/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 19:45:52,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:45:52,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:45:52,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:45:52,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:45:52,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:45:52,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:45:52,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:45:52,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:45:52,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:45:52,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:45:52,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:45:52,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:45:52,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:45:52,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:45:52,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:45:52,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:45:52,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:45:52,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:45:52,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:45:52,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:45:52,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:45:52,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:45:52,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:45:52,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 19:45:52,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 19:45:52,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 19:45:52,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 19:45:52,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 19:45:52,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 19:45:52,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 19:45:52,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 19:45:52,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 19:45:52,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 19:45:52,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 19:45:52,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 19:45:52,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 19:45:52,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 19:45:52,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:45:52,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:45:52,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:45:52,239 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 [2020-08-21 19:45:52,261 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:45:52,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:45:52,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:45:52,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:45:52,262 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:45:52,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:45:52,263 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:45:52,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:45:52,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:45:52,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:45:52,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:45:52,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:45:52,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:45:52,264 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:45:52,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:45:52,265 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:45:52,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:45:52,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:45:52,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:45:52,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:45:52,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:45:52,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:45:52,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:45:52,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:45:52,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:45:52,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:45:52,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:45:52,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:45:52,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:45:52,267 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=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:45:52,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:45:52,579 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:45:52,583 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:45:52,584 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:45:52,585 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:45:52,585 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-21 19:45:52,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1554cc91/c1e304913f9d440ca2495869eff1ff1b/FLAG9e6f03e8b [2020-08-21 19:45:53,066 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:45:53,066 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-21 19:45:53,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1554cc91/c1e304913f9d440ca2495869eff1ff1b/FLAG9e6f03e8b [2020-08-21 19:45:53,413 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1554cc91/c1e304913f9d440ca2495869eff1ff1b [2020-08-21 19:45:53,421 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:45:53,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:45:53,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:45:53,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:45:53,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:45:53,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:45:53" (1/1) ... [2020-08-21 19:45:53,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9798512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:53, skipping insertion in model container [2020-08-21 19:45:53,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:45:53" (1/1) ... [2020-08-21 19:45:53,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:45:53,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:45:53,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:45:53,669 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:45:53,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:45:53,740 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:45:53,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:53 WrapperNode [2020-08-21 19:45:53,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:45:53,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:45:53,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:45:53,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:45:53,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:53" (1/1) ... [2020-08-21 19:45:53,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:53" (1/1) ... [2020-08-21 19:45:53,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:53" (1/1) ... [2020-08-21 19:45:53,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:53" (1/1) ... [2020-08-21 19:45:53,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:53" (1/1) ... [2020-08-21 19:45:53,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:53" (1/1) ... [2020-08-21 19:45:53,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:53" (1/1) ... [2020-08-21 19:45:53,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:45:53,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:45:53,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:45:53,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:45:53,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:53" (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 [2020-08-21 19:45:53,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:45:53,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:45:53,925 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:45:53,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:45:53,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 19:45:53,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:45:53,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:45:53,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:45:54,224 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:45:54,225 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 19:45:54,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:45:54 BoogieIcfgContainer [2020-08-21 19:45:54,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:45:54,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:45:54,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:45:54,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:45:54,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:45:53" (1/3) ... [2020-08-21 19:45:54,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b68a04d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:45:54, skipping insertion in model container [2020-08-21 19:45:54,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:53" (2/3) ... [2020-08-21 19:45:54,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b68a04d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:45:54, skipping insertion in model container [2020-08-21 19:45:54,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:45:54" (3/3) ... [2020-08-21 19:45:54,241 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-21 19:45:54,256 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:45:54,265 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:45:54,281 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:45:54,311 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:45:54,311 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:45:54,311 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:45:54,312 