:09,039 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:09,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-19 05:12:09,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:09,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939557441] [2020-08-19 05:12:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:09,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939557441] [2020-08-19 05:12:09,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:09,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:09,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512139955] [2020-08-19 05:12:09,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:09,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:09,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:09,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:09,062 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-19 05:12:09,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:09,129 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-19 05:12:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:09,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 05:12:09,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:09,149 INFO L225 Difference]: With dead ends: 3724 [2020-08-19 05:12:09,149 INFO L226 Difference]: Without dead ends: 3722 [2020-08-19 05:12:09,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:09,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-19 05:12:09,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-19 05:12:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-19 05:12:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-19 05:12:09,246 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-19 05:12:09,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:09,246 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-19 05:12:09,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:09,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-19 05:12:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 05:12:09,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:09,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:09,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 05:12:09,252 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:09,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:09,253 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-19 05:12:09,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:09,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835232942] [2020-08-19 05:12:09,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:09,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835232942] [2020-08-19 05:12:09,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:09,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:09,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668574100] [2020-08-19 05:12:09,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:09,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:09,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:09,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:09,277 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-19 05:12:09,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:09,351 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-19 05:12:09,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:09,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 05:12:09,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:09,369 INFO L225 Difference]: With dead ends: 7116 [2020-08-19 05:12:09,369 INFO L226 Difference]: Without dead ends: 4106 [2020-08-19 05:12:09,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:09,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-19 05:12:09,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-19 05:12:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-19 05:12:09,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-19 05:12:09,526 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-19 05:12:09,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:09,527 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-19 05:12:09,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:09,527 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-19 05:12:09,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 05:12:09,533 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:09,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:09,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 05:12:09,534 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:09,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:09,534 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-19 05:12:09,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:09,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705509145] [2020-08-19 05:12:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:09,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705509145] [2020-08-19 05:12:09,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:09,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:09,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178095124] [2020-08-19 05:12:09,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:09,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:09,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:09,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:09,560 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-19 05:12:09,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:09,625 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-19 05:12:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:09,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 05:12:09,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:09,644 INFO L225 Difference]: With dead ends: 6156 [2020-08-19 05:12:09,645 INFO L226 Difference]: Without dead ends: 4170 [2020-08-19 05:12:09,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:09,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-19 05:12:09,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-19 05:12:09,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-19 05:12:09,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-19 05:12:09,761 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-19 05:12:09,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:09,762 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-19 05:12:09,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:09,762 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-19 05:12:09,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 05:12:09,768 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:09,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:09,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 05:12:09,768 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:09,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:09,769 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-19 05:12:09,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:09,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622607554] [2020-08-19 05:12:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:09,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622607554] [2020-08-19 05:12:09,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:09,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:09,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471314540] [2020-08-19 05:12:09,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:09,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:09,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:09,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:09,790 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-19 05:12:09,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:09,916 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-19 05:12:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:09,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 05:12:09,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:09,939 INFO L225 Difference]: With dead ends: 12108 [2020-08-19 05:12:09,940 INFO L226 Difference]: Without dead ends: 8074 [2020-08-19 05:12:09,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:09,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-19 05:12:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-19 05:12:10,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-19 05:12:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-19 05:12:10,276 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-19 05:12:10,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:10,277 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-19 05:12:10,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:10,277 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-19 05:12:10,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 05:12:10,288 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:10,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:10,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 05:12:10,289 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:10,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:10,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-19 05:12:10,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:10,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472208993] [2020-08-19 05:12:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:10,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472208993] [2020-08-19 05:12:10,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:10,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:10,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015187291] [2020-08-19 05:12:10,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:10,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:10,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:10,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:10,334 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-19 05:12:10,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:10,475 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-19 05:12:10,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:10,476 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 05:12:10,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:10,495 INFO L225 Difference]: With dead ends: 9100 [2020-08-19 05:12:10,496 INFO L226 Difference]: Without dead ends: 9098 [2020-08-19 05:12:10,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:10,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-19 05:12:10,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-19 05:12:10,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-19 05:12:10,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-19 05:12:10,739 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-19 05:12:10,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:10,740 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-19 05:12:10,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:10,740 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-19 05:12:10,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 05:12:10,753 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:10,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:10,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 05:12:10,753 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:10,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:10,754 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-19 05:12:10,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:10,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943071312] [2020-08-19 