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:45:54,312 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:45:54,312 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:45:54,312 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:45:54,312 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:45:54,351 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-21 19:45:54,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 19:45:54,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:54,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:54,359 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:54,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:54,366 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-21 19:45:54,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:54,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542320457] [2020-08-21 19:45:54,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:54,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542320457] [2020-08-21 19:45:54,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:54,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:54,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568769544] [2020-08-21 19:45:54,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:54,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:54,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:54,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:54,651 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-21 19:45:54,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:54,733 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-21 19:45:54,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:54,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 19:45:54,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:54,747 INFO L225 Difference]: With dead ends: 81 [2020-08-21 19:45:54,748 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 19:45:54,751 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 [2020-08-21 19:45:54,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 19:45:54,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-21 19:45:54,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 19:45:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-21 19:45:54,797 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-21 19:45:54,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:54,798 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-21 19:45:54,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:54,799 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-21 19:45:54,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 19:45:54,800 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:54,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:54,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:45:54,801 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:54,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:54,802 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-21 19:45:54,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:54,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359411135] [2020-08-21 19:45:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:54,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359411135] [2020-08-21 19:45:54,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:54,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:54,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527507960] [2020-08-21 19:45:54,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:54,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:54,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:54,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:54,877 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-21 19:45:54,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:54,924 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-21 19:45:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:54,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 19:45:54,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:54,927 INFO L225 Difference]: With dead ends: 107 [2020-08-21 19:45:54,927 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 19:45:54,928 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 [2020-08-21 19:45:54,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 19:45:54,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-21 19:45:54,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 19:45:54,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-21 19:45:54,942 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-21 19:45:54,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:54,943 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-21 19:45:54,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:54,943 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-21 19:45:54,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 19:45:54,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:54,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:54,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:45:54,945 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:54,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:54,946 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-21 19:45:54,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:54,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285704662] [2020-08-21 19:45:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:54,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285704662] [2020-08-21 19:45:54,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:54,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:54,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629796202] [2020-08-21 19:45:54,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:54,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:54,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:54,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:54,998 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-21 19:45:55,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,028 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-21 19:45:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,029 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 19:45:55,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,030 INFO L225 Difference]: With dead ends: 99 [2020-08-21 19:45:55,030 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 19:45:55,031 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 [2020-08-21 19:45:55,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 19:45:55,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-21 19:45:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-21 19:45:55,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-21 19:45:55,051 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-21 19:45:55,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,052 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-21 19:45:55,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,052 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-21 19:45:55,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 19:45:55,053 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:55,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:45:55,054 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,055 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-21 19:45:55,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644257819] [2020-08-21 19:45:55,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:55,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644257819] [2020-08-21 19:45:55,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712171845] [2020-08-21 19:45:55,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,132 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-21 19:45:55,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,154 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-21 19:45:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 19:45:55,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,156 INFO L225 Difference]: With dead ends: 124 [2020-08-21 19:45:55,156 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 19:45:55,157 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 [2020-08-21 19:45:55,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 19:45:55,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-21 19:45:55,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 19:45:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-21 19:45:55,166 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-21 19:45:55,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,167 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-21 19:45:55,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-21 19:45:55,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 19:45:55,168 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:55,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:45:55,169 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,169 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-21 19:45:55,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69592857] [2020-08-21 19:45:55,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:55,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69592857] [2020-08-21 19:45:55,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371005607] [2020-08-21 19:45:55,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,242 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-21 19:45:55,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,283 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-21 19:45:55,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 19:45:55,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,286 INFO L225 Difference]: With dead ends: 204 [2020-08-21 19:45:55,286 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 19:45:55,287 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 [2020-08-21 19:45:55,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 19:45:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-21 19:45:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-21 19:45:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-21 19:45:55,300 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-21 19:45:55,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,301 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-21 19:45:55,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,301 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-21 19:45:55,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 19:45:55,303 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,303 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] [2020-08-21 19:45:55,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 19:45:55,303 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-21 19:45:55,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251266998] [2020-08-21 19:45:55,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:55,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251266998] [2020-08-21 19:45:55,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005150776] [2020-08-21 19:45:55,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,344 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-21 19:45:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,366 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-21 19:45:55,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 19:45:55,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,368 INFO L225 Difference]: With dead ends: 183 [2020-08-21 19:45:55,368 INFO L226 Difference]: Without dead ends: 126 [2020-08-21 19:45:55,369 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 [2020-08-21 19:45:55,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-21 19:45:55,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-21 19:45:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-21 19:45:55,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-21 19:45:55,380 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-21 19:45:55,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,381 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-21 19:45:55,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,381 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-21 19:45:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 19:45:55,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,383 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] [2020-08-21 19:45:55,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 19:45:55,383 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-21 19:45:55,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132615343] [2020-08-21 19:45:55,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:55,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132615343] [2020-08-21 19:45:55,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729142926] [2020-08-21 19:45:55,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,418 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-21 19:45:55,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,453 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-21 19:45:55,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 19:45:55,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,455 INFO L225 Difference]: With dead ends: 228 [2020-08-21 19:45:55,456 INFO L226 Difference]: Without dead ends: 226 [2020-08-21 19:45:55,456 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 [2020-08-21 19:45:55,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-21 19:45:55,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-21 19:45:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 19:45:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-21 19:45:55,478 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-21 19:45:55,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,479 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-21 19:45:55,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,479 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-21 19:45:55,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 19:45:55,481 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,481 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] [2020-08-21 19:45:55,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 19:45:55,481 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-21 19:45:55,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919620156] [2020-08-21 19:45:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:55,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919620156] [2020-08-21 19:45:55,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032063983] [2020-08-21 19:45:55,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,516 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-21 19:45:55,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,535 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-21 19:45:55,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 19:45:55,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,538 INFO L225 Difference]: With dead ends: 392 [2020-08-21 19:45:55,538 INFO L226 Difference]: Without dead ends: 234 [2020-08-21 19:45:55,539 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 [2020-08-21 19:45:55,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-21 19:45:55,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-21 19:45:55,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-21 19:45:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-21 19:45:55,554 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-21 19:45:55,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,554 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-21 19:45:55,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-21 19:45:55,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 19:45:55,557 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,557 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] [2020-08-21 19:45:55,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 19:45:55,558 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-21 19:45:55,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837921601] [2020-08-21 19:45:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:55,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837921601] [2020-08-21 19:45:55,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314197729] [2020-08-21 19:45:55,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,589 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-21 19:45:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,612 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-21 19:45:55,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 19:45:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,614 INFO L225 Difference]: With dead ends: 348 [2020-08-21 19:45:55,614 INFO L226 Difference]: Without dead ends: 238 [2020-08-21 19:45:55,615 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 [2020-08-21 19:45:55,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-21 19:45:55,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-21 19:45:55,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-21 19:45:55,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-21 19:45:55,626 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-21 19:45:55,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,627 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-21 19:45:55,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,627 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-21 19:45:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 19:45:55,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,629 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] [2020-08-21 19:45:55,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 19:45:55,630 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,630 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-21 19:45:55,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104970867] [2020-08-21 19:45:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:55,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104970867] [2020-08-21 19:45:55,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956983444] [2020-08-21 19:45:55,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,666 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-21 19:45:55,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,689 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-21 19:45:55,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 19:45:55,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,693 INFO L225 Difference]: With dead ends: 428 [2020-08-21 19:45:55,693 INFO L226 Difference]: Without dead ends: 426 [2020-08-21 19:45:55,694 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 [2020-08-21 19:45:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-21 19:45:55,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-21 19:45:55,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-21 19:45:55,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-21 19:45:55,706 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-21 