05:12:10,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:10,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943071312] [2020-08-19 05:12:10,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:10,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:10,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225866989] [2020-08-19 05:12:10,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:10,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:10,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:10,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:10,795 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-19 05:12:10,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:10,948 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-19 05:12:10,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:10,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 05:12:10,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:10,976 INFO L225 Difference]: With dead ends: 13708 [2020-08-19 05:12:10,976 INFO L226 Difference]: Without dead ends: 13706 [2020-08-19 05:12:10,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:10,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-19 05:12:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-19 05:12:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-19 05:12:11,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-19 05:12:11,349 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-19 05:12:11,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:11,349 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-19 05:12:11,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-19 05:12:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 05:12:11,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:11,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:11,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 05:12:11,369 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:11,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:11,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-19 05:12:11,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:11,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526195990] [2020-08-19 05:12:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:11,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526195990] [2020-08-19 05:12:11,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:11,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:11,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217184479] [2020-08-19 05:12:11,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:11,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:11,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:11,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:11,403 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-19 05:12:11,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:11,585 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-19 05:12:11,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:11,586 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 05:12:11,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:11,615 INFO L225 Difference]: With dead ends: 27788 [2020-08-19 05:12:11,615 INFO L226 Difference]: Without dead ends: 15754 [2020-08-19 05:12:11,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:11,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-19 05:12:12,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-19 05:12:12,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-19 05:12:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-19 05:12:12,080 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-19 05:12:12,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:12,080 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-19 05:12:12,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:12,081 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-19 05:12:12,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 05:12:12,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:12,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:12,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 05:12:12,102 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:12,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:12,102 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-19 05:12:12,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:12,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874951748] [2020-08-19 05:12:12,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:12,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:12,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874951748] [2020-08-19 05:12:12,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:12,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:12,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187966069] [2020-08-19 05:12:12,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:12,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:12,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:12,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:12,123 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-19 05:12:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:12,291 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-19 05:12:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:12,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 05:12:12,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:12,322 INFO L225 Difference]: With dead ends: 23820 [2020-08-19 05:12:12,323 INFO L226 Difference]: Without dead ends: 16138 [2020-08-19 05:12:12,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-19 05:12:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-19 05:12:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-19 05:12:13,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-19 05:12:13,228 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-19 05:12:13,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:13,228 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-19 05:12:13,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:13,228 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-19 05:12:13,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 05:12:13,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:13,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:13,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 05:12:13,248 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:13,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:13,248 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-19 05:12:13,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:13,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769368191] [2020-08-19 05:12:13,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:13,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:13,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769368191] [2020-08-19 05:12:13,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:13,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:13,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793855862] [2020-08-19 05:12:13,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:13,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:13,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:13,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:13,276 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-19 05:12:13,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:13,542 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-19 05:12:13,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:13,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 05:12:13,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:13,597 INFO L225 Difference]: With dead ends: 26636 [2020-08-19 05:12:13,597 INFO L226 Difference]: Without dead ends: 26634 [2020-08-19 05:12:13,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-19 05:12:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-19 05:12:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-19 05:12:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-19 05:12:14,095 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-19 05:12:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:14,096 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-19 05:12:14,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-19 05:12:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 05:12:14,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:14,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:14,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 05:12:14,145 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:14,146 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-19 05:12:14,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:14,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033299813] [2020-08-19 05:12:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:14,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033299813] [2020-08-19 05:12:14,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:14,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:14,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876487954] [2020-08-19 05:12:14,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:14,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:14,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:14,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,173 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-19 05:12:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:14,516 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-19 05:12:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:14,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 05:12:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:14,581 INFO L225 Difference]: With dead ends: 55308 [2020-08-19 05:12:14,581 INFO L226 Difference]: Without dead ends: 31242 [2020-08-19 05:12:14,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:14,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-19 05:12:15,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-19 05:12:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-19 05:12:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-19 05:12:15,372 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-19 05:12:15,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:15,373 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-19 05:12:15,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-19 05:12:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 05:12:15,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:15,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:15,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 05:12:15,401 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:15,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:15,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-19 05:12:15,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:15,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362210333] [2020-08-19 05:12:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:15,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:15,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362210333] [2020-08-19 05:12:15,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:15,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:15,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084880229] [2020-08-19 05:12:15,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:15,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:15,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:15,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:15,436 