19:45:55,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,707 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-21 19:45:55,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,707 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-21 19:45:55,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 19:45:55,709 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,709 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] [2020-08-21 19:45:55,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 19:45:55,710 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,710 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-21 19:45:55,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682148238] [2020-08-21 19:45:55,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:55,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682148238] [2020-08-21 19:45:55,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157657899] [2020-08-21 19:45:55,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,735 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-21 19:45:55,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,758 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-21 19:45:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 19:45:55,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,761 INFO L225 Difference]: With dead ends: 764 [2020-08-21 19:45:55,762 INFO L226 Difference]: Without dead ends: 450 [2020-08-21 19:45:55,763 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 [2020-08-21 19:45:55,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-21 19:45:55,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-21 19:45:55,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-21 19:45:55,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-21 19:45:55,781 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-21 19:45:55,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,781 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-21 19:45:55,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,782 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-21 19:45:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 19:45:55,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:55,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 19:45:55,784 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-21 19:45:55,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140235053] [2020-08-21 19:45:55,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:55,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140235053] [2020-08-21 19:45:55,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316042744] [2020-08-21 19:45:55,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,820 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-21 19:45:55,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,847 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-21 19:45:55,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 19:45:55,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,850 INFO L225 Difference]: With dead ends: 672 [2020-08-21 19:45:55,851 INFO L226 Difference]: Without dead ends: 458 [2020-08-21 19:45:55,852 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 [2020-08-21 19:45:55,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-21 19:45:55,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-21 19:45:55,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-21 19:45:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-21 19:45:55,868 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-21 19:45:55,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,868 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-21 19:45:55,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,868 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-21 19:45:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 19:45:55,869 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,869 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] [2020-08-21 19:45:55,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 19:45:55,870 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,870 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-21 19:45:55,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458968782] [2020-08-21 19:45:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:55,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458968782] [2020-08-21 19:45:55,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164314687] [2020-08-21 19:45:55,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,894 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-21 19:45:55,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,917 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-21 19:45:55,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 19:45:55,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,921 INFO L225 Difference]: With dead ends: 812 [2020-08-21 19:45:55,922 INFO L226 Difference]: Without dead ends: 810 [2020-08-21 19:45:55,922 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 [2020-08-21 19:45:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-21 19:45:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-21 19:45:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-21 19:45:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-21 19:45:55,942 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-21 19:45:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,942 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-21 19:45:55,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-21 19:45:55,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 19:45:55,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,944 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] [2020-08-21 19:45:55,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 19:45:55,945 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-21 19:45:55,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048461185] [2020-08-21 19:45:55,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:55,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048461185] [2020-08-21 19:45:55,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421148555] [2020-08-21 19:45:55,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,972 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-21 19:45:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:56,001 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-21 19:45:56,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:56,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 19:45:56,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:56,006 INFO L225 Difference]: With dead ends: 1500 [2020-08-21 19:45:56,007 INFO L226 Difference]: Without dead ends: 874 [2020-08-21 19:45:56,009 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 [2020-08-21 19:45:56,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-21 19:45:56,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-21 19:45:56,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-21 19:45:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-21 19:45:56,043 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-21 19:45:56,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:56,043 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-21 19:45:56,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:56,043 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-21 19:45:56,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 19:45:56,045 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:56,045 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] [2020-08-21 19:45:56,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 19:45:56,046 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:56,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:56,046 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-21 19:45:56,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:56,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827063281] [2020-08-21 19:45:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:56,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827063281] [2020-08-21 19:45:56,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:56,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:56,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474104267] [2020-08-21 19:45:56,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:56,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:56,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:56,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:56,073 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-21 19:45:56,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:56,102 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-21 19:45:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:56,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 19:45:56,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:56,108 INFO L225 Difference]: With dead ends: 1308 [2020-08-21 19:45:56,108 INFO L226 Difference]: Without dead ends: 890 [2020-08-21 19:45:56,110 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 [2020-08-21 19:45:56,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-21 19:45:56,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-21 19:45:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-21 19:45:56,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-21 19:45:56,141 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-21 19:45:56,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:56,142 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-21 19:45:56,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:56,142 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-21 19:45:56,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 19:45:56,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:56,144 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] [2020-08-21 19:45:56,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 19:45:56,145 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:56,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:56,145 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-21 19:45:56,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:56,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607512966] [2020-08-21 19:45:56,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:56,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607512966] [2020-08-21 19:45:56,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:56,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:56,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299010224] [2020-08-21 19:45:56,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:56,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:56,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:56,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:56,190 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-21 19:45:56,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:56,228 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-21 19:45:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:56,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 19:45:56,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:56,236 INFO L225 Difference]: With dead ends: 1548 [2020-08-21 19:45:56,236 INFO L226 Difference]: Without dead ends: 1546 [2020-08-21 19:45:56,237 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 [2020-08-21 19:45:56,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-21 19:45:56,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-21 19:45:56,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-21 19:45:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-21 19:45:56,280 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-21 19:45:56,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:56,281 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-21 19:45:56,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:56,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-21 19:45:56,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 19:45:56,285 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:56,285 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] [2020-08-21 19:45:56,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 19:45:56,285 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:56,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:56,286 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-21 19:45:56,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:56,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84845596] [2020-08-21 19:45:56,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:56,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84845596] [2020-08-21 19:45:56,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:56,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:56,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845972938] [2020-08-21 19:45:56,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:56,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:56,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:56,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:56,322 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-21 19:45:56,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:56,366 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-21 19:45:56,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:56,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 19:45:56,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:56,375 INFO L225 Difference]: With dead ends: 2956 [2020-08-21 19:45:56,375 INFO L226 Difference]: Without dead ends: 1706 [2020-08-21 19:45:56,378 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 [2020-08-21 19:45:56,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-21 19:45:56,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-21 19:45:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-21 19:45:56,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-21 19:45:56,429 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-21 19:45:56,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:56,429 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-21 19:45:56,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:56,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-21 19:45:56,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 19:45:56,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:56,432 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] [2020-08-21 19:45:56,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 19:45:56,433 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:56,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:56,433 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-21 19:45:56,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:56,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67548437] [2020-08-21 19:45:56,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:56,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67548437] [2020-08-21 19:45:56,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:56,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:56,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160387843] [2020-08-21 19:45:56,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:56,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:56,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:56,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:56,454 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-21 19:45:56,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:56,502 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-21 19:45:56,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:56,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 19:45:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:56,515 INFO L225 Difference]: With dead ends: 2556 [2020-08-21 19:45:56,515 INFO L226 Difference]: Without dead ends: 1738 [2020-08-21 19:45:56,518 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 [2020-08-21 19:45:56,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-21 19:45:56,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-21 19:45:56,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-21 19:45:56,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-21 19:45:56,584 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-21 19:45:56,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:56,585 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-21 19:45:56,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:56,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-21 19:45:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 19:45:56,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:56,589 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] [2020-08-21 19:45:56,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 19:45:56,589 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:56,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:56,590 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-21 19:45:56,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:56,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198164277] [2020-08-21 19:45:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:56,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198164277] [2020-08-21 19:45:56,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:56,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:56,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98602369] [2020-08-21 19:45:56,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:56,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:56,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:56,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:56,624 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-21 19:45:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:56,712 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-21 19:45:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:56,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 19:45:56,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:56,729 INFO L225 Difference]: With dead ends: 2956 [2020-08-21 19:45:56,730 INFO L226 Difference]: Without dead ends: 2954 [2020-08-21 19:45:56,731 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 [2020-08-21 19:45:56,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-21 19:45:56,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-21 19:45:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-21 19:45:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-21 19:45:56,843 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-21 19:45:56,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:56,843 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-21 19:45:56,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:56,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-21 19:45:56,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 19:45:56,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:56,848 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] [2020-08-21 19:45:56,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 19:45:56,848 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:56,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:56,849 