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-19 05:12:16,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:16,048 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-19 05:12:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:16,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 05:12:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:16,109 INFO L225 Difference]: With dead ends: 46860 [2020-08-19 05:12:16,110 INFO L226 Difference]: Without dead ends: 31754 [2020-08-19 05:12:16,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:16,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-19 05:12:16,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-19 05:12:16,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-19 05:12:16,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-19 05:12:16,662 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-19 05:12:16,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:16,662 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-19 05:12:16,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:16,663 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-19 05:12:16,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 05:12:16,682 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:16,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:16,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 05:12:16,682 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:16,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:16,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-19 05:12:16,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:16,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556637976] [2020-08-19 05:12:16,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:16,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:16,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556637976] [2020-08-19 05:12:16,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:16,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:16,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439818962] [2020-08-19 05:12:16,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:16,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:16,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:16,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:16,709 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-19 05:12:17,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:17,826 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-19 05:12:17,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:17,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 05:12:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:17,883 INFO L225 Difference]: With dead ends: 51210 [2020-08-19 05:12:17,883 INFO L226 Difference]: Without dead ends: 51208 [2020-08-19 05:12:17,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:17,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-19 05:12:18,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-19 05:12:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-19 05:12:18,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-19 05:12:18,705 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-19 05:12:18,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:18,705 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-19 05:12:18,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-19 05:12:18,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 05:12:18,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:18,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:18,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 05:12:18,738 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:18,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:18,738 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-19 05:12:18,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:18,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798105400] [2020-08-19 05:12:18,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:18,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:18,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798105400] [2020-08-19 05:12:18,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:18,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:18,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836679586] [2020-08-19 05:12:18,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:18,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:18,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:18,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:18,764 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-19 05:12:19,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:19,500 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-19 05:12:19,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:19,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 05:12:19,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:19,501 INFO L225 Difference]: With dead ends: 109576 [2020-08-19 05:12:19,502 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 05:12:19,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:19,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 05:12:19,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 05:12:19,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 05:12:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 05:12:19,605 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-19 05:12:19,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:19,605 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 05:12:19,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:19,605 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 05:12:19,605 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 05:12:19,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 05:12:19,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 05:12:19,639 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 05:12:19,640 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 05:12:19,640 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 05:12:19,640 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 05:12:19,640 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 05:12:19,640 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 05:12:19,640 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-19 05:12:19,640 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-19 05:12:19,641 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-19 05:12:19,641 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-19 05:12:19,641 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-19 05:12:19,641 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-19 05:12:19,641 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,641 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,642 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,644 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,644 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-19 05:12:19,644 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,644 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-19 05:12:19,644 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,644 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,645 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-19 05:12:19,645 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,645 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-19 05:12:19,645 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,645 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,645 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-19 05:12:19,646 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-19 05:12:19,646 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-19 05:12:19,646 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-19 05:12:19,646 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,646 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,646 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-19 05:12:19,646 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-19 05:12:19,646 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-19 05:12:19,647 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,647 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,647 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,647 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,647 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,647 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,647 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,647 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-19 05:12:19,648 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-19 05:12:19,648 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,648 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 05:12:19,648 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-19 05:12:19,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 05:12:19 BoogieIcfgContainer [2020-08-19 05:12:19,669 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 05:12:19,671 INFO L168 Benchmark]: Toolchain (without parser) took 14100.28 ms. Allocated memory was 142.6 MB in the beginning and 1.1 GB in the end (delta: 932.7 MB). Free memory was 104.0 MB in the beginning and 474.0 MB in the end (delta: -369.9 MB). Peak memory consumption was 562.8 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:19,678 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 142.6 MB. Free memory was 122.8 MB in the beginning and 122.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-19 05:12:19,678 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.88 ms. Allocated memory is still 142.6 MB. Free memory was 103.8 MB in the beginning and 92.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:19,679 INFO L168 Benchmark]: Boogie Preprocessor took 120.71 ms. Allocated memory was 142.6 MB in the beginning and 204.5 MB in the end (delta: 61.9 MB). Free memory was 92.9 MB in the beginning and 182.1 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:19,679 INFO L168 Benchmark]: RCFGBuilder took 429.09 ms. Allocated memory is still 204.5 MB. Free memory was 182.1 MB in the beginning and 161.6 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:19,680 INFO L168 Benchmark]: TraceAbstraction took 13269.81 ms. Allocated memory was 204.5 MB in the beginning and 1.1 GB in the end (delta: 870.8 MB). Free memory was 161.0 MB in the beginning and 474.0 MB in the end (delta: -313.0 MB). Peak memory consumption was 557.9 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:19,686 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 142.6 MB. Free memory was 122.8 MB in the beginning and 122.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 272.88 ms. Allocated memory is still 142.6 MB. Free memory was 103.8 MB in the beginning and 92.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.71 ms. Allocated memory was 142.6 MB in the beginning and 204.5 MB in the end (delta: 61.9 MB). Free memory was 92.9 MB in the beginning and 182.1 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 429.09 ms. Allocated memory is still 204.5 MB. Free memory was 182.1 MB in the beginning and 161.6 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13269.81 ms. Allocated memory was 204.5 MB in the beginning and 1.1 GB in the end (delta: 870.8 MB). Free memory was 161.0 MB in the beginning and 474.0 MB in the end (delta: -313.0 MB). Peak memory consumption was 557.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.1s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.7s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...