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-21 19:45:56,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:56,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802197655] [2020-08-21 19:45:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:56,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802197655] [2020-08-21 19:45:56,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:56,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:56,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733714711] [2020-08-21 19:45:56,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:56,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:56,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:56,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:56,876 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-21 19:45:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:56,956 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-21 19:45:56,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:56,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 19:45:56,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:56,971 INFO L225 Difference]: With dead ends: 5836 [2020-08-21 19:45:56,971 INFO L226 Difference]: Without dead ends: 3338 [2020-08-21 19:45:56,976 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 [2020-08-21 19:45:56,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-21 19:45:57,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-21 19:45:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-21 19:45:57,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-21 19:45:57,075 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-21 19:45:57,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:57,076 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-21 19:45:57,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:57,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-21 19:45:57,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 19:45:57,083 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:57,083 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] [2020-08-21 19:45:57,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 19:45:57,086 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:57,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:57,086 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-21 19:45:57,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:57,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309871439] [2020-08-21 19:45:57,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:57,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:57,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309871439] [2020-08-21 19:45:57,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:57,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:57,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020711569] [2020-08-21 19:45:57,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:57,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:57,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:57,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:57,112 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-21 19:45:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:57,177 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-21 19:45:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:57,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 19:45:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:57,192 INFO L225 Difference]: With dead ends: 5004 [2020-08-21 19:45:57,192 INFO L226 Difference]: Without dead ends: 3402 [2020-08-21 19:45:57,196 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 [2020-08-21 19:45:57,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-21 19:45:57,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-21 19:45:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-21 19:45:57,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-21 19:45:57,322 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-21 19:45:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:57,323 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-21 19:45:57,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:57,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-21 19:45:57,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 19:45:57,329 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:57,329 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] [2020-08-21 19:45:57,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 19:45:57,329 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:57,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:57,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-21 19:45:57,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:57,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263347844] [2020-08-21 19:45:57,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:57,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:57,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263347844] [2020-08-21 19:45:57,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:57,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:57,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225618701] [2020-08-21 19:45:57,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:57,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:57,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:57,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:57,363 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-21 19:45:57,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:57,466 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-21 19:45:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:57,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 19:45:57,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:57,518 INFO L225 Difference]: With dead ends: 9804 [2020-08-21 19:45:57,518 INFO L226 Difference]: Without dead ends: 6538 [2020-08-21 19:45:57,528 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 [2020-08-21 19:45:57,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-21 19:45:57,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-21 19:45:57,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-21 19:45:57,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-21 19:45:57,723 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-21 19:45:57,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:57,723 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-21 19:45:57,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:57,724 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-21 19:45:57,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 19:45:57,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:57,732 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] [2020-08-21 19:45:57,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 19:45:57,732 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:57,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:57,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-21 19:45:57,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:57,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236841770] [2020-08-21 19:45:57,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:57,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:57,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236841770] [2020-08-21 19:45:57,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:57,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:57,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762718865] [2020-08-21 19:45:57,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:57,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:57,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:57,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:57,772 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-21 19:45:57,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:57,903 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-21 19:45:57,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:57,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 19:45:57,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:57,919 INFO L225 Difference]: With dead ends: 7052 [2020-08-21 19:45:57,919 INFO L226 Difference]: Without dead ends: 7050 [2020-08-21 19:45:57,922 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 [2020-08-21 19:45:57,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-21 19:45:58,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-21 19:45:58,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-21 19:45:58,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-21 19:45:58,120 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-21 19:45:58,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:58,120 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-21 19:45:58,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:58,121 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-21 19:45:58,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 19:45:58,134 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:58,134 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] [2020-08-21 19:45:58,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 19:45:58,134 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:58,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:58,135 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-21 19:45:58,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:58,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832623230] [2020-08-21 19:45:58,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:58,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:58,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832623230] [2020-08-21 19:45:58,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:58,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:58,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697702454] [2020-08-21 19:45:58,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:58,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:58,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:58,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:58,158 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-21 19:45:58,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:58,311 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-21 19:45:58,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:58,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 19:45:58,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:58,331 INFO L225 Difference]: With dead ends: 10634 [2020-08-21 19:45:58,332 INFO L226 Difference]: Without dead ends: 10632 [2020-08-21 19:45:58,336 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 [2020-08-21 19:45:58,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-21 19:45:58,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-21 19:45:58,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-21 19:45:58,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-21 19:45:58,577 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-21 19:45:58,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:58,578 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-21 19:45:58,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:58,578 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-21 19:45:58,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 19:45:58,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:58,593 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] [2020-08-21 19:45:58,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 19:45:58,593 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:58,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:58,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-21 19:45:58,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:58,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097006309] [2020-08-21 19:45:58,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:58,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:58,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097006309] [2020-08-21 19:45:58,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:58,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:58,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506438756] [2020-08-21 19:45:58,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:58,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:58,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:58,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:58,617 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-21 19:45:58,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:58,786 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-21 19:45:58,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:58,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 19:45:58,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:58,787 INFO L225 Difference]: With dead ends: 22664 [2020-08-21 19:45:58,787 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 19:45:58,820 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 [2020-08-21 19:45:58,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 19:45:58,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 19:45:58,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 19:45:58,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 19:45:58,821 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-21 19:45:58,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:58,821 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 19:45:58,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:58,822 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 19:45:58,822 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 19:45:58,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 19:45:58,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 19:45:58,847 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 19:45:58,847 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 19:45:58,847 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 19:45:58,847 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 19:45:58,847 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 19:45:58,848 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 19:45:58,848 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 19:45:58,848 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-21 19:45:58,848 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 19:45:58,848 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-21 19:45:58,848 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 19:45:58,848 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-21 19:45:58,848 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 19:45:58,848 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-21 19:45:58,849 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-21 19:45:58,850 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 19:45:58,850 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-21 19:45:58,850 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-21 19:45:58,850 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-21 19:45:58,850 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 19:45:58,850 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-21 19:45:58,850 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 19:45:58,851 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-21 19:45:58,851 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-21 19:45:58,851 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-21 19:45:58,851 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-21 19:45:58,851 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 19:45:58,851 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 19:45:58,851 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 19:45:58,851 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-21 19:45:58,851 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 19:45:58,852 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 19:45:58,852 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-21 19:45:58,852 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-21 19:45:58,852 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-21 19:45:58,852 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 19:45:58,852 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 19:45:58,852 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-21 19:45:58,852 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-21 19:45:58,852 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 19:45:58,853 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 19:45:58,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:45:58 BoogieIcfgContainer [2020-08-21 19:45:58,869 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:45:58,871 INFO L168 Benchmark]: Toolchain (without parser) took 5447.70 ms. Allocated memory was 139.5 MB in the beginning and 342.9 MB in the end (delta: 203.4 MB). Free memory was 101.4 MB in the beginning and 143.2 MB in the end (delta: -41.8 MB). Peak memory consumption was 161.6 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:58,873 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.3 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-21 19:45:58,875 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.97 ms. Allocated memory is still 139.5 MB. Free memory was 101.0 MB in the beginning and 90.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:58,875 INFO L168 Benchmark]: Boogie Preprocessor took 113.78 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 90.8 MB in the beginning and 179.3 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:58,878 INFO L168 Benchmark]: RCFGBuilder took 375.21 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 161.3 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:58,882 INFO L168 Benchmark]: TraceAbstraction took 4635.80 ms. Allocated memory was 201.9 MB in the beginning and 342.9 MB in the end (delta: 141.0 MB). Free memory was 160.3 MB in the beginning and 143.2 MB in the end (delta: 17.1 MB). Peak memory consumption was 158.1 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:58,884 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.3 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 316.97 ms. Allocated memory is still 139.5 MB. Free memory was 101.0 MB in the beginning and 90.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.78 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 90.8 MB in the beginning and 179.3 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 375.21 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 161.3 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4635.80 ms. Allocated memory was 201.9 MB in the beginning and 342.9 MB in the end (delta: 141.0 MB). Free memory was 160.3 MB in the beginning and 143.2 MB in the end (delta: 17.1 MB). Peak memory consumption was 158.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: 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: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.5s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 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...